Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



Annual to tree
Leaves simple to pinnately to palmately compound, generally alternate; stipules free to fused, persistent to deciduous
Inflorescence: cyme, raceme, panicle, or flowers solitary
Flower generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, often with bractlets alternate with sepals; sepals generally 5; petals generally 5, free; stamens (0)5–many, pistils (0)1–many, simple or compound; ovary superior to inferior, styles 1–5
Fruit: achene, follicle, drupe, pome, or blackberry- to raspberry-like
Seeds generally 1–5
Genera in family: 110 genera, ± 3000 species: worldwide, especially temp. Many cultivated for ornamental and fruit, especially Cotoneaster , Fragaria , Malus , Prunus , Pyracantha, Rosa , and Rubus
Reference: [Robertson 1974 J Arnold Arbor 55:303–332,344–401,611–662]
Family description, key to genera by Barbara Ertter and Dieter H. Wilken.


Barbara Ertter

Shrub to vine, often thicket-forming, generally prickly
Leaves generally odd-pinnately compound; stipules generally attached to petiole, generally gland-margined
Inflorescence: generally ± cyme or flowers solitary
Flower: hypanthium urn-shaped; bractlets 0; sepals 5, often with long expanded tip; petals generally 5 (except cultivars), generally pink in CA (white to red or yellow); stamens generally > 20; pistils generally many, ovaries superior, jointed to generally hairy styles
Fruit: bony achenes enclosed in fleshy, generally reddish hypanthium (hip)
Species in genus: 100+ species: generally n temp
Etymology: (Latin: ancient name)
Spp. hybridize freely; other non-natives established locally.


R. minutifolia Engelm.


Dense shrub ± 3–10 dm
Stem gray; prickles many, slender, straight
Leaf: leaflets hairy; terminal leaflet ± 3–6 mm, ± obovate, tip ± obtuse, margins toothed ± 1/2 to midvein, ± glandless
Inflorescence generally 1-flowered; pedicels ± 2–10 mm, hairy, glandless
Flower: hypanthium ± 3 mm wide at flower, densely prickly, neck ± 2 mm wide; sepals glandless, with toothed lateral lobes, tip generally ± = body, toothed; petals ± 10–20 mm; pistils generally ± 10
Fruit ± 5 mm wide
Ecology: Chaparral
Elevation: ± 160 m.
Bioregional distribution: s Peninsular Ranges (Otay Mesa)
Distribution outside California: n Baja California
Horticultural information: In cultivation.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for ROSA%20minutifolia being generated

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