Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Malvids: Sapindales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Toxicodendron rydbergii
FAMILY
Anacardiaceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Toxicodendron rydbergii
FAMILY
Anacardiaceae
SYNONYMOUS WITH New manual of vascular plants of northeastern United States and adjacent Canada, digital edition (Naczi & collaborators, 2019)
Toxicodendron radicans var. rydbergii
SYNONYMOUS WITH Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Rhus radicans var. rydbergii
COMMON NAME:
Wesern Poison Ivy
To see larger pictures, click or hover over the thumbnails.
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JK Marlow jkm090425_038
April Pickens County SC
Nine Times Preserve
Leaf lower surface glabrous to sparsely strigose, upper surface glabrous, per Weakley's Flora.
COMPARE
leaves that are trifoliolate and pinnately compound
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Toxicodendron rydbergii
FAMILY
Anacardiaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Toxicodendron rydbergii
FAMILY
Anacardiaceae
SYNONYMOUS WITH
New manual of vascular plants of northeastern United States and adjacent Canada, digital edition (Naczi & collaborators, 2019)
Toxicodendron radicans var. rydbergii
SYNONYMOUS WITH
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Rhus radicans var. rydbergii
2926
Shrub; Forb
Perennial
Habitat: Acid pine-oak forests and woodlands at moderate elevations, per Weakley's Flora
Native: north & northwest of the Carolinas & Georgia
Rare
Click here to see a map, notes, and images from Weakley's Flora of the Southeastern US.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
DOES THE PLANT HAVE "MILKY SAP"?
Has milky sap (latex)
LEAVES:
Deciduous
Odd-pinnately compound: 3 leaflets
Alternate
FLOWER:
Spring/Summer
Greenish-yellow/White
Usually bisexual
4-5 sepals
4-5 petals
4-5 stamens
FRUIT:
Summer/Fall
White/Gray
Drupe
TO LEARN MORE about this plant, look it up in a good book!