Sumac, also spelled sumach, is any one of about 35 species offlowering plantsin thegenusRhus and related genera in the familyAnacardiaceae. Sumacs aredioeciousshrubsand smalltreesin the familyAnacardiaceaethat can reach a height of 1–10 m (3.3–32.8 ft). Theleavesare usuallypinnately compound, though some species have trifoliate or simple leaves. Theflowersare in densepaniclesor spikes 5–30 cm (2.0–11.8 in) long, each flower very small, greenish, creamy white or red, with five petals. Thefruitsare reddish, thin-flesheddrupescovered in varying levels of hairs at maturity and form dense clusters at branch tips, sometimes called sumac bobs.