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|Family: Euphorbiaceae||View Description||Dichotomous Key|
|Genus: Euphorbia||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Euphorbia crenulata Engelm.
Habit: Annual (biennial), glabrous. Stem: ascending to erect, 1.2--6 dm. Leaf: proximal cauline alternate, proximal-most petioled; stipules 0; blade 1.5--3.5 cm, elliptic to oblanceolate or +- spoon-shaped, entire to finely crenate, base tapered, tip obtuse to abruptly pointed; distal cauline alternate or distal-most in a single whorl. Inflorescence: 1° inflorescence branches in umbel-like cluster of 3 from axils of whorled leaves, also often from axils of distal alternate leaves; cyathia in leafy-bracted cyme-like clusters; bracts opposite, sessile, fused into disk, triangular-ovate, entire; involucre 2 mm, bell-shaped; glands 4(5), 1--2 mm, transversely crescent-shaped, with 2 narrow, tapered horns; petal-like appendage 0. Staminate Flower: 10--20. Pistillate Flower: styles forked < 1/2. Fruit: 3--3.5 mm, oblong, lobed. Seed: 2--2.5 mm, oblong-ellipsoid, +- round (in ×-section), surface net-like; knob present.
Ecology: Common. Dry places; Elevation: < 1600 m. Bioregional Distribution: CA-FP; Distribution Outside California: Oregon, southern Colorado, northern New Mexico. Flowering Time: Mar--Aug
eFlora Treatment Author: David J. Keil, Thomas J. Rosatti, Mark H. Mayfield & Daryl Koutnik
Jepson Online Interchange
Previous taxon: Euphorbia arizonica
Next taxon: Euphorbia cyathophora
Citation for this treatment: David J. Keil, Thomas J. Rosatti, Mark H. Mayfield & Daryl Koutnik 2016. Euphorbia crenulata, Revision 1, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=25535, accessed on May 31, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 31, 2016.