Symphyotrichum drummondii var. texanum

(E. S. Burgess) G. L. Nesom

Phytologia 77: 279. 1995.

Common names: Texas aster
Basionym: Aster texanus E. S. Burgess in J. K. Small, Fl. S.E. U.S., 1214, 1339. 1903
Synonyms: Aster drummondii var. texanus (E. S. Burgess) A. G. Jones Aster texanus var. parviceps Shinners Symphyotrichum drummondii var. parviceps (Shinners) G. L. Nesom Symphyotrichum texanum
Treatment appears in FNA Volume 20. Treatment on page 504.

Plants 30–80 cm. Stems ± densely hirsute, particularly distally. Leaves membranous, becoming thickish, brittle; basal and proximal winged-petiolate; proximal cauline blade bases cordate, becoming rounded-truncate distally. Heads in open, paniculiform arrays with very long, widely spreading branches. Peduncles 1–4 cm, densely, minutely bracteate. Involucres turbinate to hemispheric, 3.8–5.2 mm. Ray corollas bluish white. Cypselae strigillose. 2n = 32.


Phenology: Flowering Sep–Nov (seldom spring).
Habitat: Loamy soils or well-drained clays, bottomlands, open deciduous woods, oak-juniper woodlands
Elevation: 0–100+ m

Distribution

V20-1127-distribution-map.gif

Ark., Kans., La., Miss., Mo., Okla., Tex., Mexico (Coahuila)

Discussion

Variety texanum is known mainly from the Ozarks, east-central Texas, and the Edwards Plateau; it is disjunct to Coahuila (G. L. Nesom 1993g).

Selected References

None.

Lower Taxa

None.

"thickish" is not a number.

scabrous +  and densely piloso-strigose +
scabrous +  and glabrate +
not tailed +, rounded +  and obtuse +
long-petiolate +
8.5 cm85 mm <br />0.085 m <br /> (10 cm100 mm <br />0.1 m <br />) +
distinct +
1 cm10 mm <br />0.01 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
subequal +
scarious +
8mm +  and 60mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +  and open +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(E. S. Burgess) G. L. Nesom +
long-petiolate +
8.5 cm85 mm <br />0.085 m <br /> (10 cm100 mm <br />0.1 m <br />) +
1 cm10 mm <br />0.01 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
rounded +  and attenuate or cuneate +
indurate +
8mm;60mm +
Aster texanus +
long-petiolate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
5 cm50 mm <br />0.05 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (11 cm110 mm <br />0.11 m <br />) +
ovate;ovate or oblong-lanceolate +
reduced +
1mm;50mm +
rugulose +  and muricate +
strigoso-ciliate +  and pilosulous +
subulate +  and linear-oblanceolate +
paniculiform +  and racemiform +
subsecund +  and divaricate +
reduced +
long to relatively +
barbellulate +  and barbellate +
sessile +  and petiolate +
Texas aster +
not 2-lipped +  and actinomorphic +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
cream +  and yellow +
reddish purple;purple;deep +
at maturity , more or less ampliate , tubes usually shorter +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
brown +  and tan +
compressed +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
sessile +, subpetiolate +  and petiolate +
Ark. +, Kans. +, La. +, Miss. +, Mo. +, Okla. +, Tex. +  and Mexico (Coahuila) +
0–100+ m +
glabrate +  and sparsely strigillose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Loamy soils or well-drained clays, bottomlands, open deciduous woods, oak-juniper woodlands +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
turbinate;hemispheric +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
2 (?) +  and 5 (?) +
1mm;1.8mm +
winged-petiolate +
proximal +  and basal +
membranous +
decurrent +
reflexed;spreading;erect +
triangular +  and lanceolate +
long-petiolate +
entire +, serrulate +, crenate-serrate +  and sharply serrate +
8.5 cm85 mm <br />0.085 m <br /> (10 cm100 mm <br />0.1 m <br />) +
10mm;85mm +
strigoso-ciliate +  and scabrous +
usually rounded +  and obtuse +
crenate-serrate to serrate +
8mm +  and 60mm +
2-carpellate +
cream +  and rose-tinged +
persistent +
25 +  and 40 +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Sep–Nov (seldom spring). +
lanceolate +  and narrowly oblong-lanceolate +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1mm;0.2mm +
branched +  and simple +
1 +  and 5 +
appendaged +  and truncate +
papillate +  and smooth +
Aster drummondii var. texanus +, Aster texanus var. parviceps +, Symphyotrichum drummondii var. parviceps +  and Symphyotrichum texanum +
Symphyotrichum drummondii var. texanum +
Symphyotrichum drummondii +
variety +
funnelform-campanulate +  and cylindric +
mucronulate +
at maturity , more or less ampliate , tubes usually shorter +
ampliate +
with stout , often woody caudices +  and short-rhizomatous +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
lanceolate +  and linear-lanceolate +