I"ve been an amateur botanist since circa 1997 with a special interest in California native plants. A corollary passion of mine is birding and, like many fellow birders, I keep a Life List of all the bird species that I've observed in my lifetime. So I thought, why not also create a life list for plants I've seen in the field? In addition to California natives, I've also included a smaller list of plants that I've observed and photographed in their native habitats outside of the U.S.
Monday, April 25, 2016
Euphorbia albomarginata (Rattlesnake Weed, Rattlesnake Sandmat)
4/27/01 Black Canyon Road north of Mid Hills, Mojave National Preserve (East Mojave),
San Bernardino County, CA
4/3/17 CA 190W between Emigrant and Towne Pass, Death Valley National Park, Inyo County, CA
5/24/98 Desert Tortoise Natural Area, Western Mojave, E. Kern County, CA
LIFE LIST NOTES: COMMON NAME: Rattlesnake Weed, Whitemargin Sandmat
SPECIES: Euphorbia albomarginata FAMILY: Euphorbiaceae (Spurge Family)
LIFE LIST DATE: 5/24/1998
LOCATION: Desert Tortoise Natural Area, Western Mojave, E. Kern County, CA
Leaf: opposite throughout, 2-ranked, subsessile; stipules fused into wide, membranous, ciliate scale; blade 3--8 mm, round to oblong, entire, base asymmetric, tip obtuse.
Inflorescence: cyathia generally 1 per node; involucre < 2.5 mm, bell-shaped to obconic; glands 4, < 1 mm, transversely oblong; petal-like appendage wider than gland, entire to slightly scalloped, white.
Staminate Flower: 15--30.
Pistillate Flower: styles forked 1/2--3/4.
Fruit: 2--2.5 mm, ovoid, angled, glabrous.
Seed: 1--2 mm, oblong, 4-angled, smooth, white; knob 0.
Ecology: Common. Dry slopes; : < 2300 m.
Bioregional Distribution: s SnJV, SW, D;
Distribution Outside California: to Utah, Texas, Mexico.
Flowering Time: Apr--Nov
eFlora Treatment Author: David J. Keil, Thomas J. Rosatti, Mark H. Mayfield & Daryl Koutnik