| TREATMENT FROM THE JEPSON MANUAL (1993) |
previous taxon |
next taxon
Jepson Interchange (more information) |
|
|
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
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)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.
Perennial, glandular; odor resinous
Leaves generally basal, odd-1-pinnate, generally ± cylindric; cauline reduced; leaflets generally overlapped, generally divided ± to base
Inflorescence: cyme
Flower: hypanthium shallow or deep; bractlets (0)5, generally < sepals; sepals generally 5; petals generally 5, acute to rounded; stamens generally < or = 20; pistils 1–many, ovaries superior, style jointed below fruit tip, base ± rough-thickened
Fruit: achene
Species in genus: 30 species: w North America
Etymology: (E. Ives, Yale Univ. pharmacologist, 1779–1861)
Reference: [Ertter 1989 Syst Bot 14:231–244]
Lf and leaflet data are for basal leaves.
| Native |
Plant tufted, greenish to white-hairy; caudex 0–few-branched
Stem generally decumbent to ascending, 15–45 cm
Leaf 10–20 cm; sheathing bases densely strigose; leaflets 20–35 per side, lobes 1–4, 3–15 mm, elliptic to oblanceolate; cauline leaves 3–8
Inflorescence open; clusters ± 5–20, 10–20 mm wide, ± head-like, ± 5–10-flowered; pedicels < 3 mm (except lowest), straight
Flower 10–15 mm wide; hypanthium length ± 1–2 X width; petals 4–7 mm, widely obovate to obcordate, white, > sepals; stamens generally 20; pistils 2–7
Fruit 2–3 mm, smooth, brown
Chromosomes: n=14
Ecology: Dry, generally volcanic meadows
Elevation: 1500–2200 m.
Bioregional distribution: n High Sierra Nevada, s Modoc Plateau (Sierra Valley).Plants from Truckee River drainage generally less hairy, inflorescence more open, flower smaller. Related to I. pityocharis Ertter (NV, flatter hypanthium, 8–20 pistils).