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Apocynum androsaemifolium - spreading dogbane

Scientific Family
Apocynaceae
Synonyms
Apocynum ambigens , A. androsaemifolium var. glabrum, A. ancrosaemifolum var. griseum, A. androsaemifolium var. incaum and more See SEINET.
Other common names
bitter dogbane
honey bloom
Plant type
Forbs and Subshrubs
Origin
Native
Lifecycle
Perennial
Similar species
A. cannabinum and A. sibiricum
Height
8 to 19-1/2 inches
Riparian
No

Erect or ascending stems emerge from horizontal rootstalks, becoming branched, widely loosely spreading, often with a curve at end; flowers open from the top of the cluster down; at the base of the flower there are organs that secrete nectar.

Erect diffuse branched stems without hairs, milky sap (latex); leaves dark green above, whitish, hairy below; flower petals 5, pinkish with red marks, fused most of their length, spread into very short lobes, sometimes bent back at the tips, fragrant.

Habitat

Found in open to rocky sites, often in higher elevation forests.

Plant Community
Montane Conifer Forest
Low elevation
7000
High elevation
9500

Flower Characteristics

Flowers are grouped in terminal loosely rounded clusters and in the leaf axils; sepals 1/16 to 1/4 inch long; petals to 1/2 inch, broadly bell shaped; with 5 spreading lobes which bend backwards; white to pink with occasional pink or red veins.

Flower color
White to pink
Flower shape
Bell-shaped
Tubular
Yes
First bloom month
June
Last bloom month
August
Flower clusters
Rounded

Leaf and Stem Characteristics

Stems smooth, erect to ascending to 20 inches tall; leaves dark green above with few hairs, denser hairs on undersides making them whitish, egg-shaped to oblong or lance shaped, 3/4 to 2-1/2 inches long, 1/2 to 1-1/4 inches wide; short stems or no stems.

Leaf type
Simple
Leaf color
Dark green, whitish below
Leaf shape
Other
Leaf margin
Smooth
Leaf attachment
Opposite
Leaves clasp
No
Leaf hairs
Leaves
Spines
No

Fruit and Seed Characteristics

Fruit is a narrow, dry follicle (capsule-like but derived from an ovary with a single female reproductive organ, that splits open on 1 side), 1-1/2 to 6 inches long, pendulous, round in cross section, opens at maturity.

Fruit type
Other

Seeds are many, brown, 1/6 to 1/8 inch long with a tuft of brown hairs at the tip.