Toxicodendron rydbergii

taxobox
name = "Toxicodendron rydbergii"
regnum = Plantae
unranked_divisio = Angiosperms
unranked_classis = Eudicots
unranked_ordo = Rosids
ordo = Sapindales
familia = Anacardiaceae
genus = "Toxicodendron"
species = "T. rydbergii"
binomial = "Toxicodendron rydbergii"
binomial_authority = (Small ex Rydb.) Greene|

"Toxicodendron rydbergii" (syn. "Rhus rydbergii"; Western Poison-ivy) is a species of "Toxicodendron" native to most of the United States except the Pacific States, where it can be found growing in forests, and other wooded areas, usually near streams and rivers.USDA Fire Effects Information System: [http://www.fs.fed.us/database/feis/plants/shrub/toxryd/all.html "Toxicodendron rydbergii"] ]

It is a shrub that can grow to 1 m (3 ft) tall, rarely up to 3 m (10 ft). The leaves are trifoliate and alternate. The leaflets are variable in size and shape, and are usually 15 cm (6 in) long, turning yellow or orange in autumn. The fruits are small, round, and yellowish.

Caution

All parts of this plant contain Urushiol, which can cause severe dermatitis in some individuals.

References