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Key to families | Table of families and genera

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 herb 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 northern 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; North Coast ..... var. macrophyllum

3' Pedicel glandular; upper stem leaves compound or simple, divided ± to base; Northwestern California (except North Coast), High Cascade Range, High Sierra Nevada, San Bernardino Mountains, Great Basin Floristic Province ..... 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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