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Stillingia spinulosa

Higher Taxonomy
Family: EuphorbiaceaeView DescriptionDichotomous Key

Common Name: SPURGE FAMILY
Habit: 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.
Genera In Family: 217 genera, 6000+ species: +- worldwide especially tropics; some cultivated (Aleurites, tung oil; Euphorbia species; Hevea, rubber; Ricinus). Toxicity: Many species +- highly TOXIC, due primarily to latex, especially if eaten or in contact with skin, eyes. Note: Eremocarpus moved to Croton, Tetracoccus moved to Picrodendraceae for TJM2; Chamaesyce moved to Euphorbia here (key to genera revised by Thomas J. Rosatti).
eFlora Treatment Author: Mark H. Mayfield & Grady L. Webster, except as noted
Scientific Editor: Bruce G. Baldwin.
Genus: StillingiaView DescriptionDichotomous Key

Habit: Annual, perennial herb, < 2 m; sap clear or milky; monoecious. Stem: erect. Leaf: alternate, entire or toothed; stipules minute, petioled; blade base generally with 2 glands. Inflorescence: spike, axillary or terminal; bracts glandular. Staminate Flower: calyx 2-lobed; stamens 2; nectary disk 0. Pistillate Flower: sepals 3, overlapping in bud, reduced, or 0; ovary 3-chambered, styles free, fused proximally, lobes 0. Fruit: generally 3-lobed, separating into 3 1-seeded segments; central axis persistent. Seed: pointed; scar not appendaged.
Species In Genus: 30 species: tropics, warm temperate. Etymology: (Benjamin Stillingfleet, British botanist, 1702--1771)

Stillingia spinulosa Torr.
NATIVE
Habit: Annual or perennial herb < 10 dm. Leaf: blade generally 2--4 cm, 5--12 mm wide, elliptic to ovate, sharply toothed. Inflorescence: 1--2 cm, axillary; glands of pistillate bracts stalked, +- 2 mm. Pistillate Flower: 1--2 per inflorescence, +- open; styles 3--3.5 mm. Fruit: 4--5 mm. Seed: 3--3.5 mm, striate, minutely roughened.
Ecology: Sandy soils, dunes, creosote-bush scrub; Elevation: < 900 m. Bioregional Distribution: D; Distribution Outside California: southern Nevada, Arizona. Flowering Time: Mar--May
eFlora Treatment Author: Mark H. Mayfield & Grady L. Webster
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Citation for this treatment: Mark H. Mayfield & Grady L. Webster 2016. Stillingia spinulosa, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=45631, accessed on May 01, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 01, 2016.


Stillingia spinulosa
click for enlargement
© 2012 Keir Morse
Stillingia spinulosa
click for enlargement
© 2012 Keir Morse
Stillingia spinulosa
click for enlargement
© 2012 Keir Morse
Stillingia spinulosa
click for enlargement
© 2004 James M. Andre
Stillingia spinulosa
click for enlargement
© 2004 James M. Andre
Stillingia spinulosa
click for enlargement
© 2012 Keir Morse

More photos of Stillingia spinulosa in CalPhotos


Geographic subdivisions for Stillingia spinulosa:
D;
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.
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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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CCH collections by month

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