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Oregon woollyheads

slender woollyheads

Habit Plants 1–10 cm. Plants 2–8 cm.
Stems

often much branched from base and clump-forming.

usually much branched throughout, prostrate; clump-forming or spreading; up to 15 cm.

Cauline leaves

3–18 mm, linear or narrowly oblanceolate, mostly 6–12 × as long as wide.

3–12 mm, oblong or oblanceolate to obovate or elliptic, mostly 1.5–6 × as long as wide.

Receptacles

unlobed.

unlobed.

Fruits

cylindric, 0.6–1.2 mm, brown.

obovoid, 0.6–1.2 mm, brown.

Heads

largest 4–6 mm in diameter.

3–5.5 mm in diameter.

Outer paleae

20–80, 1.5–2.7 mm.

25–50, 1.2–2.5 mm.

Inner corollas

0.7–1.4 mm;

lobes usually 4.

0.8–1.5 mm;

lobes usually 5.

Psilocarphus oregonus

Psilocarphus tenellus

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Openings in forests, woodlands, shrublands, grasslands, dry beds of vernal pools. Flowering May–Jul. 100–1900 m. BR, ECas, Sisk, WV. CA, ID, NV, WA. Native.

Grasslands, beaches, riverbanks, sandbars, roadsides, disturbed areas. Flowering May–Aug. 0–1300 m. CR, ECas, Est, Owy, Sisk, WV. CA, ID, WA; north to British Columbia, south to Mexico. Native.

Source Flora of Oregon, volume 2, page 329
Kenton Chambers
Flora of Oregon, volume 2, page 329
Kenton Chambers
Sibling taxa
P. brevissimus, P. elatior, P. tenellus
P. brevissimus, P. elatior, P. oregonus
Synonyms Psilocarphus tenellus var. tenellus
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