Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
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 3–5, free or fused; petals generally 0; stamens 1–many, free or filaments fused; ovary superior, chambers 1–4, styles free or fused, simple or lobed
Fruit: generally capsule
Seeds 1–2 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 48:303–430]
Many species ± highly TOXIC .
Annual, perennial herb, < 2 m, monoecious; sap clear or milky
Stems erect
Leaves alternate, simple, entire or toothed; stipules minute, petioled; blade base generally with 2 glands
Inflorescence: spike, axillary or terminal; bracts glandular
Staminate flower: calyx 2-lobed; petals 0, stamens 2; nectary disk 0
Pistillate flower: sepals 3 (overlapping in bud), reduced, or 0; petals 0; ovary 3-chambered, styles free, fused below, lobes 0
Fruit generally 3-lobed, separating into 3 1-seeded segments; central axis persistent
Seeds pointed; scar not appendaged
Species in genus: 30 species: tropical, warm temp
Etymology: (Latin: Benjamin Stllingfleet, British botanist, 1702–1771)
Reference: [Johnston & Warnock 1963 Southw Naturalist 8:100–106]
| YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps). |
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