Asclepias quadrifolia four-leaved milkweed Asclepiadaceae ASQU; Bx, vc; R (DeCandido 2001);

   

Asclepias quadrifolia (whorled milkweed). By Henry Domke. Published May 22, 2014. Prairie Garden Trust. PGT Nature Garden. pgtnaturegarden.org

Asclepias quadrifolia (whorled milkweed). By Henry Domke. Published May 22, 2014. Prairie Garden Trust. PGT Nature Garden. pgtnaturegarden.org (Accessed 10/2017).

Asclepias quadrifolia is a perennial herb to 50 cm tall, stems slender, mostly unbranched, sap milky, lower stem leafless, upper stem usually with 3 leaf-bearing nodes. 

Leaves of upper and lower nodes opposite, small, middle node with a whorl of four, much larger leaves, blades thin, to 12 cm long, lance to egg-shaped, tip long-pointed, base wedge-shaped. 

Flowers radially symmetrical, petal lobes pale pink to 0.6 cm, hoods white (see Asclepias Genus); inflorescence of umbrella-shaped clusters; June-July. 

Asclepias quadrifolia fruit. Martha Baskin. Nantahala National Forest Natives, NC. blog.jpeg

Asclepias quadrifolia fruit. Martha Baskin. Nantahala National Forest Natives, NC. blog.jpeg (Accessed 10/2017).

Fruit dry, a pod filled with plumed seeds, very slender, to 12 cm long tapered at both ends, held erect on unbent stalks. 

Wetland status: UPL. 

Frequency in NYC: Very infrequent. 

Origin: Native. 

Habitat: Dry, open woods.