Sumac trees and shrubs are in the Rhus genus and are considered to be a part of the Anacardiaceae family, which is known either as the cashew family or the sumac family. Sometimes you will see it spelled as sumach. Many members of this tree family produce an oily liquid called urushiol that can cause allergies. Other familiar members include pistachios (Pistacia vera), cashews (Anacardium occidentale), mangoes (Mangifera indica), purple smoke bush (Cotinus coggygria), and Brazilian pepper trees (Schinus terebinthifolius).
While poison sumac, poison ivy, Atlantic poison oak, and Pacific poison oak are sometimes included in the Rhus genus (as Rhus vernix, Rhus toxicodendron, Rhus pubescens and Rhus diversiloba, respectively), they are often now separated into their own genus—Toxicodendron. They all contain urushiol.
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- Botanical Name: Rhus integrifolia
- Other Common Names: Lemonade sumac, lemonade berry, sourberry
- Native Area: Baja California and Southern California
- USDA Zones: 9 to 10
- Height: Up to 10 feet tall
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- Botanical Name: Rhus lanceolata
- Other Common Names: Limestone sumac, prairie flameleaf sumac, prairie shining sumac, Texas sumac, tree sumac, lance-leaved sumac, flame sumac, young Texas sumac, flame-leaf sumac
- Native Area: North America
- USDA Zones: 6 to 8
- Height: Usually up to 20 feet tall
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- Botanical Name: Rhus trilobata
- Other Common Names: Three-leaf sumac, sourberry, polecat bush, skunkbush, three-lobed sumac, quailbush, aromatic sumac, stinking sumac, squawberry, ill-scented sumac, basketbush, lemita, lemonade sumac, squaw bush sumac, stink-bush, fragrant sumac
- Native Area: Western North America
- USDA Zones: 4 to 8
- Height: 2 to 12 feet tall
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