Toxicodendron rydbergii

Toxicodendron rydbergii
	Toxicodendron rydbergii
Systematics
Class :	Bedecktsamer (Magnoliopsida)
	Eurosiden II
Order :	Sapindales (Sapindales)
Family :	Sumac family (Anacardiaceae)
Genre :	Toxicodendron
Type :	Toxicodendron rydbergii
Scientific name
	Toxicodendron rydbergii
	( Small ex Rydb. ) Greene

Toxicodendron rydbergii ( English western poison ivy ) is a species of the sumac family. It isnative tomost of Canada from the Maritime Provinces to British Columbia and most of the Continental United States, with the exception of the southeast, as well as New Jersey , Delaware and California .

description

In contrast to the climbing poison sumac ( Toxicodendron radicans , English eastern poison ivy ), which often occurs as a climbing plant, Toxicodendron rydbergii is a shrub about one, rarely three meters in height. The leaves are triply pinnate (trifoliolate) and alternate . The leaflets are variable in size and shape. They are usually six inches long and turn yellow or orange in the fall. The leaflets facing each other on the threefold leaves are typically asymmetrical , in contrast to the terminal leaflet, which is always bilaterally symmetrical . The fruits are small, round and yellowish.

ecology

The species can be found in forests and wooded areas, usually near streams and rivers.

All parts of the plant contain urushiole , which can cause severe allergic eczema in most people .

Systematics

The following synonyms are known:

Rhus rydbergii Small ex Rydb.
Rhus radicans var. Rydbergii (Small ex Rydb.) Rehder
Rhus var. Rydbergii (Small ex Rydb.) Garrett
Toxicodendron radicans subsp. rydbergii (Small ex Rydb.) Á. Löve & D. Löve
Toxicodendron radicans var. Rydbergii (Small ex Rydb.) Erskine

Individual evidence

↑ Toxicodendron rydbergii . United States Department of Agriculture, Natural Resources Conservation Service. Retrieved December 11, 2015.
^ Toxicodendron rydbergii, 2014 county distribution map . Biota of North America Program. Retrieved June 12, 2019.
↑ ^a ^b Robin J. Innes: Toxicodendron radicans, T. rydbergii . In: Fire Effects Information System (FEIS) - Index of Species Information . US Forest Service . 2012. Retrieved June 12, 2019.
^ Per Axel Rydberg: Rhus rydbergii . In: Memoirs of The New York Botanical Garden . 1, 1900, pp. 268-269.
^ Toxicodendron rydbergii (Small ex Rydb.) Greene . Retrieved June 19, 2019.

[1] Toxicodendron rydbergii . United States Department of Agriculture, Natural Resources Conservation Service. Retrieved December 11, 2015.

[2] Toxicodendron rydbergii, 2014 county distribution map . Biota of North America Program. Retrieved June 12, 2019.

[feis-3] Robin J. Innes: Toxicodendron radicans, T. rydbergii . In: Fire Effects Information System (FEIS) - Index of Species Information . US Forest Service . 2012. Retrieved June 12, 2019.

[4] Per Axel Rydberg: Rhus rydbergii . In: Memoirs of The New York Botanical Garden . 1, 1900, pp. 268-269.

[5] Toxicodendron rydbergii (Small ex Rydb.) Greene . Retrieved June 19, 2019.