Hemp dogbane – Apocynum cannabinum

Field shot of hemp dogbane

Field shot of hemp dogbane

Hemp dogbane flower

Hemp dogbane flower

Hemp dogbane fruit

Hemp dogbane fruit

Hemp dogbane leaf

Hemp dogbane leaf

Hemp dogbane plant

Hemp dogbane plant

Hemp dogbane

Apocynum cannabinum L.
Apocynaceae (Dogbane family)

Life cycle
Erect, patch-forming perennial.

Leaves
Opposite, narrow oval to egg-shaped, 2 to 5 inches long with smooth margins. The upper leaf surface is usually pale to bluish green and smooth; the lower leaf surface may be sparsely hairy. Leaves are smaller than those of common milkweed and exude a milky sap when damaged.

Stems
Erect, up to 6-foot-tall, slender, hairless, reddish stems are herbaceous and multibranched at the top and semiwoody at the base. Stems exude a milky sap when damaged.

Flowers and fruit
Small, white to greenish white, bell-shaped flowers are found in flat- to round-topped clusters. Fruit are 4- to 8-inch-long, narrow, reddish brown, sickle-shaped
capsules that usually occur in pairs. Pods split open at maturity to release small, spindle-shaped seeds, each with a tuft of long, silky hairs that aid in wind dissemination.

Reproduction
Seeds, creeping roots and rhizomes.