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©Copyright 1993 by the Regents of the University of California
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ROSACEAE

ROSE FAMILY

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.

NEVIUSIA

SNOW-WREATH

Barbara Ertter

Shrub, ± strigose
Leaves alternate, deciduous; blade shallowly lobed, toothed; stipules linear
Inflorescence umbel-like
Flower: hypanthium flat, bractlets 0; sepals 5–6, ± toothed; petals 0 or 5–6; stamens 50–100+, filaments showy, white, ± expanded; pistils 2–6, ovary superior, strigose, chamber 1, ovule 1
Fruit: achene, wall ± soft
Species in genus: 2 species: CA, se US
Etymology: (Reverend R.D. Nevius, 1827–1913)

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