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.


Margriet Wetherwax

Shrub, ± resinous
Stem: bark shredding
Leaves simple, alternate or clustered, evergreen, short-petioled, stipuled or not, ± linear, stiff
Inflorescence: panicle, terminal, 4–15 cm; bracts generally < calyx, ± lanceolate
Flower: hypanthium 1–1.5 mm, ± = sepals, obconic, persistent, enclosing fruit; calyx lobes 1–1.5 mm; corolla lobes ± round, cream to white; stamens 10–15 in clusters alternate petals; ovary superior, chamber 1, ovules 1–2
Fruit: achene
Species in genus: 2 species: CA, Baja CA
Etymology: (Greek: glandular mouth, from hypanthium glands)


A. sparsifolium Torr.


Shrub or tree-like, 2–6 m
Stem: trunk bark red-brown; twigs glabrous
Leaves 4–15 mm, not clustered; stipules 0
Inflorescence < 15 cm, open; bracts narrowly ovate, papery; pedicels 0–4 mm
Flower: hypanthium 5-ribbed, nonglandular; corolla lobes ± 2 mm; ovary truncate
Chromosomes: 2n=18
Ecology: Dry slopes, flats, chaparral
Elevation: 300–2000 m.
Bioregional distribution: s Central Coast, s Outer South Coast Ranges, Transverse Ranges, Peninsular Ranges
Distribution outside California: Baja California
Horticultural information: DRN, SUN, DRY: 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.

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