Thymophylla tephroleuca

(S. F. Blake) Strother

Sida 11: 378. 1986.

EndemicConservation concern
Basionym: Dyssodia tephroleuca S. F. Blake J. Wash. Acad. Sci. 25: 320. 1935
Treatment appears in FNA Volume 21. Treatment on page 241. Mentioned on page 240.

Subshrubs or shrubs, ashy white, 10–30 cm, lanate to tomentose. Stems erect. Leaves all or mostly alternate; blades not lobed, linear to filiform, 10–15 × 0.3–1 mm, margins usually entire, sometimes 3-fid distally. Peduncles 10–30 mm, tomentose. Calyculi of 3–4 linear bractlets, lengths 1/2+ phyllaries. Involucres campanulate, 5–7 mm. Phyllaries 12–13, margins of outer distinct less than 1/4 their lengths, abaxial faces tomentose. Ray-florets 12–13; corollas golden yellow, laminae 6–8 × 3–4 mm. Disc-florets ca. 30; corollas yellow, 4.5–5 mm. Cypselae 3–4 mm; pappi of 10–11 subequal scales 4–5 mm (each 3–5-aristate). 2n = 16.


Phenology: Flowering early spring and late summer, following rains.
Habitat: Light, sandy soils
Elevation: 50–100 m

Discussion

Of conservation concern.

Thymophylla tephroleuca probably grows also in adjacent Mexico. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.
... more about "Thymophylla tephroleuca"
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 +
(S. F. Blake) Strother +
decurrent +
Dyssodia tephroleuca +
compound +  and simple +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
linear;filiform +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
deltate;linear +
barbellulate +  and barbellate +
yellow +  and golden yellow +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
strigillose +  and glabrous +
cylindro-clavate +, obconic +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
50–100 m +
tomentose +, puberulent +, lanate +, floccose +, canescent +, arachnose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Light, sandy soils +
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 />) +
campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
sessile +  and petiolate +
deltate +, spatulate +  and linear or filiform +
0 +  and 1/4 +
2-carpellate +
persistent +
of 10(-20) distinct scales +  and coroniform +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering early spring and late summer, following rains. +
12 +  and 13 +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
distinct +
10 +  and 11 +
subequal +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
exalbuminous +
Endemic +  and Conservation concern +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Dyssodia sect. Gnaphalopsis +, Dyssodia sect. Hymenatherum +  and Hymenatherum +
Thymophylla tephroleuca +
Thymophylla +
species +
cylindric +
toothed +  and entire +
perennial +  and annual +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
ashy white;ashy white +
shrub +  and subshrub +
lanate +  and tomentose +