OF THE CAROLINAS & GEORGIA

Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Lamiids: Gentianales

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Asclepias longifolia   FAMILY Apocynaceae   Go to FSUS key



SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Asclepias longifolia   FAMILY Asclepiadaceae

SYNONYMOUS WITH Taxonomy of Asclepias hirtella & A. longifolia (Apocynaceae) (Turner, 2009)

Asclepias longifolia var. longifolia

SYNONYMOUS WITH A new combination in Asclepias. Phytologia (Farmer & Bell, 1985)

Asclepias longifolia ssp. longifolia

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 157-01-018:

Asclepias longifolia   FAMILY Asclepiadaceae

(?) Manual of the Southeastern Flora (Small, 1933, 1938)

Acerates floridana

 

COMMON NAME:
Longleaf Milkweed, Savanna Milkweed


         To see larger pictures, click or hover over the thumbnails.

image of Asclepias longifolia, Longleaf Milkweed, Savanna Milkweed

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_acfl4_001_lvd

        

Acerates floridana

image of Asclepias longifolia, Longleaf Milkweed, Savanna Milkweed

JK Marlow    jkm0505q_07

May    Williamsburg County    SC

Leaves numerous, linear, glabrous (to sparsely pubescent along veins beneath), per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Asclepias longifolia, Longleaf Milkweed, Savanna Milkweed

JK Marlow    jkm0505r_31

May    Williamsburg County    SC

Umbels 3+ (rarely solitary), per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Asclepias longifolia, Longleaf Milkweed, Savanna Milkweed

John B. Nelson    jbn_7169194147_1f4ba7138b

July    Berkeley-Charleston Counties    SC

Francis Marion National Forest

image of Asclepias longifolia, Longleaf Milkweed, Savanna Milkweed

Richard and Teresa Ware    rtw_a_longifolia_3

July        

image of Asclepias longifolia, Longleaf Milkweed, Savanna Milkweed

Richard and Teresa Ware    rtw_a_longifolia_3b

July        

Corolla lobes have rose tips; corona horns absent, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Asclepias longifolia, Longleaf Milkweed, Savanna Milkweed

Richard and Teresa Ware    rtw_a_longifolia_5

July        

A. longifolia and A. hirtella are closely related, sometimes treated as varieties or subspecies, per Weakley's Flora (2022).

 

 

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Asclepias longifolia   FAMILY Apocynaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Asclepias longifolia   FAMILY Asclepiadaceae

SYNONYMOUS WITH Taxonomy of Asclepias hirtella & A. longifolia (Apocynaceae) (Turner, 2009)
Asclepias longifolia var. longifolia

SYNONYMOUS WITH A new combination in Asclepias. Phytologia (Farmer & Bell, 1985)
Asclepias longifolia ssp. longifolia

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 157-01-018:
Asclepias longifolia   FAMILY Asclepiadaceae

(?) Manual of the Southeastern Flora (Small, 1933, 1938)
Acerates floridana

 

Find by SCIENTIFIC NAME:

1950

Forb
Perennial

Habitat: Wet pine savannas, per Weakley's Flora

Native to the Carolinas & Georgia

Common (rare in NC)

map
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.

DOES THE PLANT HAVE "MILKY SAP"?
Has milky sap (latex)

LEAVES:
Simple
Opposite or subopposite

FLOWER:
Spring/Summer
Greenish-white w rose tips
Radially symmetrical
5-merous
5-lobed corolla
Superior ovary
Bisexual

Flowers in 3-4 umbels from upper leaf axils

FRUIT:
Summer
Follicle

 

TO LEARN MORE about this plant, look it up in a good book!



 


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