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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


Barbara Ertter

Perennial herb, low, ± matted; caudex branched. Leaf: generally basal, generally 1-ternately compound. Inflorescence: cyme; pedicel bractlets 0. Flower: hypanthium shallow, bractlets generally 5; stamens [4]5[10], pollen sac 1, ± horseshoe-shaped; pistils few to many, ovaries superior, styles slender, attached near middle of fruit. Fruit: achene.
6 species: northern hemisphere. (R. Sibbald, Scottish naturalist, physician, 1641–1722)

S. procumbens L.
Plant hairs appressed, generally ± sparse. Stem: 2–15 cm, ± spreading. Leaf: petiole 1–7 cm; leaflets 5–25 mm, ± wedge-shaped, teeth generally 3, at tip. Inflorescence: pedicels generally 3–10 mm, straight. Flower: hypanthium bractlets linear, < sepals; sepals 2–4 mm, triangular; petals ± 1 mm, widely oblanceolate, yellow; stamens 5. Fruit: ± 1 mm, smooth, brown, often retained in disintegrating flower.
n=7. Moist rocky areas; 1820–3700 m (lowest in n). Klamath Ranges, High Cascade Range, High Sierra Nevada, San Bernardino Mountains, Warner Mountains, East of Sierra Nevada; to northeastern North America, arctic; Mexico, Eurasia. Jun–Aug [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 25 2015
Citation for this treatment: [Author of taxon treatment] 2013. Sibbaldia, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 25 2015

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click for enlargement Sibbaldia procumbens
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2007 Dr. Amadej Trnkoczy

Geographic subdivisions indicated for the distribution of Sibbaldia procumbens 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.
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.