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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

AMELANCHIER SERVICE-BERRY

Christopher S. Campbell

Shrub, small tree. Stem: bark gray- to red-brown; overwintering buds ovate to lanceolate, ± red to ± purple. Leaf: simple, deciduous; stipules deciduous. Inflorescence: raceme, cluster (panicle), flowers 3–16+; pedicel bractlets generally 1–2. Flower: hypanthium bell- to urn-shaped, bractlets 0; sepals persistent; petals erect to spreading, white (suffused with red); stamens ± 10–20; ovary inferior, 2–5-chambered, styles 2–5. Fruit: pome of 2–5 papery segments, berry-like, generally spheric, generally blue-black.
± 25 species: temperate North America, Eurasia, northern Africa. (Latin: from old French common name) Fruit of some species used by Native Americans for food.
Unabridged references: [Jones 1946 Illinois Biol Monogr 20:1–126]
Unabridged note: Variation in Amelanchier in western North America not studied as extensively as in eastern North America, where hybridization, polyploidy, and apomixis have contributed to considerable taxonomic complexity (Campbell & Wright 1996 Folia Geobot Phytotax 31:345–354; http://biology.umaine.edu/Amelanchier).

Key to Amelanchier

A. alnifolia (Nutt.) M. Roem.
NATIVE
Stem: twigs glabrous. Leaf: blade elliptic to round, generally serrate above middle, glabrous in fruit. Flower: petal ovate to ± round; styles 4–5. [Online Interchange]
Unabridged note: Expanded author citation: Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem.

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Nov 22 2014
Citation for this treatment: [Author of taxon treatment] 2013. Amelanchier, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=12973, accessed on Nov 22 2014

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click for enlargement Amelanchier alnifolia
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Gerald and Buff Corsi 2007 California Academy of Sciences

Geographic subdivisions indicated for the distribution of Amelanchier alnifolia Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.