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Tetracoccus hallii

Higher Taxonomy
Family: PicrodendraceaeView Description 

Habit: 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 [3]4--10[12], free [fused], overlapped; petals 0; nectary disk present [0]; stamens [2]5--10[55], filaments free [fused]. Pistillate Flower: +- radial; sepals [3]4--13, free; petals 0; nectary disk present [0]; ovary superior, compound, placentas axile, ovules generally 2 per chamber, styles free [fused]. Fruit: capsule.
Genera In Family: 24 genera, 80 species: tropics, especially southern hemisphere. Note: Incl in (non-monophyletic) Euphorbiaceae in TJM (1993).
eFlora Treatment Author: Bruce G. Baldwin, family description
Scientific Editor: Thomas J. Rosatti.
Genus: TetracoccusView DescriptionDichotomous Key

Habit: Plant generally 0.5--2 m; sap clear. 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.
Species In Genus: 5 species: California, Arizona, Mexico. Etymology: (Latin: 4 seeds, from 4-lobed ovary in Tetracoccus dioicus)
eFlora Treatment Author: Grady L. Webster

Tetracoccus hallii Brandegee
Stem: twigs sparsely short-strigose, glabrous in age. Leaf: generally alternate, generally clustered on short, lateral twigs; blade 2--12 mm, oblanceolate to obovate, entire, tip obtuse to rounded. Staminate Inflorescence: cyme; flowers generally 1--5, generally clustered on short, lateral twigs; pedicel 3--5.5 mm. Staminate Flower: sepals 4--6, +- round; stamens 4--8, filaments 1.5--2.5 mm, glabrous. Pistillate Flower: pedicel 0.5--1(3) mm; sepals generally 5, 2--5 mm, ovate to deltate; ovary generally 3-lobed, dense-, fine-gray-tomentose, chambers (2)3(4), styles 1.5--2 mm. Fruit: 8--12 mm, 6--10 mm wide, fine-tomentose.
Ecology: Rocky slopes, washes; Elevation: < 1200 m. Bioregional Distribution: se DMoj, DSon; Distribution Outside California: western Arizona. Flowering Time: Mar--May
eFlora Treatment Author: Grady L. Webster
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Tetracoccus dioicus
Next taxon: Tetracoccus ilicifolius

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botanical illustration including Tetracoccus hallii


Citation for this treatment: Grady L. Webster 2016. Tetracoccus hallii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 01, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 01, 2016.

Tetracoccus hallii
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© 2010 Steve Matson
Tetracoccus hallii
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© 2009 Keir Morse
Tetracoccus hallii
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© 2010 James M. Andre
Tetracoccus hallii
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© 2010 Steve Matson
Tetracoccus hallii
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© 2012 Neal Kramer
Tetracoccus hallii
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© 2006 Keir Morse

More photos of Tetracoccus hallii in CalPhotos

Geographic subdivisions for Tetracoccus hallii:
se DMoj, DSon;
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.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.