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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

FRAGARIA STRAWBERRY

Daniel Potter & Barbara Ertter

Perennial herb, ± nonglandular, rhizomes short, stolons leafless. Leaf: basal, 1-ternately compound; leaflet teeth generally entire. Inflorescence: cyme, ± umbel-like, open, 1–several-flowered; pedicels recurved in fruit, bractlets 0. Flower: hypanthium shallow, bractlets 5, narrower than sepals; sepals, petals ± obovate, generally white; stamens 20–35, filaments ± flat, pollen sac 1, horseshoe-shaped; pistils many, ovaries superior, jointed to stout style on side. Fruit: achenes many on enlarged, fleshy, red receptacle.
± 20 species: generally northern temperate. (Latin: fragrant) [Hancock et al. 2004 Canad J Bot 82:1632–1644] Species intergrade.
Unabridged note: Characters include calyx orientation, fruit size used to define subspecies despite evident lack of taxonomic value.

Key to Fragaria

F. virginiana Mill. MOUNTAIN STRAWBERRY
NATIVE
Often dioecious. Stem: 2–12 cm. Leaf: thin; petiole generally 1–25 cm; central leaflet stalk 1–3 mm, blade generally 15–60 mm, obovate, rounded to truncate, teeth generally 7–13, above middle, ± obtuse, central tooth << adjacent; leaflets generally glabrous adaxially, ± hairy abaxially. Inflorescence: < leaves. Flower: ± 10–20 mm wide; hypanthium bractlets unlobed; sepals 3–6 mm; petals 4–9 mm. Fruit: receptacle ± 10 mm; achene ± 1.5 mm.
n=28. Meadows, forest openings; generally 1200–3300 m. Klamath Ranges, High Cascade Range, High Sierra Nevada, Modoc Plateau; to eastern North America. May–Aug [Online Interchange]

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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 18 2014
Citation for this treatment: [Author of taxon treatment] 2013. Fragaria, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=26026, accessed on Sep 18 2014

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click for enlargement Fragaria virginiana
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© 2005 George Rembert

Geographic subdivisions indicated for the distribution of Fragaria virginiana 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.