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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Shrub [ tree]; dioecious [ monoecious].
Stem: generally branched.
Leaf: simple [palmate- compound], alternate, opposite, or whorled in 3s; entire or toothed; stipules 0 [present].
Inflorescence: generally axillary [subterminal, terminal].
Staminate flower: ± radial; sepals 4–10, free [ fused], overlapped; petals 0; nectary disk present ; stamens 5–10, filaments free [ fused].
Pistillate flower: ± radial; sepals 4–13, free; petals 0; nectary disk present ; ovary superior, compound, placentas axile, ovules generally 2 per chamber, styles free [ fused].
Seed: 1–2 per chamber, scar generally appendaged [not].
24 genera, 80 species: tropics, especially s hemisphere. Incl in (non-monophyletic) Euphorbiaceae in TJM (1993). —Scientific Editor: Thomas J. Rosatti.
Plant generally 0.5–2 m; sap clear.Key to Tetracoccus
Stem: axis erect; branches generally many, spreading to erect; twigs generally ± red, turning gray, generally hairy, glabrous in age; young lateral twigs short, sometimes becoming spine-like.
Leaf: cauline, generally clustered at short, lateral branch tips; petiole < 2 mm; blade leathery, base obtuse to acute.
Staminate inflorescence: cyme, raceme, or panicle, occasionally clustered on short, lateral twigs, minute-bracted.
Pistillate inflorescence: flower 1.
Staminate flower: sepals 0.5–2 mm; filaments glabrous or hairy; nectary disk ± minute-lobed.
Pistillate flower: sepals 2–5 mm; nectary disk minute-lobed; ovary (2)3–5-chambered, style = chamber in number, free, ± flat, generally spreading.
Fruit: ± spheric, generally lobed, glabrous or short-hairy, generally brown.
Seed: smooth, shiny.
5 species: CA, AZ, Mex. (Latin: 4 seeds, from 4-lobed ovary in Tetracoccus dioicus) [Dressler 1954 Rhodora 56:45–61]
Stem: twigs sparsely and finely brown- tomentose, glabrous in age.
Leaf: generally opposite or 3- whorled; blade 15–30 mm, lanceolate to ovate or wide- elliptic, sharp-toothed, teeth 8–20 per leaf, tip obtuse to acute.
Staminate inflorescence: panicle, ± dense; flowers ± sessile; pedicel << 0.5 mm.
Staminate flower: sepals 7–9, ± linear to lanceolate; stamens 7–9, filaments 2–3 mm, base soft-hairy.
Pistillate flower: pedicel 8–15 mm; sepals 5–8, 2–4 mm, wide- lanceolate to ovate; ovary densely tomentose, chambers 4, styles ± 3 mm.
Fruit: 8–9 mm, 6–8 mm wide, brown- tomentose.
Dry, rocky slopes; 600–1700 m. n Desert Mountains (Grapevine Mtns, Panamint Range).
Previous taxon: Tetracoccus hallii
Next taxon: Pittosporaceae
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].
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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 provide evidence for eFlora range revision or 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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