Cnidoscolus angustidens Torr.
Family: Euphorbiaceae
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Cnidoscolus angustidens image
E. Makings  
Plant: perennial herb milky sap; 15 cm-1 m tall from a fleshy rhizome; stinging hairs on stems, leaves, and inflorescences, 4-8 mm long, transparent, each borne on a conspicuous, swollen, whitish base Leaves: more or less round in outline, 8-15 cm in diameter, 3-5-lobed to about the middle, pubescent when young but soon glabrate between the stinging hairs; base broadly cordate; margin incised-dentate with aristate teeth 1-2.5 cm long, sparsely ciliate; petioles 2-10 cm long, with two large yellowish glands at apex; stipules 5-6 mm long, deeply lobed INFLORESCENCE: terminal cymes Flowers: STAMINATE FLOWERS numerous; calyx funnel-shaped, 9-14 mm long, armed with stinging hairs; stamens 10, all connate, with a ring of hairs at the base; staminodes 3, thread-like. PISTILLATE FLOWERS few; sepals oblanceolate to spatulate, 10-12 mm long, with a few stinging hairs; ovary pubescent but glabrate; styles twice-branched Fruit: capsule, 10-12 mm long, the stinging hairs dense. SEEDS 9-11 mm long, 6-7 mm wide, 4-4.5 mm thick, rounded on the back, angled on the inner face, brown, sometimes mottled; caruncle whitish, fleshy, ca. 3 mm wide. Misc: Dry plains and hillsides in grassland, desertscrub, and oak woodland; 1100-1600 m (3600-5200 ft); May-Sep REFERENCES: Levin, Geoffrey A. Euphorbiaceae. Part 1. Acalypha and Cnidoscolus. J. Ariz. - Nev. Acad. Sci. 29(1): 18.
Wiggins 1964, Kearney and Peebles 1969
Duration: Perennial Nativity: Native Lifeform: Forb/Herb General: Robust herb or slightly suffrutescent plant 1.5-12 dm tall from fleshy rhizome with stems, leaves, and inflorescences sparsely to densely armed with stiff stinging hairs 4-8 mm long, each hair surmounting a conspicuous, rounded, whitish pustule. Leaves: Petioles 2-10 cm long, blades orbicular to subreniform in outline, 8-15 cm wide, 3-5 lobed nearly to middle, broadly or shallowly subcordate at base, lobes coarsely incised-dentate, teeth 1-2.5 cm long, blade glabrous between bases of coarse stinging hairs. Papery stipules, whitish, 5-6 mm long. Flowers: Stout peduncles 1-5 cm long, monoecious flowers, staminate in broad cymes to 8 cm wide, staminate calyx white, papery, 9-14 mm long, funnelform, armed with spreading stinging hairs 2-5 mm long; pistillate calyx of 5 distinct, ligulate to oblanceolate segments 10-12 mm long, sparsely hispid with stinging hairs without, early deciduous. Fruits: Capsule 10-12 mm long, hispid. Ecology: Found on plains and hillsides from 2,500-5,000 ft (762-1524 m); flowers May-July. Notes: Notable for its transparent, stinging hairs from conspicuous, white, pustulate bases. Ethnobotany: Unknown Etymology: Cnidoscolus comes from Greek knide or nettle, and skolos, for thorn or prickle, while angustidens means narrow toothed. Synonyms: None Editor: SBuckley, 2010
Cnidoscolus angustidens image
Liz Makings  
Cnidoscolus angustidens image
Liz Makings  
Cnidoscolus angustidens image
Sue Carnahan  
Cnidoscolus angustidens image
Sue Carnahan  
Cnidoscolus angustidens image
Sue Carnahan  
Cnidoscolus angustidens image
Sue Carnahan  
Cnidoscolus angustidens image
Thomas Van Devender  
Cnidoscolus angustidens image
Anthony Mendoza  
Cnidoscolus angustidens image
Melissa Valenzuela  
Cnidoscolus angustidens image
Sue Carnahan  
Cnidoscolus angustidens image
Gertrudes Yanes-Arvayo  
Cnidoscolus angustidens image
Anthony Mendoza  
Cnidoscolus angustidens image
Melissa Valenzuela  
Cnidoscolus angustidens image
Sue Carnahan  
Cnidoscolus angustidens image
Gertrudes Yanes-Arvayo  
Cnidoscolus angustidens image
Anthony Mendoza  
Cnidoscolus angustidens image
Erik Enderson  
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Liz Makings  
Cnidoscolus angustidens image
Trevor Hare  
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
George Yatskievych  
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Liz Makings  
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image
George Yatskievych  
Cnidoscolus angustidens image
Cnidoscolus angustidens image
Cnidoscolus angustidens image