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| Hemp dogbane - Apocynum cannabinum L. |
| Home > hemp dogbane |
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| Hemp dogbane leaf. |
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| Young hemp dogbane plant. |
Hemp dogbane flower clusters. |
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| Hemp dogbane fruit. |
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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 bluishgreen 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. |
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Similar weeds: Spreading dogbane
(A. androsaemifolium L.) Differs by having a preference for a drier habitat, usually shorter height, often drooping leaves and more distinct, usually pinkish white flowers. |
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