Forty-four (44) new species and varieties have been
described as new to science in Texas since 1994 -- many of these rare and of
conservation concern. 15 of the 43
occur within Texas and in one or more surrounding states (including
Mexico). 29 are endemic to Texas.
Texas Ecoregions for the new species are shown on the map
(top page). Three of those mapped in Gulf Prairies and Marshes are mostly
restricted to the Carrizo Sands. Only four of those from the Pineywoods
region are endemic to Texas.
Updates 2009: Convolvulus
carrii, Iva corbinii, Orobanche riparia
* Amaranthus tamaulipensis J. Henrickson, Sida 18:800, figs. 4, 5 [map], 8. 1999. Amaranthaceae. Tamaulipas amaranth. Similar to Amaranthus dubius
and A. brandegei, barely touching into southern Texas from a wide
distribution in Mexico.
(TAMAULIPAS. SAN LUIS
POTOSI. TABASCO. TEXAS: Cameron Co.). [Henrickson, J. 1999. Studies in New
World Amaranthus (Amaranthaceae).
Sida 18:783–807.] REGION F.
South Texas Plains
* Amaranthus X texensis J. Henrickson, Sida 18:791, figs. 4, 5 [map]. 1999. Amaranthaceae. A series of plants, some of which are sterile and produce no
mature seed, appear to represent hybrids or derivatives of hybridization,
perhaps from Amaranthus crassipes and A.
scleropoides. They have been
collected from loose red sands to sandy loams in southern Texas and adjacent
Tamaulipas, Mexico. (TAMAULIPAS. TEXAS:
Atascosa Co., Duval Co., Hidalgo Co., Webb Co.). [Henrickson, J.
1999. Studies in New World Amaranthus
(Amaranthaceae). Sida 18:783–807.] REGION F. South Texas Plains (endemic)
* Anthenantia texana Kral, Sida 21:296-297, figs. 1, 4. 2004.
Poaceae. Texas
anthenantia. Identified in the
past as A. villosa, particularly the broader and more distinctively
auriculate-leaved, paler-haired plants.
It grows in sands, sandy clay loam, sandy peat or silts of pine
flatwoods, pine-oak barrens, bog edges, ditchbanks, and clearings on the Gulf
Coastal Plain and contiguous physiography west of the Mississippi delta. (ARKANSAS: Bradley Co., Calhoun Co.,
Ouachita Co. LOUISIANA: Allen Par.,
Beauregard Par., Grant Par., Jefferson Davis Par., Natchitoches
Par., Winn Par. TEXAS: Angelina Co.,
Aransas Co., Austin Co., Calhoun Co., Freestone Co., Hardin Co., Harris Co.,
Houston Co., Jackson Co., Jasper Co., Liberty Co., Newton Co., Nueces Co.,
Robertson Co., Tyler Co.). All three
species of the genus are endemic to the southeastern USA. [Kral, R.
2004. An evaluation of Anthenantia
(Poaceae). Sida 21:293–310.] REGION A. Pineywoods (and B)
* Arida mattturneri Turner & Nesom, Sida 20:1418, figs. 1, 2. 2003. Asteraceae.
Mattturner’s tansy-aster. Known only from the immediate area of the type locality – north
of Ruidosa in “Blumberg Canyon’ in Presidio Co. -- where it grows along the sides of small gypseous canyons with
permanent streams, at 1400–1500 m.
[Turner, B.L. and G.L. Nesom.
2003. A new species of Arida
(Machaeranthera sect. Arida – Asteraceae: Astereae) from
trans-Pecos, Texas. Sida
20:1417–1420.] REGION J. Trans-Pecos,
Mtns and Basins (endemic)
* Berlandiera pumila var. scabrella Nesom & Turner, Sida 18:499, fig. 1 [map]. 1998. Asteraceae.
Rough green-eyes.
A variant in the southeastern corner of the range of western B.
pumila. A previous hypothesis that
such plants originated through hybridization is not confirmed. (LOUISIANA: Beauregard Par., Sabine Par.,
Vernon Par. TEXAS: Angelina Co., Hardin Co., Jasper Co., Newton Co., Polk Co.,
Sabine Co.). [Nesom, G.L. and B.L.
Turner. 1998. Taxonomy of the Berlandiera pumila complex (Asteraceae:
Heliantheae). Sida 18:493–502.] REGION A. Pineywoods
* Brazoria enquistii M.W Turner, Sida 20:1565, figs. 1 [map], 2 [map], 3. 2003. Lamiaceae.
Enquist’s brazos-mint.
Endemic to granitic streambeds of the Llano River watershed; only four
of the 16 known populations are not along such streambeds. (Mason Co., Llano Co., Burnet Co.). [Turner, M.W. 2003. A new species of Brazoria
(Lamiaceae) from the Central Mineral Region of Texas. Sida 20:1565-1571.] G.
Edwards Plateau (endemic)
* Carex shinnersii P. Rothrock & Reznicek, Novon 11:225, fig. 3E. 2001. Cyperaceae.
Shinners’ sedge.
Described from a type locality in Delta Co., Texas, but the species
occurs also in Oklahoma, Arkansas, and Kansas.
It grows in seasonally wet to dry, grassy ditches, swales, and slopes,
often in clayey soils at elevations of 100–300 meters. [Rothrock, P.E. and A.A. Reznicek. 2001.
The taxonomy of the Carex bicknellii group (Cyperaceae) and new
species for central North America.
Novon 11:205–228.] REGION A.
Pineywoods (and C and D)
* Centaurium blumbergianum Turner, Sida 21:87, figs. 1-3. 2004.
Gentianaceae. Blumberg’s
centaury. Occurs only along
saline streams and in seeps at the base of gypseous-limestone walls in dead-end
canyons in Presidio County. In these
habitats, it grows with other rare taxa, including Arida blepharophylla
and Arida mattturneri. It is
not obviously closely related to any other North American taxa. [Turner, B.L. 2004. A new species of Centaurium
(Gentianaceae) from trans-Pecos Texas.
Sida 21:87-91.] REGION J.
Trans-Pecos, Mtns and Basins (endemic)
* Clematis carrizoensis D. Estes, Sida 22:67, figs. 1 [map], 2,3,4. 2006. Ranunculaceae. Carrizo leather-flower. Occurs in or along edges of open,
well-drained, prairie-like areas in the Carrizo sands (Cherokee, Smith, Van
Zandt Co.). The species is allopatric
with its closest relatives. The plants
trail along ground or over low herbs, shrubs, or fences, apparently rarely
climbing higher into low branches of trees.
[Estes, D. 2006. A new narrowly endemic species of Clematis
(Ranunculaceae: subgenus Viorna) from northeastern Texas. Sida 22:65-77.] REGION B. Gulf Prairies and Marshes (Carrizo) (endemic)
* Convolvulus carrii B.L. Turner,
Phytologia 91:394, figs. 1, 2, 3 [map].
2009. Convolvulaceae. Carr’s bindweed. Known only from Holocene sands of Brooks and
Hidalgo counties in south Texas. “The
novelty is closely similar to Covolvulus equitans but can be distinguished by a
syndrom of characters, including thickened, marked venose, silvery-pubescent,
markedly dentate, deltoid leaves (vs. thin, sparsely pubescent, and highly
variable as to shape and marginal dentation); flowering peduncles 5-7 cm long
(vs. shorter); large white corollas with maroon or purplish throats, rarely not
(vs. smaller and white to pale pink, the purple throats only rarely present);
and seed coats smooth or nearly so (vs. mostly papillose).” Turner conjectures that C. carrii
evolved on these ancestral dunes out of the more widespread and variable C.
equitans. “No plants of C.
equitans were found in the deep sandy soils to which C. carrii is
restricted.” [Turner, B.L. 2009.
Convolvulus carrii, a localized endemic from southernmost
Texas. Phytologia 91: 394-400.] REGION
F. South Texas Plains
* Crataegus nananixonii Phipps & O'Kennon, Sida 17:569, fig. 1. 1997. Rosaceae.
Nixon's Little Hawthorn. Known only from Nacogdoches Co., where it is locally common in
open sandy scrubland. Superficially
resembling C. uniflora.
[Phipps, J.B. and R.J. O’Kennon.
1997. Crataegus nananixonii
(Rosaceae Ser. Intricatae) a new species of hawthorn from Eastern
Texas. Sida 17:569-574.] REGION A.
Pineywoods (endemic)
* Croton bigbendensis B.L. Turner,
Sida 21:79, figs. 1, 2, 3 [map]. 2004.
Euphorbiaceae. Big Bend
croton. Largely confined to
the lower elevations of the Big Bend region in Brewster, Presidio, and Hudspeth
counties, where it dominates sandy flats along the Rio Grande. Flowering April through August. So far as known, it does not co-occur or
intergrade with Croton dioicus, with which it has been confused. [Turner, B.L. 2004. Croton
bigbendensis (Euphorbiaceae), a new species from trans-Pecos Texas. Sida 21:79–85.] REGION J. Trans-Pecos, Mtns and Basins (endemic but to be
expected in Coahuila and Chihuahua)
* Dalea austrotexana B.L. Turner, Phytologia 88:289, fig. 2 [map]. 2006. Fabaceae. South Texas
dalea. Populations from
southernmost Texas previously identified within Dalea lanata var. lanata
have been described as a new species, D. austrotexana. It occurs in only a few counties, where it
is largely confined to dune sands.
(TEXAS: Brooks Co., Cameron Co., Jim Hogg Co., Kenedy Co., Starr Co.). In addition, Dalea lanata var. terminales
is treated at species rank, where it takes the name D. glaberrima S.
Wats. – occurs in Nevada, Utah, Arizona, New Mexico, Texas, Coahuila, and Nuevo
Leon. [Turner, B.L. 2006.
Dalea austrotexana (Fabaceae), a new speces from southernmost
Texas. Phytologia 88:288–293.] REGION F. South Texas Plains (endemic)
* Eriogonum riograndis Nesom, Sida 20:32, figs. 1, 2 [map]. 2002. Polygonaceae. Rio
Grande buckwheat. Segregated
from E. multiflorum with the observation that “Conspicuous
morphological and geographic discontinuity between Eriogonum multiflorum
and E. riograndis is the predominant feature of their contrast. Putative morphological intermediates suggest
that hybridization may occur where they come into geographically close contact,
but no zone of intergradation exists to suggest that significant gene flow
occurs between the two taxa” (Nesom
2002, p. 37). The few putative hybrids
were cited in the publication. Reveal
(in FNA Vol. 5, 2005) treated the taxon as E. multiflorum var. riograndis
(G.L. Nesom) Reveal (Harvard Pap. Bot. 9: 184. 2004), noting that “Variety riograndis is found just
to the west and south of var. multiflorum, and a series of overlapping
(and intergrading) populations occurs along their shared boundary.” Reveal did not provide any further evidence
or cite specimens, so the basis of his observation and taxonomic conclusion is
obscure. (TEXAS: Aransas Co., Brooks
Co., Calhoun Co., Duval Co., Hidalgo Co., Jim Hogg Co., Jim Wells Co., Karnes
Co., Kenedy Co., Kleberg Co., Nueces Co., Refugio Co., San Patricio Co., Webb
Co., Willacy Co., Zapata Co.). [Nesom,
G.L. 2002. A new species of Eriogonum (Polygonaceae) from south
Texas. Sida 20:31–38.] REGION F. South Texas Plains (endemic)
* Froelichia latifolia R.A. McCauley, Syst. Bot. 29:73, fig. 5, 6 [map]. 2004. Amaranthaceae. Broad-leaf snake cotton. Southeastern Texas, “most abundant near
Corpus Christi and south through Padre Island to central Kenedy County. It also is quite abundant south of the
Bastrop Pines region in Bastrop Co.. In
open disturbed grassland habitats, forest edges, and ocean dunes.” Mostly previously identified as F.
floridana, but closest phylogenetically to F. texana. [McCauley, R.A. 2004. New taxa and a new
combination in the North American species of Froelichia
(Amaranthaceae). Syst. Bot.
29:64–76.] REGION B. Gulf Prairies and
Marshes (sands, including Carrizo) (endemic)
* Gamochaeta argyrinea Nesom, Sida 21:718, fig. 1, 3, 4, 6 [map]. 2004. Asteraceae. Silver
cudweed. Commonly
misidentified as Gamochaeta purpurea. Common in disturbed habitats in many east Texas counties and
across the southeastern USA. [Nesom,
G.L. 2004. New species of Gamochaeta (Asteraceae: Gnaphalieae) from
the eastern United States and comments on similar species. Sida 21:717–742.] REGION A. Pineywoods
* Gratiola quartermaniae D. Estes, J. 1:163, fig. 3, 5 [map], 8. 2007. Plantaginaceae. Quarterman’s
hedge-hyssop. Shallow soil
over limestone in Texas, disjunct to other regions, most common in central
Tennessee. ONTARIO. ALABAMA.
ILLINOIS. TENNESSEE. TEXAS:
Bell, Llano, Williamson). [Estes, D.
and R.L. Small. 2007. Two new species of Gratiola
(Plantaginaceae) from eastern North America and an updated circumscription for Gratiola
neglecta. J. 1:149-170.] REGION G. Edwards Plateau (endemic)
* Hedyotis nigricans var. austrotexana B.L. Turner, Phytologia 79:15, fig. 2 [map]. 1995
[1996]. Rubiaceae. South Texas star-violet. (TEXAS:
Bee, Cameron, DeWitt, Goliad, Jackson, Jim Hogg, Live Oak, McMullen, San
Patricio). [Turner, B.L. 1995. Taxonomic overview of Hedyotis
nigricans (Rubiaceae) and closely allied taxa. Phytologia 79:12-21.]
REGION F. South Texas Plains (endemic)
* Hedyotis nigricans var. gypsophila B.L. Turner, Phytologia 79:15, fig. 4 [map]. 1995 [1996]. Rubiaceae.
Gypsum star-violet. Gypseous
substrate. (MEXICO: NUEVO LEON. TEXAS: Culberson Co., Jeff Davis Co.). [Turner, B.L. 1995. Taxonomic overview of Hedyotis nigricans
(Rubiaceae) and closely allied taxa.
Phytologia 79:12-21 [figs. 1 [map], 2, 3]. Turner, B.L. 2002. Biological status of Hedyotis nigricans
var. gypsophila (Rubiaceae) in Texas.
Sida 20:215-220. (affirms validity of taxon) REGION J. Trans-Pecos, Mtns and Basins
* Heliotropium powelliorum B.L. Turner, Lundellia 10:7, figs. 1 [map], 2.
2007. Boraginaceae. Powell’s heliotrope. Heliotropium powelliorum occurs in
Brewster Co. and adjacent Chihuahua, Mexico. Allopatric with H. torreyi but not intergrading with
it. [Turner, B.L. 2007.
Distribution of Heliotropium torreyi (Boraginaceae), and the
description of a new species from its midst.
Lundellia 10:7-10.]. REGION J. Trans-Pecos, Mtns and Basins
* Ipomoea costellata var. edwardsensis O’Kennon & Nesom, Sida 20:39, figs. 1, 2, 3 [map].
2002. Convolvulaceae. Edwards Plateau morning glory. Endemic to the Edwards Plateau region. It is set apart from I. costellata
elsewhere in its range by a combination of shorter peduncles and bright white,
rotate flowers with fewer and deeper lobes, as well as by phenology and
geography. In fact, it is disjunct and
isolated from all other populations identified as I. costellata (Webb
Co. and trans-Pecos Texas, New Mexico, Arizona, and Mexico to Guatemala) and
probably should be treated at specific rank. (TEXAS: Bexar Co., Burnet Co.,
Gillespie Co., Llano Co., Travis Co., Uvalde Co.). [O’Kennon, R.J. and G.L. Nesom. 2002.
A new variety of Ipomoea costellata (Convolvulaceae)
from the Edwards Plateau region of Texas.
Sida 20:39–46.] REGION G.
Edwards Plateau (endemic)
* Iva corbinii B.L.
Turner, Lundellia 12: 5, 2009.
Asteraceae. Austin iva. Apparently
restricted to the Colorado River bottoms of Travis County,
Texas. It is a remarkably distinct
species, having predominately axillary, single heads; its closest relationship
appears to be with I. axillaris, but differs from that taxon by numerous
traits, most noteworthy by its involucres, which are composed of non-united
bracts, suggesting a primitive position in the genus Iva. A photograph of the type collection is
provided, along with a colored picture of its eponymous collector standing
amongst a living population of the taxon.
[Turner, B.L. 2009.
Iva corbinii (Asteraceae): A remarkable new species from Travis
County, Texas. Lundellia 12: 5–7.]
* Laennecia turnerorum Nesom, Sida
19:789, fig. 1. 2001. Asteraceae. Turner’s laennecia. A spring ephemeral -- the small
size, disciform capitula, and short duration of the plants probably account for
their escape from detection by earlier botanists. B.L. Turner, who made the type collection, returned to the type
locality about four weeks later and found that plants of the new species had
died and dried essentially beyond recognition, while those of Laennecia
coulteri at the same site remained alive and in reproductive
condition. The type locality is about
60 miles south of Alpine (Brewster Co.) in a large basin essentially surrounded
by desert mountains. Laennecia
turnerorum was collected in silty limestone-derived soil in a low area with
desert grasses, with abundant Larrea, scattered Yucca, and
other shrubs occur slightly upslope.
[Nesom, G.L. 2001. Laennecia turnerorum
(Asteraceae: Astereae), a new species from trans-Pecos, Texas. Sida 19:789–793.]. REGION J. Trans-Pecos,
Mtns and Basins (endemic)
* Liatris aestivalis Nesom & O'Kennon, Sida 19(4):768-776, figs. 1-2, 6 [map].
2001. Asteraceae. Summer gayfeather. Known only from a few counties in
north-central Texas and south-central Oklahoma, where it grows in pine-oak and
oak-juniper woodlands, blackland prairies, and other grassland habitats. It has an affinity for sites with shallow
soils over limestone outcrops (with the exception of plants on deep sands in
Parker County). Several populations are
located on public lands including Platt National Park in southern Oklahoma and
LBJ National Grassland in Texas.
(OKLAHOMA: Atoka Co., Bryan Co., Johnston Co., Love Co., Marshall Co.,
Murray Co. TEXAS: Anderson Co., Cooke Co., Coryell Co., Denton Co., Hays Co.,
Montague Co., Parker Co., Tarrant Co., Travis Co., Wise Co.). [Nesom, G.L. and R.J.
O’Kennon. 2001. Two new species of Liatris series Punctatae
(Asteraceae: Eupatorieae) centered in north-central Texas. Sida 19:767–787.] REGION E. Cross Timbers and Prairies
* Liatris elegans Michx. var. bridgesii Mayfield, Sida 20:598. 2003. Asteraceae. Bridges’s
gayfeather. Endemic to the
Carrizo and adjacent Eocene sand formations in central Texas (Anderson,
Bastrop, Freestone, Grimes, Hardin, Henderson, Houston, Lee, Limestone, Nacogdoches,
Robertson, San Augustine, Shelby, Van Zandt, Walker, Williamson, Wood
Co.). Distinguished by white, petaloid,
recurving floral bracts. [Mayfield,
M.H. 2003. The varieties of Liatris elegans (Asteraceae). Sida 20:597-603.] REGION B. Gulf Prairies and Marshes (Carrizo) (endemic)
* Liatris glandulosa Nesom & O'Kennon, Sida 19(4):778-786, figs. 3-4, 6 [map].
2001. Asteraceae. Sticky gayfeather. Known only from limestone outcroppings and
prairies from four counties in north-central Texas. One population (at the the locality) is located at the Spring
Creek Forest Preserve in Dallas County and is currently protected. (TEXAS: Bosque Co., Dallas Co., McLennan
Co., Travis Co.). [Nesom, G.L. and
R.J. O’Kennon. 2001. Two new species of Liatris series Punctatae
(Asteraceae: Eupatorieae) centered in north-central Texas. Sida 19:767–787.] REGION E. Cross Timbers and Prairies (endemic)
* Nemophila sayersensis B.B. Simpson, Neff, & Helfgott, Lundellia 4:31. 2001. Hydrophyllaceae. Sayers baby-blue-eyes. Restricted to fossil beach sand areas in central Texas,
contrasting with the more common and widespread N. phacelioides, which
occurs on sandy loam soils in areas moist and shady in the spring. (TEXAS: Bastrop Co., Brazos Co., Burleson
Co., Gonzales Co., Grimes Co., Guadalupe Co., Lee Co., Robertson Co.,
Washington Co.). [Simpson, B.B., D.M.
Helfgott, and J.L. Neff. 2001. A new cryptic species of Nemophila
(Hydrophyllaceae) from Texas and the leptotypification of N. phacelioides
Nuttall. Lundellia 4:30-36.] REGION B. Gulf Prairies and Marshes
(Carrizo) (endemic)
* Orobanche riparia L.T. Collins, J. Bot. Res. Inst. Texas 3: 7. 2009. Orobanchaceae. River broomrape.
In Texas in Brewster and El Paso counties and in the northern Panhandle.
A 1973 Ph.D. dissertation by Collins
indicated “formal recognition of two ecological races within O. ludoviciana
sensu stricto with different host ranges: one inhabiting uplands and the other
confined to bottomlands associated with major river systems. Recent additional investigations have
revealed further evidence supporting recognition of these two races as distinct
taxonomic entities. The present paper
therefore discusses the morphological distinctions between them; it proposes
retention of the upland form as O. ludoviciana and recognition of the
bottomland form as a distinct species, O. riparia, sp. nov.” [Collins, L.T., A.E.L. Colwell, and G.
Yatskievych. 2009. Orobanche riparia (Orobanchaceae), a
new species from the American Midwest.
J. Bot. Res. Inst. Texas 3: 3–11.]
* Packera texensis O’Kennon & Trock, Sida 20:945, figs. 1, 2 [map]. 2003. Asteraceae.
Central Texas groundsel. Endemic to the granitic sands of the Central Mineral Region with
the Edwards Plateau. (TEXAS: Callahan
Co., Gillespie Co., Llano Co., Mason Co.).
“Packera texensis arises quickly from evergreen winter rosettes
during the January rains and blooms as early as the first week in February,”
continuing through March. [Trock, D.K.
and R.J. O’Kennon. 2003. A new species of Packera
(Asteraceae: Senecioneae) from the Edwards Plateau of Texas. Sida 20:945–951.] REGION G. Edwards Plateau (endemic)
* Phaseolus texensis A. Delgado and W.R. Carr, Lundellia 10:13, figs. 1-3. 2007. Fabaceae.
Texas pea.
Known only from rocky canyons of the eastern and southern Edwards
Plateau of central Texas. (TEXAS: Bandera Co., Kerr Co., Travis Co., Uvalde
Co.). Its distinction is supported by
morphological and molecular-phylogenetic data and a discrete and limited
geographical range. [Delgado-Salinas,
A. and W.R. Carr. 2007. Phaseolus texensis (Leguminosae:
Phaseolinae): A new species from the Edwards Plateau of central Texas. Lundellia 10:11-17.] REGION G. Edwards Plateau (endemic)
* Philadelphus serpyllifolius var. intermedius B.L. Turner, Lundellia 9:37. 2006. Hydrangeaceae. (TEXAS: Brewster Co., Pecos Co.). [Turner, B.L. 2006. Species of Philadelphus
(Hydrangeaceae) from trans-Pecos Texas.
Lundellia 9:34-40.] REGION J.
Trans-Pecos, Mtns and Basins (endemic)
* Prenanthes carrii Singhurst, O’Kennon, & Holmes, Sida 21:187, figs. 1 [map], 2.
2004. Asteraceae. Carr’s Rattlesnake-root. Endemic to the southwest Edwards Plateau and
occurs primarily in rich soils in woodlands at the upper reaches of canyons
where springs flow due to geologic contacts.
(TEXAS: Bandera Co., Gillespie Co., Kerr Co., Real Co.). [Singhurst, J.R., R.J. O’Kennon, and W.C.
Holmes. 2004. The genus Prenanthes (Asteraceae: Lactuceae) in Texas.
Sida 21:181–192.] REGION G. Edwards
Plateau (endemic)
* Pseudognaphalium austrotexanum Nesom, Sida 19(3):507-511, figs. 1, 2 [map].
2001. Asteraceae. South Texas false cudweed. Apparently a narrowly distributed species
from coastal and near-coastal localities in southeastern Texas and northeast
Mexico. Probably endemic to open
coastal grasslands and other coastal habitats with one record from Brazoria
National Wildlife Refuge. Not collected
in Texas since 1981. (NUEVO LEON. TEXAS: Brazoria Co., Brazos Co., Brooks Co.,
Frio Co., Harris Co., Jim Hogg Co., Kenedy Co., Matagorda Co., San Patricio
Co., Uvalde Co.). [Nesom, G.L. 2001.
Pseudognaphalium austrotexanum (Asteraceae: Gnaphalieae), a new
species from southeastern Texas and adjacent Mexico. Sida 19:507–511.] REGION
F. South Texas Plains
* Schiedeella arizonica P.M. Brown, N. Amer. Orchid J. 6:3. 2000.
Orchidaceae. Indian
braids, Arizona red-spot. The
type locality in Pima Co., Arizona.
ARIZONA: Cochise, Graham, Greenlee, Pima, Santa Cruz cos. NEW MEXICO: Grant, Lincoln, Otero. TEXAS: Culberson Co., Jeff Davis Co. [Brown, P.M. and R. Coleman. 2000.
Schiedeella arizonica, a new species from the southwestern
United States. N. Amer. Native Orchid
J. 6:3-17.] REGION J. Trans-Pecos, Mtns
and Basins
* Senecio quaylei T.M.
Barkley, Sida 19(2):286-289, figs. 1-2. 2000.
Asteraceae. Quayle’s
groundsel. A putatively rare
annual endemic of north-central Texas known only from three sandy sites in the
vicinity of Mineral Wells in Parker Co.: an abandoned railroad right-of-way, a
recently burned prairie, and a disturbed field. Flowering March through April.
It is regarded by Turner (pers. comm. and in the Atlas of the Vascular
Plants of Texas) as a form of S. ampullaceus, from which it differs in its
larger size (perhaps gigas) and completely glabrous stems and leaves. [Barkley, T.M. 2000. Senecio quaylei
(Asteraceae: Senecioneae), a new species from north-central Texas, U.S.A. Sida 19:285–289.] REGION E. Cross Timbers and Prairies (endemic)
* Solidago juliae Nesom, Phytologia 67:445, fig. 1 [map]. 1989 [not included in Hartman
& Nelson 1998]. Asteraceae. Julia's goldenrod. A species of the Edwards Plateau, extending
westward and southward into the trans-Pecos region and northern Mexico. Very true to wet soil along the rocky edges
of streams and rivers with permanent water.
(CHIHUAHUA. COAHUILA. TEXAS: Bandera Co., Blanco Co., Brewster
Co., Gillespie Co., Kendall Co., Kinney Co., Presidio Co., Real Co., Reeves
Co., Travis Co., Uvalde Co., Val Verde Co.).
[Nesom, G.L. 1989. The taxonomy of the Solidago canadensis (Asteraceae: Astereae) complex in Texas, with a new species from Texas and
Mexico. Phytologia 67:441–450.] Synonym
= Solidago canadensis var. canescens A. Gray. REGION G. Edwards
Plateau (and 9)
* Solidago
wrightii var. guadalupensis Nesom,
Phytologia 90: 00. 2008.
Asteraceae. Guadalupe
Mountains Goldenrod. A race near
the southeastern corner of the range of the species differs from typical S.
wrightii in its lanceolate to linear-lanceolate leaves and glabrate achenes. It occurs at 4800–7100 feet elevation and
grows in cliff crevices, slopes and ridges, mine tailings, canyon bottoms,
gravel alluvium of stream beds, always over limestone, in vegetation of
acacia-juniper-dasylirion-lechuguilla, oak, oak-maple, and yellow
pine-maple-hophornbeam-madrone. Flowering (May–)Jun–Aug(–Sep). (NEW MEXICO: Chaves Co., Eddy Co.; TEXAS:
Culberson Co.). REGION J. Trans-Pecos, Mtns and
Basins. [Nesom, G.L. 2008.
Taxonomic review of Solidago petiolaris and S. wrightii (Asteraceae:
Astereae). Phytologia 90: 21-32.]
* Spiranthes sylvatica P.M. Brown, N. Amer. Native Orchid J. 7(3):194, figs. 1-4. 2001. Orchidaceae. Woodland ladies-tresses. “Differing from
Spiranthes praecox by its
creamy-green coloration, larger flowers and woodland habitat.” Type from Levy Co., Florida. “Range: eastern Texas (Jasper Co., Sabine
Co.) eastward along the coastal plain, throughout central and northern Florida
and northward along the coastal plain to southeastern Virginia. [Brown,
P.M. 2001. Recent taxonomic and distributional notes from Florida 11. N. Amer. Orchid J. 7:192-205. 2001.] REGION A. Pineywoods
* Spiranthes eatonii P.M. Brown, N. Amer. Orchid J. 5:9, figs. 1, 2. 1999. Orchidaceae. Eaton’s ladies-tresses. The type locality in Dade Co., Florida. “Habitat: dry to damp open pinelands often
with Aristida sp., Seranoa sp., Pinguicula sp., Drosera
sp., and Polygala sp. Range:
eastern Texas (Jefferson Co.), southern Louisiana, southern Alabama, southern
and eastern Georgia, and north to Virginia primarily on the coastal
plain.” [Brown, P.M. 1999.
Recent taxonomic and distributional notes from Florida 1. N. Amer. Native Orchid J. 5:5-15.] REGION A. Pineywoods
* Stanleya pinnata var. texana B.L. Turner, Lundellia 7:39. 2005.
Brassicaceae. Texas
golden prince’s plume. Var. texana
is distinguished from other varieties of S. pinnata in having smaller
flowers, nearly glabrous gynophores, and lanceolate entire leaves (never deeply
divided or pinnate). It is isolated from the closest known populations of S.
pinnata by some 500 km and is represented by small populations largely
restricted to bare gypso-calcareous outcrops in southern Brewster Co. [Turner, B.L. 2005. A new variety of Stanleya
pinnata (Brassicaceae) from the Big Bend Region of Trans-Pecos,
Texas. Lundellia 7:39-43.] REGION J. Trans-Pecos, Mtns and Basins
(endemic)
* Triphora trianthophorus (Sw.) Rydb. var. texensis P.M. Brown & R. Pike, N. Amer. Native Orchid J.
12:5, figs. 1-6. 2006.
Orchidaceae. Texas
three-birds orchid. Known only
from the type locality in Davy Crockett National Forest in Houston Co., the
population growing along the bottom and sides of “a short, shallow,
intermittent drainage slope having very little vegetation and abundant mulch”
in oak-hickory woods. Differing from
typical T. trianthophorus var. trianthophorus in the ovate
lip, smaller, snow-white flowers with a lime-green beard, and bright green
stems and foliage. Holotype: BRIT. [Brown, P.M. & R. Pike. 2006.
Triphora trianthophora var. texensis (Orchidaceae), a
new variety endemic to texas. N. Amer.
Native Orchid J. 12:4–10.] REGION A.
Pineywoods (endemic)
* Wissadula parvifolia Fryxell, Lundellia 10:3, fig. 2. 2007.
Malvaceae. Small-leaved
yellow velvet-leaf. Known only
from Hidalgo Co., where it occurs on the Tres Corales Reserve (Nature
Conservancy), locally common in disturbed sites. [Fryxell, P.A. 2007. Two new species of Malvaceae from Sonora,
Mexico and Texas. Lundellia 1-6.] REGION F. South Texas Plains (endemic)
* Xanthisma
spinulosum var. austrotexanum B.L. Turner (stat. & nom.
nov., based on Haplopappus texensis R.C. Jackson),
Phytologia 89:350, fig. 1 [map]. 2007.
Asteraceae. South Texas
goldenaster. These plants were
recognized at specific rank in 1962 by Jackson but not subsequently included in
active taxonomic accounts of the Texas flora (usually treated as a synonym of Machaeranthera
pinnatifida). Var. austrotexanum
apparently intergrades with var. spinulosum in their zone of
contact. (TEXAS: Brooks Co., Hidalgo
Co., Jim Wells Co., Kleberg Co.).
[Turner, B.L. 2007. Xanthisma spinulosum var. austrotexanum
(Asteraceae: Astereae), an endemic of southernmost Texas. Phytyologia 89:349–352; G.L. Nesom
and B.L. Turner. Taxonomic review of the Xanthisma spinulosum
complex (Asteraceae: Astereae).
Phytologia 89:371–389.] REGION
F. South Texas Plains (endemic)
* Yucca cernua E.L. Keith, Sida 20:892, figs. 1-2. 2003.
Agavaceae. Nodding yucca. Apparently is restricted to brownish, acidic
clayey soils of the Redco Soil Series in Jasper and Newton counties. One large population of ca. 1000 plants and
six small populations of less than 100 plants each are known. The epithet refers to the characteristic
tendency of the inflorescence branches to recurve and droop as they lengthen,
an apparently distinctive feature separating it from all other Yucca
species. [Keith, E.L. 2003.
Yucca cernua (Agavaceae: series Rupicolae), a new species from
Newton and Jasper counties in eastern Texas.
Sida 20:891-898.] REGION A.
Pineywoods (endemic)
Guy Nesom
3 December 2009