|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
previous taxon |
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
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)5many, pistils (0)1many, simple or compound; ovary superior to inferior, styles 15
Fruit: achene, follicle, drupe, pome, or blackberry- to raspberry-like
Seeds generally 15
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 55:303332,344401,611662]
Family description, key to genera by Barbara Ertter and Dieter H. Wilken.
Perennial, glandular; odor resinous
Leaves generally basal, odd-1-pinnate, generally ± cylindric; cauline reduced; leaflets generally overlapped, generally divided ± to base
Flower: hypanthium shallow or deep; bractlets (0)5, generally < sepals; sepals generally 5; petals generally 5, acute to rounded; stamens generally < or = 20; pistils 1many, ovaries superior, style jointed below fruit tip, base ± rough-thickened
Species in genus: 30 species: w North America
Etymology: (E. Ives, Yale Univ. pharmacologist, 17791861)
Reference: [Ertter 1989 Syst Bot 14:231244]
Lf and leaflet data are for basal leaves.
Plant rosetted or tufted, silvery-hairy; caudex generally simpleSee the CNPS Inventory for information about endangerment and rarity.
Stem ± decumbent, 1020 cm
Leaf generally 48 cm; sheathing bases densely strigose; leaflets 2535 per side, lobes ± 3, generally 23 mm, elliptic to obovoid; cauline leaves ± 2
Inflorescence: clusters 1several, 1020 mm wide, loosely head-like, < 20-flowered; pedicel < 3 mm (except lowest), ± straight
Flower ± 10 mm wide; hypanthium length = width; petals 24 mm, obovate, white, > sepals; stamens 20, filaments ± flat (unique in Ivesia ); pistils 48
Fruit 22.5 mm, smooth, brown
Ecology: Pebble plains
Elevation: 20002300 m.
Bioregional distribution: San Bernardino Mountains
Distribution outside California: n Baja California (where perhaps distinct)