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Key to families | Table of families and genera

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ROSACEAE ROSE FAMILY

Daniel Potter & Barbara Ertter, family description, key to genera; treatment of genera by Daniel Potter, except as noted

Annual to tree, glandular or not. Leaf: simple to palmately or pinnately compound, generally alternate; stipules free to fused (0), persistent to deciduous. Inflorescence: cyme, raceme, panicle, cluster, or flowers 1; bractlets on pedicel ("pedicel bractlets") generally 0–3(many), subtended by bract or generally not. Flower: generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, subtending bractlets ("hypanthium bractlets") 0–5, alternate sepals; sepals generally 5; petals generally 5, free; stamens (0,1)5–many, anther pollen sacs generally 2; pistils (0)1–many, simple or compound, ovary superior to inferior, styles 1–5. Fruit: 1–many per flower, achene (fleshy-coated or not), follicle, drupe, or pome with generally papery core, occasionally drupe-like with 1–5 stones. Seed: generally 1–5 (per fruit, not per flower).
110 genera, ± 3000 species: worldwide, especially temperate; many cultivated for ornamental, fruit, especially Cotoneaster, Fragaria, Malus, Prunus, Pyracantha, Rosa, Rubus. [Potter et al. 2007 Plant Syst Evol 266:5–43] Number of teeth is per leaf or leaflet, not per side of leaf or leaflet, except in Drymocallis. —Scientific Editors: Daniel Potter, Thomas J. Rosatti.
Unabridged references: [Robertson 1974 J Arnold Arbor 55:303–332, 344–401, 611–662]

Key to Rosaceae

SANGUISORBA
Perennial herb; hairs 0 or not glandular. Leaf: alternate, odd-1-pinnately compound; leaflets toothed < 1/3 to midvein. Inflorescence: spike, head-like; peduncle long; pedicel bractlets 2, subtended by 1 bract. Flower: bisexual; hypanthium urn-shaped, bractlets 0; sepals generally 4; petals 0; stamens 2–4, filaments not thread-like; pistils 1(2), ovary superior, continuous to style at top, stigma generally ± bushy, exserted. Fruit: hypanthium enclosing achene(s), 4-angled, hard.
2n=28,56.
15 species: northern temperate, arctic. (Latin: blood-absorbing, from styptic properties) Other taxa in TJM (1993) moved to Poteridium, Poterium.
Unabridged references: [Nordborg 1966 Opera Bot 11:1–103]

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Next taxon: Sanguisorba officinalis

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 1 2014
Citation for this treatment: [Author of taxon treatment] 2013. Sanguisorba, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11264, accessed on Sep 1 2014

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