Pistachio pistachio, also known as pistachio, has a large and dense inflorescence, with 3-5 male perianth, rectangle, 5-6 stamens, 3-5 female perianth, rectangle, membranous, curly eyelashes at the edge, sessile ovary, rectangle, about 1 mm long, and the style is about 0.5 mm long. Drupe is ovoid or oblong, the stalk is about 3cm long, and the fruit is large, about 2cm long and about 1cm wide, with a sharp apex and a thin tip. Yellow-green to pink at maturity. The flowering period is from March to May, and the fruiting period is from July to August. Small deciduous trees, 5-7 meters high. Branchlets are stout, cylindrical, striped and lenticelled, puberulent or subglabrous, and young branches are usually hairy. Odd-pinnate compound leaves alternate, usually with 3 leaflets, sparse 5 leaflets, flat petiole, wingless or narrow wings, sessile or nearly sessile leaflets, oval or broadly elliptic, 4- 10 cm long and 2.5-6.5 cm wide, with large terminal leaflets, blunt or sharp tips, small tips, wide wedges, rounded or truncated bases and lateral ones.

The fruit is ovoid or broadly ovoid, slightly flat, with a length of 1.3-2.2 cm and a width of 1 cm, brownish yellow to purplish red, with a sharp tip, a truncated base, vestiges of the fruit stalk, slightly twisted edges, intermittent punctate protrusions on the surface, and easy cracking of the peel. The stone is 1.2-2cm long, ovoid or ovoid, sharp and smooth, with a gray tip and a hard shell, and the thickness is about1mm. The seed epidermis is grayish brown or purplish red, and the umbilical cord at the base is rectangular, with a length of about 3mm and a green to light green inside. Slight breath, slightly sweet taste.