Psilocarphus tenellus

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 341. 1840.

Common names: Slender woolly marbles
Treatment appears in FNA Volume 19. Treatment on page 459. Mentioned on page 457, 458, 460.

Plants greenish to grayish, arachnoid to ± sericeous. Stems (1–)2–10, ascending to ± prostrate; proximal internode lengths mostly 1–2(–3) times leaf lengths. Capitular leaves ± spreading, mostly not appressed to heads, spatulate to obovate, widest in distal 1/3, longest 6–15 mm, lengths mostly 2–5 times widths, 1.5–2.5(–3) times head heights. Heads ± spheric, largest 3–5.5 mm. Receptacles unlobed. Pistillate paleae individually visible through indument, longest mostly 1.5–2.7 mm. Staminate corollas 0.8–1.5 mm, lobes mostly 5. Cypselae narrowly obovoid, somewhat compressed, 0.7–1.2 mm.


Phenology: Flowering and fruiting late Mar–early Aug.
Habitat: Dry or seasonally moist, barren to wooded slopes, flats, often disturbed sites (foot paths, road beds, burns), sometimes near vernal pools toward s
Elevation: 0–2100 m

Distribution

V19-764-distribution-map.gif

B.C., Calif., Idaho, Oreg., Wash., Mexico (Baja California).

Discussion

Psilocarphus tenellus is relatively common in the Californian Floristic Province from northwestern Baja California to southwestern Oregon; northward it is scattered to northern Idaho and Vancouver Island, British Columbia. It has been of conservation concern in Canada (J. M. Illingworth and G. W. Douglas 1994b).

Selected References

None.

Lower Taxa

None.
... more about "Psilocarphus tenellus"
James D. Morefield +
Nuttall +
Slender woolly marbles +
B.C. +, Calif. +, Idaho +, Oreg. +, Wash. +  and Mexico (Baja California). +
0–2100 m +
Dry or seasonally moist, barren to wooded slopes, flats, often disturbed sites (foot paths, road beds, burns), sometimes near vernal pools toward s +
Flowering and fruiting late Mar–early Aug. +
Trans. Amer. Philos. Soc., n. s. +
Compositae +
Psilocarphus tenellus +
Psilocarphus +
species +