|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 rosetted, green; caudex generally simpleSee the CNPS Inventory for information about endangerment and rarity.
Stem decumbent to ascending, generally 515 cm
Leaf 37 cm; sheathing bases strigose; leaflets 48 per side, lobes 512, 310 mm, linear to lanceolate; cauline leaves 2, ± opposite (unique in Ivesia )
Inflorescence: cluster 1, 1550 mm wide, head-like (open in fruit), 515-flowered; pedicels generally 25 mm, straight
Flower ± 10 mm wide; hypanthium length 1/2 width; petals generally 23 mm, oblanceolate, yellow, < sepals; stamens 5; pistils ± 5
Fruit 2.5 mm, ± smooth, light brown, mottled darker
Ecology: Rocky clay in sagebrush flats
Elevation: 15001900 m.
Bioregional distribution: n High Sierra Nevada (Dog Valley, e Sierra Co.), s Modoc Plateau (Sierra Valley)
Distribution outside California: w Nevada