Arizona Naturalists >>> Sycamore Gallery Flora >>> Apocynaceae >>> Apocynum cannabinum

Indian Hemp

Apocynum ×floribundum
[androsaemifolium × cannabinum]

photo © by Mike Plagens

Photographed by Mike Plagens along Sycamore Creek in the Pine Mountain Wilderness, Yavapai Co., Arizona, USA. 07 June 2009. This specimen with the larger, pinker flowers represents a likely hybrid between A. cannabinum and A. androsaemifolium.

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LEAVES: Ten to twenty opposite leaves on many soft, flexible, lateral stems. The leaf margins are smooth. Milky, toxic sap emerges at once from breaks in stems or leaves.

FLOWERS: Small, bell-shaped flowers are white or pinkish and are borne in umbellate clusters.

PERENNIAL: The above ground, often reddish stems are entirely herbaceous. The plant regrows each year with the advent of spring. Most plants are less than one meter tall.

RANGE: In Arizona's sycamore woods this plant tends to occur only in rather moist soil under shade. Otherwise it is distributed into higher elevations such as mesic spots in ponderosa woods and across much of North America.

FRUIT: Each flower develops a pair of pendant seed pods and like most members of this plant family the seeds have long hairs that aid in dispersal.

UNARMED. Without thorns, but sap can be an irritant.

Apocynaceae -- Dogbane Family

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Arizona Naturalist
Sycamore Canyons
The Flora of Arizona's Sycamore Canyons


Copyright Michael J. Plagens, 1999-2010