EcoFlora - Ambrosia eriocentra

Ambrosia eriocentra (A. Gray) W.W. Payne
Family: Asteraceae hollyleaf bursage, more... [Franseria eriocentra A. Gray] Liz Makings	FNA Resources John L. Strother in Flora of North America (vol. 21) Shrubs, 30-80(-120+) cm. Stems erect. Leaves mostly alternate; petioles 0-2 mm; blades (± white abaxially) elliptic, lance-linear, or rhombic, 10-40(-60) × 5-15(-40) mm, bases ± cuneate, margins irregularly toothed to ± laciniate, abaxial faces densely strigillose, adaxial faces tomentulose and pilosulous. Pistillate heads clustered, proximal to staminates; florets 1. Staminate heads: peduncles 0-0.5 mm; involucres saucer-shaped to shallowly cup-shaped, 4-8+ mm diam., tomentulose and/or pilose; florets 12-25+. Burs: bodies obconic to fusiform, 3-5+ mm, densely villous and stipitate-glandular, spines 12-20+, scattered or mostly distal, ± subulate, 3-4 mm, tips straight. 2n = 36. Flowering Apr-May(-Jul). Sandy and gravelly washes; 700-1700 m; Ariz., Calif., Nev., Utah.
Open Interactive Map Liz Makings Leslie Landrum Gregory Gust Gregory Gust Gregory Gust Gregory Gust Gregory Gust Gregory Gust Gregory Gust Gregory Gust Mayra V. Madrid Matthew Hulen University of Florida Herbarium University of Florida Herbarium . Eastern Nevada Landscape Coalition Click to Display 100 Initial Images - - - - - View All Images