OregonFlora species comparison

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Hymenoxys cooperi

(synonym of Hymenoxys lemmonii)

Cooper's golden-flower, Cooper's rubberweed, ragged rustlers
Habit Plants biennial or perennial, 1–4 dm.
Stems

canescent-puberulent.
Leaves

1.5–10 cm, usually 2–6-lobed;

surfaces canescent-puberulent or villous;

lobes linear;

petioles not winged.
Involucres

4–9 mm;

surfaces glabrous or villous;

gland-dotted.
Ray florets

8–13;

corollas 1–2 cm, yellow.
Disc florets

30–100+;

corollas 2.5–4.5 mm, yellow; well exserted.
Fruits

obpyramidal, 1.5–3.5 mm; black;

veins indistinct, strigose;

pappi 1.5–3.5 mm; silvery.
2n

=30.

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

Brushlands, grasslands, ridge tops, slopes, flats. Flowering May–Aug. 1400–1800 m. BR. CA, ID, NV; southeast to AZ. Native.

If subspecific taxa of this species are recognized, ours would refer to variety canescens.
Source Flora of Oregon, volume 2, page 293
Kenton Chambers
Sibling taxa
H. cooperi, H. hoopesii
Synonyms Hymenoxys cooperi var. canescens, Hymenoxys lemmonii
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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