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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


Brian Vanden Heuvel & Thomas J. Rosatti

1 sp. (Greek: Chamaebatia-like)

C. millefolium (Torr.) Maxim.
Shrub 6–20 dm, strong-smelling, evergreen, densely branched, generally stellate-hairy, glandular. Leaf: alternate, odd-(1)2-pinnately compound, 2–8 cm, oblong; stipules entire; 1° leaflets 13–25; 2° leaflets 6–10, 0.8–2 mm, sessile, entire, lobed, or toothed; petioles, axes hairy adaxially. Inflorescence: panicle or raceme, 3–15 cm, flowers 20–400; pedicel bractlets 1–21. Flower: hypanthium bractlets 0; sepals 5, 2.5–4 mm, lanceolate, acute, abaxially glandular-hairy; petals 5, ± 5 mm, ± round, white; pistils 4–5, ovaries superior, ± fused below, ovules generally >= 2, styles free. Fruit: follicles, 3–5 mm, red-brown, leathery, dehiscent on inner suture, upper 1/2 of outer. Seed: few, 2.5–3.5 mm, narrow-fusiform, ± yellow.
n=9. Dry, rocky sagebrush scrub, pinyon/juniper woodland, pine forest; 900–3400 m. Klamath Ranges, Cascade Range, Sierra Nevada (e slope), Great Basin Floristic Province, ne Desert Mountains; to Oregon, southern Idaho, Utah, Arizona. Jun–Aug [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 29 2015
Citation for this treatment: [Author of taxon treatment] 2013. Chamaebatiaria, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 29 2015

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click for enlargement Chamaebatiaria millefolium
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2004 Steve Matson

Geographic subdivisions indicated for the distribution of Chamaebatiaria millefolium 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.