Poison Oak Plant Profile
Avoid burning this plant and poison ivy. Identification of poison oak.
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Click on a place name to get a complete noxious weed list for that location or click here for a composite list of all federal and state noxious weeds.
Poison oak plant profile. Poison sumac toxicodendron vernix is a shrub or small tree that can grow as tall as 30 feet. Cleanse the area of contact within the first ten minutes then. Rhus diversiloba commonly named pacific poison oak or western poison oak is a woody vine or shrub in the sumac family anacardiaceae.
In the summertime it looks just like poison ivy with green leaves but in the other three seasons it turns red on the edges. Urushiol is not water soluble. Poison oak belongs to the same genus as poison ivy and poison sumac and it has similar botanical characteristics.
Your best chance at avoiding a reaction is to treat poison oak within 10 minutes of contact. Like poison ivy a single leaf consists of three leaflets or three parted leaves. Poison oak closely resembles poison ivy although it is usually more shrub like and its leaves are shaped somewhat like oak leaves.
Peak flowering occurs in may. The plants database includes the following 7 species of toxicodendron click below on a thumbnail map or name for species profiles. Common names are from state and federal lists.
Best planted in the spring after the last frost sumac grows at a moderate rate. Use strong soaps like dish soap and wash with cold water to keep the oils from spreading. Its stems and leaves contain urushiol a natural oil that causes a severe skin rash any time of the year even in the winter when the shrub has no leaves.
Federal government or a state. It sports medium green leaves in the summer which turn to a red orange in the fall. The undersides of the leaves are always a much lighter green.
Poison oak is not an oak but a low growing deciduous shrub. The plant is native to north america and as. Poison oak is in the same plant family as poison ivy.
This plant is listed by the u s. The stem of the center leaflet is longer than the stem of the leaflets on either side. And one of its defining characteristics is the red color of its stems.
It is widely distributed in western north america inhabiting conifer and mixed broadleaf forests woodlands grasslands and chaparral biomes.
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