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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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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
1 sp. (Count F.P. Lütke, Russian sea captain, 1797–1882)
Subshrub 5–25 cm, ± prostrate or long-trailing to decumbent; not glandular. Leaf: ± 2-ternately dissected, ± sessile, stipules 0; leaf 5–15 mm; segments linear, generally acute, ribbed abaxially, grooved adaxially. Inflorescence: raceme, terminal, 1–10 cm, narrow; bracts ternately dissected; pedicel bractlets 0. Flower: hypanthium hemispheric, bractlets 0; sepals ± 2 mm, ovate; petals ± 3 mm, ± obovate, white; stamens ± 20; ovaries 4–6, free, superior. Fruit: follicles 4–6, ± 4 mm, leathery, sparsely hairy, dehiscent along both sutures. Seed: > 1, ± fusiform, flat, smooth.
Moist slopes, often near snow, conifer forest; 1800–2800 m. Klamath Ranges, High Cascade Range; to Alaska. Jun–Sep [Online Interchange]
Previous taxon: Luetkea
Next taxon: Lyonothamnus
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 9 2014
Citation for this treatment: [Author of taxon treatment] 2012. Luetkea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=31669, accessed on Mar 9 2014
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