Mahogany Milkweed Flower Mahogany Milkweed Flower Mahogany Milkweed Stem Mahogany Milkweed Leaves Mahogany Milkweed Leaves White undersurface. Box Camp Trail 6/15/17. Mahogany Milkweed Leaves Mahogany Milkweed Plant


Wildflowers of Southern Arizona


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Mahogany Milkweed.
Asclepias hypoleuca.
Dogbane (Apocynaceae) family.

Plant: perennial herb; stems erect, unbranched, 30-100 cm tall, short woolly, especially above. Leaves: opposite, the petioles 3-15 mm long, the blades elliptic-oblong to mostly broadly elliptic or ovate, 4-15 cm long, 2-10 cm broad, obtuse to rounded, truncate or shallowly cordate at the base, broadly acute to rounded at the apex, apiculate, green and glabrous to sparsely hairy above, persistently short woolly beneath, the surface conspicuously whitened from the dense mat of curly hairs. INFLORESCENCE: UMBELS terminal to subterminal or lateral at the uppermost nodes, 5-8 cm broad, the peduncles 2-15 cm long. Flowers: large; calyx lobes 3.5-5 mm long; corolla greenish outside, purplish inside, the lobes 8-11 mm long; hoods purple, erect-ascending, oblong-attenuate, obtuse-rounded at the apex, 6-10 mm long, 4-8 mm longer than the gynostegium, the margins with a pair of sharp teeth ca. 2 mm long arching over the stigma head, the horns absent; anther wings 2-2.4 mm long; corpusculum ca. 0.5 mm long, the pollinia 0.9-1.1 mm long. Fruit: FOLLICLES erect on deflexed pedicels, 8-12 cm long. Misc: Oak and pine woodlands to the ponderosa zone, mts; 1850-2550 m (6000-8300 ft); Jun-Sep.

Santa Catalina Mountains.
Location: Box Camp Trail.
6/23/16

See SEINet Pictures and Description

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