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.

LYONOTHAMNUS

CATALINA IRONWOOD

Dieter H. Wilken


Species in genus: 1 sp
Etymology: (Greek: Lyon's shrub, W.S. Lyon, early resident of Los Angeles)

Native

L. floribundus A. Gray

Tree, evergreen
Stem: trunk bark gray to reddish brown, peeling in strips
Leaves opposite; stipules deciduous; petiole 1–3 cm; blade dark, shiny green above, ± grayish below
Inflorescence: panicle, generally flat-topped; bractlets 1–3
Flower: hypanthium bell-shaped, tomentose; sepals persistent; petals ± round, white; stamens ± 15; pistils 2, ovary superior, style stout, stigma ± head-like
Fruit: follicles 2, 3–4 mm, woody
Seeds 1–4, ± 2 mm, compressed, brownish
Ecology: Rocky slopes, canyons, oak woodland, chaparral
Elevation: 20–500 m.
Bioregional distribution: Channel Islands.Sspp. hybridize In cultivation.

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