Jepson eFlora
Key to families | Table of families and genera

Key to Carduus

View taxon page for Carduus

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

1. Phyllaries generally > 2 mm wide; heads generally solitary, conspicuously peduncled; involucre 2–7 cm diam ..... C. nutans

1' Phyllaries generally <= 2 mm wide; heads 1–several, often clustered at branch tips, short-peduncled or sessile; involucre 1–3 cm diam

2. Involucre ± spheric or hemispheric ..... C. acanthoides subsp. acanthoides

2' Involucre cylindric or narrowly ellipsoid

3. Heads generally 2–5 per cluster; phyllaries not scarious-margined, bases ± persistently loosely tomentose, tips scabrous ..... C. pycnocephalus subsp. pycnocephalus

3' Heads 5–20 per cluster; phyllaries scarious-margined, bases glabrous to sparsely tomentose, tips glabrous or barely scabrous, sometimes minutely scabrous-ciliate ..... C. tenuiflorus


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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