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"
John L. Strother +
(S. F. Blake) Strother +
Dyssodia tephroleuca +
50–100 m +
Light, sandy soils +
Flowering early spring and late summer, following rains. +
Endemic +  and Conservation concern +
Dyssodia sect. Gnaphalopsis +, Dyssodia sect. Hymenatherum +  and Hymenatherum +
Thymophylla tephroleuca +
Thymophylla +
species +