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one-flowered goldenweed, plantain goldenweed

Habit Plants 7–35 cm.
Stems

erect or ascending, lightly to densely villous-tomentose.

Basal leaves

narrowly elliptic to broadly linear, 3–12 cm × 3–15 mm;

margins denticulate to sharply dentate, rarely entire;

surfaces glabrous or villous-tomentose.

Cauline leaves

linear to narrowly lanceolate;

margins entire, sessile.

Involucres

7–12 mm.

Ray florets

20–50, conspicuous;

corollas 7–11 mm.

Disc florets

30–60;

corollas 5–8 mm.

Phyllaries

in 3–6 series, linear or narrowly oblanceolate;

margins ciliate;

surfaces glabrous to tomentose.

Fruits

2–4 mm, brown, pubescent;

pappus bristles 5–7 mm.

Heads

1(2), radiate;

peduncles 10–100 mm.

2n

=12.

Pyrrocoma uniflora

Distribution
[WildflowerSearch map]
[BONAP county map]
Discussion

Forests, shrublands, grasslands, meadows, ridges. Flowering May–Jul. 1000–1900 m. BR, Owy. CA, ID; north to Northwest Territories, east to WY, southeast to CO. Native.

Source Flora of Oregon, volume 2, page 332
Kenton Chambers
Sibling taxa
P. carthamoides, P. hirta, P. howellii, P. lanceolata, P. racemosa, P. radiata, P. scaberula
Synonyms Haplopappus uniflorus, Haplopappus uniflorus ssp. uniflorus, Haplopappus uniflorus var. uniflorus, Pyrrocoma uniflora var. uniflora
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