TREATMENT FROM THE JEPSON MANUAL (1993) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY |
Annual, perennial herb, shrub, tree, vine, monoecious or dioecious
Stem generally branched, sometimes fleshy or spiny
Leaves generally simple, alternate or opposite, generally stipuled, petioled; blade entire, toothed, or palmately lobed
Inflorescence: cyme, panicle, raceme, spike; flowers sometimes in clusters (dense, enclosed by involucre, flower-like in Chamaesyce, Euphorbia ), terminal or axillary
Flower unisexual, ± radial; sepals generally 35, free or fused; petals generally 0; stamens 1many, free or filaments fused; ovary superior, chambers 14, styles free or fused, simple or lobed
Fruit: generally capsule
Seeds 12 per chamber; seed scar appendage sometimes present, pad- to dome-like
Genera in family: 300 genera, 7500 species: ± worldwide especially tropical; some cultivated (Aleurites , tung oil; Euphorbia subsp.; Hevea , rubber; Ricinus )
Reference: [Webster 1967 J Arnold Arbor 48:303430]
Many species ± highly TOXIC .
Annual, perennial herb, shrub, tree, monoecious or dioecious; sap clear or colored
Stems generally erect
Leaves generally simple, cauline, alternate; hairs generally stellate
Inflorescence: spike or raceme, generally terminal
Staminate flower generally pedicelled; sepals generally 5; petals 5 or 0; stamens 850(300), filaments free, bent inward in bud; nectar disk generally divided
Pistillate flower: pedicel short or 0, becoming longer in fruit; sepals generally 5, entire to lobed; petals generally 0; nectar disk entire; ovary 3-chambered, styles 2-lobed or toothed
Fruit spheric or 3-lobed, smooth or tubercled
Seeds 1 per chamber, smooth to ribbed or pitted; scar appendaged
Species in genus: 9001000 species: tropical, warm temp, worldwide
Etymology: (Greek: from resemblance of seed to a tick)
Recent taxonomic note: This genus now considered to include Eremocarpus
Native |
Perennial or subshrub < 1 m, dioecious; hairs stellate, scale-like
Leaf: petiole 14 cm; blade 25.5 cm, elliptic to narrowly oblong, tip rounded to obtuse, margin entire
Inflorescence: raceme
Staminate flower: pedicels 15.5(7) mm; petals 0; stamens 1015, filaments hairy
Pistillate flower: pedicel < or = 1 mm, 11.5(3) mm in fruit; sepals ± 2 mm, entire; styles 2-lobed, lobes 2-forked
Seed 3.55.5 mm, smooth
Ecology: Sandy soils, dunes, washes
Elevation: < 900 m.
Bioregional distribution: Central Coast, South Coast, s Channel Islands (Santa Catalina Island), Desert
Distribution outside California: Arizona, Baja California
Synonyms: vars. mohavensis A. Ferg. and tenuis (S. Watson) A. Ferg
Horticultural information: DRN: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24; DFCLT.