Pilostyles thurberi

A. Gray

Pl. Nov. Thurb., 326. 1854.

Illustrated
Synonyms: Pilostyles covillei Rose
Treatment appears in FNA Volume 6. Treatment on page 184.

Bracts 4–7, imbricate, circular to ovate, 1–1.5 mm. Flowers brown or maroon, 1.5–2 mm; sepals similar to bracts; stylar column with apex expanded to 1 mm diam., papillose along margins; anthers 15–21, in ring of ca. 3 rows; ovules mostly 120–200. Seeds mostly 120–200.2n = 60 + 0–1B.


Phenology: Flowering Jan–May.
Habitat: Open desert scrub
Elevation: 100–1000 m

Distribution

V6 333-distribution-map.jpg

Ariz., Calif., Nev., N.Mex., Tex., Mexico

Discussion

Documented hosts from the flora area are Dalea formosa Torrey, D. frutescens A. Gray, Psorothamnus emoryi Rydberg, and P. polydenius (Torrey) Rydberg (Fabaceae). Other species in these genera apparently serve as hosts in Mexico. The taxonomic limits of Pilostyles thurberi are poorly understood. It is difficult to circumscribe the host range of this taxon.

Selected References

None.

Lower Taxa

None.
... more about "Pilostyles thurberi"
expanded +
expanded +
George Yatskievych +
A. Gray +
circular;ovate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
knoblike +  and convex +
expanded +
Ariz. +, Calif. +, Nev. +, N.Mex. +, Tex. +  and Mexico +
100–1000 m +
undifferentiated +
pistillate +  and staminate +
maroon +  and brown +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Open desert scrub +
expanded +
reduced +
Flowering Jan–May. +
5-carpellate +  and 4-carpellate +
Pl. Nov. Thurb., +
minute +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
5 +  and 4 +
Illustrated +
not sessile +  and achlorophyllous +
Pilostyles covillei +
Pilostyles thurberi +
Pilostyles +
species +