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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]; monoecious or dioecious.
Stem: generally branched [ fleshy or spiny].
Leaf: generally simple, alternate or opposite, generally stipuled, petioled; blade entire, toothed, or palmately lobed.
Inflorescence: terminal or axillary panicle, raceme or spike, or (Chamaesyce, Euphorbia) a compact unit enclosed by an involucre appearing flower-like, terminal or axillary, 1 or in whorled, umbel-like, or cyme-like arrays.
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.
Seed: 1 per chamber; seed scar appendage sometimes present, pad- to dome-like.
218 genera, 6000+ species: ± worldwide especially tropics; some cultivated (Aleurites, tung oil; Euphorbia species; Hevea, rubber; Ricinus). Many species ± highly TOXIC. [Wurdack & Davis 2009 Amer J Bot 96:1551–1570] Eremocarpus moved to Croton. Tetracoccus moved to Picrodendraceae. —Scientific Editor: Bruce G. Baldwin.
Unabridged references: [Webster 1994 Ann Missouri Bot Gard 81:1–144]
Key to Euphorbiaceae
Annual to subshrub; sap clear; generally monoecious; hairs 0 or generally 2-branched, generally appressed.Key to Ditaxis
Stem: spreading to erect, 1–10 dm.
Leaf: alternate, stipuled.
Inflorescence: raceme, axillary; staminate flowers generally distal to pistillate flowers; axis appressed- to spreading-hairy; bracts entire.
Staminate flower: sepals 5, edges abutting in bud; petals 5; stamens 5–15, generally in 2 sets, some > others, filaments fused into a column, staminodes 0–3 at column tip.
Pistillate flower: sepals 5, overlapping in bud; petals 5; nectar disk ± dissected; ovary 3-chambered, styles 3, 2-lobed.
Seed: surface ± striate to pitted [net-like]; scar not appendaged.
± 50 species: tropics, warm temperate America. (Greek: 2-ranked, from 2 sets of anthers)
Annual or perennial herb.
Stem: 1–3.5 dm, densely appressed-hairy.
Leaf: 1–3.5 cm; stipules 1–1.5 mm, entire; blade lanceolate, ± hairy, entire to faintly toothed.
Staminate flower: sepals 2–2.5 mm; petals ± 2 mm, glabrous; stamen column ± 1 mm.
Pistillate flower: sepals 3–4 mm, abaxially hairy, margin ± entire; petals ± 2.5 mm, lanceolate, glabrous or appressed-hairy, hairs not exceeding petal tip; ovary stiff-hairy, styles free, lobe tips not expanded.
Fruit: 3–4 mm.
Seed: ± 2 mm, angled, pitted.
Slopes, creosote-bush scrub; < 300 m. s edge Mojave Desert, Sonoran Desert;
Previous taxon: Ditaxis lanceolata
Next taxon: Ditaxis serrata
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
Copyright © 2012 Regents of the University of California
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|Bioregions in which taxon occurs||Red area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon;|
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 have georeferencing or identification issues.
Chart based on elevation range in Manual and elevations and coordinates of CCH records.
Data provided by the participants of the Consortium of California Herbaria.
Note: About half of the CCH records include both elevation and coordinates.
|Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria.
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