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Key to families | Table of families and genera

This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press.

Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

GEUM

Joseph R. Rohrer


Perennial from thick caudex or elongate rhizome.
Stem: ascending to erect, generally hairy.
Leaf: generally basal, generally odd-1-pinnately compound, upper cauline simple or not; leaflets lobed, alternately large, small, teeth uneven.
Inflorescence: generally cyme, open; pedicel bractlets 0.
Flower: hypanthium shallow, bractlets generally 5; stamens > 20; pistils many, ovary superior, continuous to style.
Fruit: achene, ovoid to fusiform, ± flat; style elongated, persistent.
40–50 species: generally n temperate, arctic. (Latin: ancient name)

Key to Geum

1. Style in fruit 15–40 mm, plumose, not or inconspicuously hooked; flowers nodding, ± cup-shaped; petals cream to pale yellow, pink-tinged or purple-veined, persistent; hypanthium bractlets 5–15 mm ..... G. triflorum var. ciliatum

1' Style in fruit 2–9 mm, not plumose, hooked; flowers generally erect, rotate; petals yellow, deciduous; hypanthium bractlets <= 4 mm

2. Hypanthium bractlets 2–4 mm; style in fruit with few bristles at base, nonglandular; plant drying black-green ..... G. aleppicum

2' Hypanthium bractlets generally 0 or <= 2 mm; style in fruit without bristles, generally glandular; plant drying ± green ..... G. macrophyllum

3. Pedicel nonglandular; upper stem leaves simple, divided < 3/4 to base; NCo ..... var. macrophyllum

3' Pedicel glandular; upper stem leaves compound or simple, divided ± to base; NW (except NCo), CaRH, SNH, SnBr, GB ..... var. perincisum

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [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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