|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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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 tufted, silvery; caudex generally simple
Stem ascending to erect, generally 515 cm
Leaf 25 cm, mousetail-like; sheathing bases densely strigose; leaflets 2540 per side, indistinct, lobes ± 3, < 1 mm, obovate to round; cauline leaf 1, generally ± bract-like
Inflorescence: clusters 1few, 1015 mm wide, head-like, generally 1020-flowered; pedicels ± < 2 mm, straight
Flower ± 5 mm wide; hypanthium length 1/21 X width; petals 12 mm, narrowly oblong to oblanceolate, pale yellow, ± = sepals; stamens 5; pistils 14
Fruit ± 2 mm, smooth, gray spotted red
Ecology: Rocky areas
Elevation: 29004000 m.
Bioregional distribution: c&s High Sierra Nevada.Apparently hybridizes with I. lycopodioides.