Asclepias angustifolia – Arizona Milkweed

Asclepias angustifolia - Arizona Milkweed

Asclepias angustifolia - Arizona Milkweed

Plant Name

Scientific Name: Asclepias angustifolia

Common Name: Arizona Milkweed

Plant Characteristics

Duration: Perennial

Growth Habit: Herb/Forb

Arizona Native Status: Native

Habitat: Riparian. It grows in riparian woodlands and in low to mid-elevation mountain canyons.

Flower Color: Pure white or purplish white

Flowering Season: Spring (late), Summer

Height: To 28 inches (71 cm) tall

Description: The flowers are in umbels at the stem tips. Each flower is up to 1/2 inch (1.3 cm) across and has 5 reflexed petals and a hooded central column. The leaves are green, opposite, and linear to narrowly lance-shaped. The stems are erect.

The similar Horsetail Milkweed (Asclepias subverticillata) and Whorled Milkweed (A. verticillata) have narrower, whorled (not opposite) leaves.


Kingdom: Plantae – Plants
Subkingdom: Tracheobionta – Vascular plants
Superdivision: Spermatophyta – Seed plants
Division: Magnoliophyta – Flowering plants
Class: Magnoliopsida – Dicotyledons
Subclass: Asteridae
Order: Gentianales
Family: Asclepiadaceae – Milkweed family
Genus: Asclepias L. – milkweed
Species: Asclepias angustifolia Schweigg. – Arizona milkweed

More About This Plant

Arizona County Distribution Map