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.

    THIS PAGE IS NO LONGER UPDATED
    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

ACERACEAE

MAPLE FAMILY

James R. Shevock

Shrubs, trees, sometimes monoecious, dioecious, or with staminate and bisexual flowers
Leaves opposite, generally simple, generally palmately lobed (rarely pinnate), generally deciduous; stipules 0
Inflorescence: panicle, raceme, or umbel-like
Flower small; perianth generally ± yellowish green; sepals (4)5, free; petals generally 5 (sometimes 0, 4, or 6), free, generally sepal-like; stamens generally 8 (sometimes 5, 10, or 12), generally attached to edge of nectary disk; ovary superior, chambers 2, each 2-ovuled
Fruit: generally pair of achenes, conspicuously winged
Seed generally 1 per achene
Genera in family: 2 genera, ± 120 species: n temp, tropical mtns (Dipteronia : 2 species: China). Some Acer important as timber or ornamental, often has bright autumn colors
Reference: [Ogata 1967 Bull Tokyo U For 63:89–206]

ACER

MAPLE


Leaf simple or pinnately compound
Inflorescence: flower clusters drooping, generally appearing before or with emerging leaves
Fruit paired, each with elongate wing ribbed on proximal side
Species in genus: ± 118 species: n hemisphere
Etymology: (Latin name for maple)

Native

A. negundo L. var. californicum (Torr. & A. Gray) Sarg.

BOX ELDER

Tree 6–20 m, dioecious
Stem: twigs hairy, greenish
Leaf pinnately compound; petiole 2–8 cm; leaflets 3–5, central largest, 5–12 cm, 3–5-lobed, toothed
Inflorescence generally appearing before leaves; pistillate pedicels long, drooping
Flower: petals 0
Fruit: body red, finely hairy, becoming straw-colored; wings widely spreading
Ecology: Streamsides, bottomlands
Elevation: < 1800 m.
Bioregional distribution: California Floristic Province.Has been planted widely (especially GV) as ornamental or street tree
Horticultural information: 4, 5, 6; IRR: 1, 2, 3, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24; INV; also STBL.

previous taxon | next taxon
bioregional map for ACER%20negundo%20var.%20californicum being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Acer negundo var. californicum
Retrieve dichotomous key for Acer
Return to treatment index page
Glossary
University & Jepson Herbaria Home Page | Copyright © by the Regents of the University of California