Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

Home to the plants of the Sonoran, Chihuahuan and Mojave Deserts

Cirsium ochrocentrum, Yellowspine Thistle

Asclepias angustifolia, Arizona Milkweed

Asclepias angustifolia, Arizona MilkweedAsclepias angustifolia, Arizona MilkweedAsclepias angustifolia, Arizona MilkweedAsclepias angustifolia, Arizona MilkweedAsclepias angustifolia, Arizona Milkweed


Scientific Name: Asclepias angustifolia
Common Name: Arizona Milkweed
Also Called: Milkweed, Narrow-leaved Milkweed (Spanish: Talayote)
Family: Asclepiadaceae, Milkweed Family
Synonyms: (Asclepias linifolia, Gomphocarpus angustifolius, Gomphocarpus fruticosus)
Status: Native
Duration: Perennial
Size: Up to 2 feet or more.
Growth Form: Forb/herb;
Leaves: Green; linear, distinctively short petioled, mostly in pairs.
Flower Color: Whitish-pink;
Flowering Season: June to July.
Elevation: 4,000 to 5,000 feet.
Habitat Preferences: Arroyos, canyons, along streambeds, hilly slopes.
Recorded Range: Arizona Milkweed is rare in the United States. It is found only in Arizona in the far southern part of the state in Cochise (Huachuca Mountains), Pima (Santa Catalina Mountains) and Santa Cruz (Bear Valley and Sycamore Canyon) counties.

North America & US County Distribution Map for Asclepias angustifolia.

U.S. Weed Information: No information available.
Invasive/Noxious Weed Information: No information available.
Wetland Indicator: No information available.
Threatened/Endangered Information: No information available.

Genus Information: In North America there are 76 species and 91 accepted taxa overall for Asclepias. World wide, The Plant List includes 215 accepted species names and includes a further 122 infraspecific rank for the genus.

In the Southwestern United States: Arizona has 29 species of Asclepias, California has 18 species, Nevada has 13 species, New Mexico has 26 species, Texas has 38 species, Utah has 17 species. All data is approximate and subject to taxonomic changes.

Comments: Arizona Milkweed is a rare plant in the United States. It is often visited by bees, butterflies and other insects.

Also see in Southwest Desert Flora; Antelope Horns Milkweed, Asclepias asperula, Mexican Butterfly Weed, Asclepias curassavica, Dwarf Milkweed, Asclepias involucrata, Pineneedle Milkweed, Asclepias linaria, Rush Milkweed, Asclepias subulata and Horsetail Milkweed, Asclepias subverticillata.

Date Profile Completed: 11/08/2105, updated 11/21/2105, updated 10/17/2016
References:
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search - (accessed 10/16/2016)
https://plants.usda.gov/java/ClassificationServlet?source=display&classid=ASCLE
The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 10/16/2016).
http://www.theplantlist.org/1.1/browse/A/Apocynaceae/Asclepias/
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles, California.
NatureServe Explorer, Ecology and Life History; (accessed 11/07/2105)
http://explorer.natureserve.org/servlet/NatureServe?searchName=Asclepias+angustifolia
SEINet for synonyms, scientific names, recorded geographic locations and general information
http://swbiodiversity.org/seinet/.