FSEEC_150D

Poison Ivy

Scientific Name     

Toxicodendron radicans   L.  Kuntze

Family Name

Anacardiaceae   (Sumac/Cashew family)

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flower

flower spurs

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vine

habitat















Characteristics: 

Habitat: 

open woods, disturbed areas, fence rows, nearly anywhere

Plant Height: 

woody, climbing, straggling vine; abundant aerial roots

Flower Color: 

yellow to green

Flower: 

complete; imperfect; 5 green sepals with yellow margins; staminate flowers with 5 stamens that alternate with 5 petals; pistillate flowers with superior ovary, style 3-lobed, occasionally with staminal vestiges

Inflorescence: 

axillary clusters; plants dioecious

Fruit: 

gray or whitish

Leaves: 

compound; alternate; three leaflets, terminal leaflet typically with long petiole; entire or slightly toothed; elliptical to oblong

Bloom Time: 

May-July

Origins: 

native

Other: 

synonym Rhus radicans L.; Toxicodendron means "poison tree"; while not a wildflower, recognition of this species is important since many people are allergic to the oil (urushiol) present in all parts of the plant year round; Gleason and Cronquist, 1991, recognize two variations, var. radicans puberulent which has scabrous or papillose fruits, var. negundo (Greene) Reveal has glabrous fruits or with a few scattered hairs, leaves generally toothed