|University of California, Berkeley|
|Directory News Site Map Home|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Annual to shrub, tree [vine, cactus-like succulent]; monoecious or dioecious; sap clear or milky. Stem: generally branched [fleshy or spiny]. Leaf: generally simple, alternate to whorled, generally stipuled, sessile or petioled; blade entire, toothed, or lobed. Inflorescence: flowers solitary or in terminal or axillary cymes, racemes, spikes, or panicles, or (in Euphorbia) 1° inflorescence a compact, flower-like cyathium with much-reduced flowers enclosed within an involucre of fused bracts, cyathia terminal or axillary, 1 or in cyme-like arrays. Flower: unisexual, ± radial; sepals 0 or 2–6, free or fused; petals generally 0(5); stamens 1–many, free or filaments fused; ovary superior, chambers (1)3(4), styles free or fused, undivided, forked, or variously lobed. Fruit: generally capsule that splits into mericarps that then dehisce, releasing seeds. Seed: 1 per chamber; knob-like appendage sometimes present at attachment scar.
217 genera, 6000+ species: ± worldwide especially tropics; some cultivated (Aleurites, tung oil; Euphorbia species; Hevea, rubber; Ricinus). Many species ± highly TOXIC, due primarily to latex, especially if eaten or in contact with skin, eyes. [Yang et al. 2012 Taxon 61:764–789] Eremocarpus moved to Croton, Tetracoccus moved to Picrodendraceae for TJM2; Chamaesyce moved to Euphorbia here (key to genera revised by Thomas J. Rosatti). —Scientific Editor: Bruce G. Baldwin.
Key to Euphorbiaceae
Tree [shrub]; sap milky; monoecious. Stem: branches slender, glabrous. Leaf: cauline, alternate; petiole tip with adaxial pair of large, ± spheroid glands; blade entire, adaxially glabrous, abaxially papillate-glaucous, with 0–few glands near margins. Inflorescence: spike-like panicles or racemes, terminal or axillary, elongate, yellow-green; bracts 1–2 mm, with pair of large glands; pedicels 2–3 mm in ours; pistillate flowers basal, 1/bract; staminate flowers distal or throughout, generally 5–8/bract. Staminate flower: sepals 3, fused; stamens 2 or 3, filaments generally < 1 mm; nectary disk 0. Pistillate flower: sepals 3, fused; nectary disk 0; ovary 3-chambered, styles 3, fused proximally, simple. Fruit: ± spheric or ± 3-lobed, smooth. Seed: ± white, often staying attached to persistent fruit axis.
3 species: native to eastern & southeastern Asia. (Greek: 3, for lobes of calyx, ovary, fruit) [Bower et al. 2009 Inv Plant Sci Managem 2:386–395; Esser 2002 Harvard Pap Bot 7:17–21]
Previous taxon: Tragia ramosa
Next taxon: Triadica sebifera
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Nov 21 2014
Citation for this treatment: [Author of taxon treatment] 2013. Triadica, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=69369, accessed on Nov 21 2014
Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS
View elevation by latitude chart
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records