Thymophylla aurea var. polychaeta

(A. Gray) Strother

Sida 11: 376. 1986.

Basionym: Hymenatherum polychaetum A. Gray Smithsonian Contr. Knowl. 3(5): 116. 1852
Synonyms: Dyssodia aurea var. polychaeta (A. Gray) M. C. Johnston Dyssodia polychaeta (A. Gray) B. L. Robinson Thymophylla polychaeta (A. Gray) Small
Treatment appears in FNA Volume 21. Treatment on page 244.

Plants to 30 cm. Peduncles 20–70 mm. Pappi of 18–20, 3–5-aristate scales 2–3 mm. 2n = 16.


Phenology: Flowering late summer.
Habitat: Grasslands and desert scrub-lands
Elevation: 1000–1500+ m

Distribution

V21-603-distribution-map.gif

N.Mex., Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Durango)

Discussion

Selected References

None.

Lower Taxa

None.
puberulent +  and glabrous +
not tailed +, rounded +  and obtuse +
darkened +  and pale +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
(A. Gray) Strother +
decurrent +
Hymenatherum polychaetum +
compound +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
yellow +  and bright-yellow +
3 cm30 mm <br />0.03 m <br /> (?) +
strigillose +  and glabrous +
cylindro-clavate +, obconic +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
N.Mex. +, Tex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +  and Mexico (Durango) +
1000–1500+ m +
tomentose +, puberulent +, lanate +, floccose +, canescent +, arachnose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grasslands and desert scrub-lands +
cymiform +, corymbiform +, discoid +  and radiate +
singly +  and radiant +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
obconic;campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
sessile +  and petiolate +
deltate +, spatulate +  and linear or filiform +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
of 10(-20) distinct scales +  and coroniform +
puberulent +  and glabrous +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Flowering late summer. +
12 +  and 15 +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
distinct +
18-20,3-5-aristate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Dyssodia aurea var. polychaeta +, Dyssodia polychaeta +  and Thymophylla polychaeta +
Thymophylla aurea var. polychaeta +
Thymophylla aurea +
variety +
cylindric +
toothed +  and entire +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
puberulent +  and glabrous +
0 cm0 mm <br />0 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +