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Asclepias angustifolia

Asclepias angustifolia Schweigg.

Arizona Milkweed

Asclepiadaceae (Milkweed Family)


USDA Symbol: ASAN5

USDA Native Status: L48 (N)

This species is found only in Arizona. It can be identified by its thin stem, narrow leaves, and small white flowers, in which the horns attach near the base of the hoods. Well-established plants appear to have many stems originating from a common root crown (Webref 20).

Evergreen when growing at low elevation.


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Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Arrangement: Opposite
Leaf Shape: Lanceolate , Linear
Leaf Pubescence: Glabrous
Fruit Type: Follicle
Size Notes: Up to about 28 inches tall.
Leaf: Leaves 1 1/2- 4 1/2 in (4-12 cm) long and 1/32-1/2 in (2-11 mm) broad.
Flower: Flowers are small, approximately 1/8 in (3 mm) wide and 1/8 in (3 mm) long.

Bloom Information

Bloom Color: White , Pink
Bloom Time: Mar , Apr , May , Jun , Jul , Aug
Bloom Notes: Sporadic throughout the year.


Native Habitat: Riparian woodlands, mountains, and canyons.

Growing Conditions

Light Requirement: Sun , Part Shade


Propagation Material: Seeds

Web Reference

Webref 20 - Milkweed Profiles (0) Monarch Watch

Additional resources

USDA: Find Asclepias angustifolia in USDA Plants
FNA: Find Asclepias angustifolia in the Flora of North America (if available)
Google: Search Google for Asclepias angustifolia


Record Modified: 2017-04-20
Research By: DEW

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