Asclepias welshii N.& P. Holmgren
Family: Apocynaceae
Welsh's milkweed
Asclepias welshii image
Walter Fertig  
Plant: perennial herb; stems erect or ascending, unbranched, 20-100 cm tall, densely woolly above, glabrate below; milky sap Leaves: opposite, the principal ones with petioles to 7 mm long, the blades (ob)ovate to mostly broadly oblong-elliptic, 6-11 cm long, 4-8 cm broad, rounded at the base, obtuse to mostly rounded-truncate at the apex, apiculate, densely woolly when young, becoming glabrous especially beneath INFLORESCENCE: UMBELS lateral at the upper nodes, compactly-flowered, ca. 3-4 cm broad, the peduncles 2-4 cm long Flowers: large; calyx lobes 6-8 mm long; corolla cream with a rose tinge, the lobes 6-7 mm long; hoods cream, ascending, widening upward to a truncate apex, 3-4 mm long, ca. 2 mm broad at the top, ca. 1 mm longer than the gynostegium, the horns radially flat, attached to about the middle of the hoods, sickle-shaped, abruptly incurved and more or less horizontally exserted 1-1.5 mm over the stigma head; anther wings prominently projected outward near the middle, the upper portion 1.4 mm long, the lower portion slightly shorter; corpusculum 0.4 mm long, the pollinia ca. 1.1 mm long Fruit: FOLLICLES spreading to pendulous on spreading pedicels, 4-7 cm long, bearing soft, subulate tubercles Misc: on sand dunes in sagebrush, juniper, pine, and oak communities; 1700-1900 m (5600-6200 ft); Jun-Jul REFERENCES: Sundell, Eric. 1994. Asclepiadaceae. J. Ariz. - Nev. Acad. Sci. Volume 27, 169-187.
Nabhan et al 2015
Duration: Perennial Nativity: Native Lifeform: Forb/Herb General: This rhizomatous plant, to 1 m, has upright, unbranched stems that are densely woolly with round, compact flowered umbels at upper nodes. Leaves: The leaves are opposite and oval to ovate and densely woolly when young, becoming smooth as they age, especially below. Flowers: Flowers hairy, cream colored with a rose tinge, the hoods cream colored Fruits: Produces pendulous pods that are 1.5 to 3 inches. Ecology: Found on sand dunes in sagebrush, pi-on juniper, and oak communities, from 5,500-6,500 ft (1676-1981 m); flowers May-July. Distribution: Found in very northern Arizona and in extreme southern Utah. Synonyms: None Editor: AHazelton 2015
Asclepias welshii image
Tony Frates  
Asclepias welshii image
Tony Frates  
Asclepias welshii image
Tony Frates  
Asclepias welshii image
Tony Frates  
Asclepias welshii image
Walter Fertig  
The National Science Foundation
This project made possible by National Science Foundation Award 1410069