Jepson eFlora
Key to families | Table of families and genera

Key to Chrysothamnus

View taxon page for Chrysothamnus

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Involucre 9–15 mm; fruit glabrous or with few glandular hairs; style appendages ± = stigmatic portion ..... C. depressus

1' Involucre 4–10 mm; fruit moderately to densely hairy; style appendages generally < stigmatic portion

2. Heads generally overtopped by distal leaves; flowers 2–3(4); style branches generally not exserted beyond spreading corolla lobes; lower phyllaries leaf-like and >= rest of involucre ..... C. humilis

2' Heads not overtopped by distal leaves (occasionally distal may reach into inflorescence but not beyond); flowers 3–5(14); lower phyllaries ± green but << rest of involucre; style branches exserted beyond spreading corolla lobes.

3. Leaves thread-like, 0.5–2 mm wide; phyllary tips acuminate to rigidly short-pointed; flowers 4–5 ..... C. greenei

3' Leaves thread-like or linear to oblong or (ob)lanceolate, 0.5–10 mm wide; phyllary tips acute to obtuse or rounded; flowers 3–14 ..... C. viscidiflorus

4. Distal stems and often leaves hairy

5. Stem ± green, bristly hairy; leaves green, 2–6 mm wide, rough-hairy especially abaxially, sometimes glabrous adaxially, 3–5-veined ..... subsp. lanceolatus

5' Stem and leaves gray-green, puberulent; leaves 1–2(4) mm wide; 1-veined (sometimes 3-veined proximally) ..... subsp. puberulus

4' Stem glabrous; leaf faces glabrous, margins ± ciliate

6. Leaves 0.5–1 mm wide; flowers 3–4(5); involucre ± obconic ..... subsp. axillaris

6' Leaves 1–10 mm wide; flowers 4–14; involucre narrowly cylindric ..... subsp. viscidiflorus


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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