|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, generally ± glandular, generally resinous-smelling; caudex generally branched
Stem generally ascending to erect
Leaves generally basal, odd-1-pinnate, generally ± flat; cauline alternate, reduced upward; uppermost lateral leaflets generally ± fused with terminal
Inflorescence: cyme, open or of dense clusters; pedicels generally straight
Flower: hypanthium a ± flat-bottomed cup, width ± 2 X length; bractlets 5, generally 2/3 sepals; sepals 5, often reflexed; petals 5, generally ± = sepals, blunt, white; stamens 10, filaments flat, often forming a tube; pistils 2many, ovaries superior, styles jointed below fruit tip, ± thicker at base
Species in genus: 19 species: w North America
Etymology: (J. Horkel, German plant physiologist, 17691846)
Data apply to basal leaves, pressed hypanthia.
Plant ± tufted, green to silvery; caudex few-branched; odor indistinctSee the CNPS Inventory for information about endangerment and rarity.
Stem 1550 cm; hairs at base ± 1 mm
Leaf 315 cm, often ± cylindric; leaflets ± 15 per side, crowded, 210 mm, generally divided ± 1/2 to base into < 10 elliptic lobes, hairs many
Inflorescence open; flowers many, ± separate; pedicels generally 16 mm
Flower: hypanthium width 23 mm, 12 X length; bractlets ± 0.5 mm wide, linear-lanceolate; sepals 2.54 mm; petals 35 mm, narrowly obcordate, often pink-tinged; filaments 0.51.5 mm, bases < 0.5 mm wide, anthers ± 0.5 mm; pistils 26, styles ± 1.52 mm
Fruit 22.7 mm
Ecology: UNCOMMON. Dry, rocky serpentine clay, open chaparral or pine forest
Elevation: 601200 m.
Bioregional distribution: w Klamath Ranges
Distribution outside California: sw Oregon
Synonyms: Potentilla howellii Greene
Variation in hairiness, stipule lobing needs study
Horticultural information: DRN, IRR, SUN: 7, 14, 15, 16, 17, 18, 19, 20, 21.