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Asclepias longifolia (Longleaf milkweed)
Romfh, Peggy

Asclepias longifolia

Asclepias longifolia Michx.

Longleaf Milkweed

Asclepiadaceae (Milkweed Family)

Synonym(s): Acerates delticola, Acerates floridana, Acerates longifolia

USDA Symbol: aslo

USDA Native Status: L48 (N)

Herbaceous perennial with slender, unbranched, slightly pubescent, stem; 8-28 inches tall. Alternate, numerous, sessile leaves; linear to narrowly lanceolate and pointed upward; 2 3/8-7 1/4 inches long and 3/8 inches wide. Inflorescences are several to many, solitary umbels, terminal or lateral from upper nodes. The flowers are 5-parted with greenish white corollas tinged in purple, reflexed and 1/4 inch long; anthers united with the stigma; hoods 0.08 inches long and without horns. Fruit is an erect follicle, 3-4 3/4 inches long, 3/8 inch diameter with many seeds with tufts of white hair. (Bibref 1295) (Bibref 824) (Webref 24)


From the Image Gallery

13 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Arrangement: Opposite
Leaf Complexity: Simple
Inflorescence: Umbel
Fruit Type: Follicle

Bloom Information

Bloom Color: White , Green , Purple
Bloom Time: May , Jun , Jul , Aug


USA: AL , AR , DE , FL , GA , LA , MD , MS , NC , SC , TX , VA , WV
Native Habitat: "Swamps, savannas, flatwoods and low pinelands." (Bibref 824)

Value to Beneficial Insects

Special Value to Native Bees
Special Value to Bumble Bees
Special Value to Honey Bees
Supports Conservation Biological Control

This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Crosby Arboretum - Picayune, MS

Web Reference

Webref 24 - Identification of Milkweeds in Texas (2015) Texas Parks and Wildlife Department

Additional resources

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


Record Modified: 2017-08-29
Research By: TWC Staff, NH

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