Thymophylla pentachaeta var. hartwegii

(A. Gray) Strother

Sida 11: 377. 1986.

Basionym: Hymenatherum hartwegii A. Gray Smithsonian Contr. Knowl. 3(5): 117. 1852
Synonyms: Dyssodia hartwegii (A. Gray) B. L. Robinson Dyssodia pentachaeta var. hartwegii (A. Gray) Strother
Treatment appears in FNA Volume 21. Treatment on page 242.

Leaves 12–34 mm overall, lobes 3–7, unequal (terminal lobes usually notably longer than laterals). Peduncles 2–5 cm. Calyculi of 3–5 bractlets. Involucres cylindric, 3–5 × 2–3.5 mm. Phyllaries ca. 13, margins of outer distinct 1/3 or less their lengths, abaxial faces sparsely puberulous, often glabrescent. Disc-florets 16–40. Pappi of 5 erose scales alternating with 5, 1–3-aristate scales.


Phenology: Flowering early spring and late summer, following rains.
Habitat: Calcareous outcrops and bluffs, deserts
Elevation: 1500–2500 m

Distribution

V21-596-distribution-map.gif

Ariz., N.Mex., Tex., Mexico

Discussion

Selected References

None.

Lower Taxa

None.
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 hartwegii +
compound +  and simple +
0.6 cm6 mm <br />0.006 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
yellow +  and orange-yellow +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
strigillose +  and glabrous +
cylindro-clavate +, obconic +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, N.Mex. +, Tex. +  and Mexico +
1500–2500 m +
tomentose +, puberulent +, lanate +, floccose +, canescent +, arachnose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Calcareous outcrops and bluffs, deserts +
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 />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
sessile +  and petiolate +
1.2 cm12 mm <br />0.012 m <br /> (?) +  and 3.4 cm34 mm <br />0.034 m <br /> (?) +
linear +  and filiform +
unequal +
dentate to pinnatifid or palmatifid +  and entire +
1/5;lengths +
2-carpellate +
persistent +
of 10(-20) distinct scales +  and coroniform +
glabrous +  and puberulent +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering early spring and late summer, following rains. +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
alternating +
distinct +
1-3-aristate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
exalbuminous +
Illustrated +
spreading +  and erect +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Dyssodia hartwegii +  and Dyssodia pentachaeta var. hartwegii +
Thymophylla pentachaeta var. hartwegii +
Thymophylla pentachaeta +
variety +
cylindric +
toothed +  and entire +
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
less grayish +  and green +
glabrous +, glabrescent +, usually puberulent +  and canescent +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
less grayish;green +
glabrous +, glabrescent +, usually puberulent +  and canescent +