Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

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.

IVESIA

Barbara Ertter

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

I. lycopodioides A. Gray

CLUB-MOSS IVESIA

Plant rosetted, green; caudex generally simple
Stem decumbent to erect, 3–30 cm
Leaf 1–15 cm; sheathing bases ciliate; leaflets 10–35 per side, overlapped but distinct, lobes 4–10, 1–8 mm, oblanceolate to round; cauline leaf generally 1
Inflorescence: cluster generally 1, 10–20 mm wide, ± dense or head-like, generally < 15-flowered; pedicels generally < 5 mm, straight
Flower 8–15 mm wide; hypanthium length ± < width; petals 2–5 mm, ± obovate, yellow, > sepals; stamens 5; pistils generally 5–15
Fruit 1–1.5 mm, smooth, pale
Ecology: Wet meadows to alpine rocks
Elevation: 2300–4000 m.
Bioregional distribution: High Sierra Nevada, n East of Sierra Nevada, White and Inyo Mountains.Sspp. intergrade.

Native

subsp. lycopodioides


Stem 3–15 cm
Leaf 1–7 cm; lobes ± 1 mm, ± round, ± glabrous, bristle-tip generally 0
Flower: hypanthium length ± 1/2 width; petals 2–3 mm, generally < 2 mm wide, obovate; filaments ± 1 mm; styles 1–2 mm
Chromosomes: 2n=28
Ecology: Rocky areas
Elevation: 3000–4000 m.
Bioregional distribution: n&c High Sierra Nevada, n East of Sierra Nevada (Sweetwater Mtns)
Flowering time: Jul–Aug
Horticultural information: DRN, IRR, SUN: 1, 16, 17; DFCLT.

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