药材丹参药材根茎粗短,顶端有时残留茎基。根数条或呈单条,长圆柱形,略弯曲,有的分枝并具须状细根,长10~25 cm,直径0.3~1 cm。表面棕红色或暗棕红色,粗糙,具纵皱纹。老根外皮疏松,多显紫棕色,常呈鳞片状剥落。质硬而脆,断面疏松,有裂隙或略平整而致密,皮部棕红色,木部灰黄色或紫褐色,导管束黄白色,呈放射状排列。气微,味微苦涩。栽培品丹参,根较粗壮,直径可达0.5~1.5 cm。表面红 Radix Salvia medicinal rhizome stubby, the top sometimes residual stem base. Roots of a few or a single, long cylindrical, slightly curved, and some branches with the shape of fine roots, length 10 ~ 25 cm, diameter 0.3 ~ 1 cm. Surface reddish brown or dark brown, rough, with vertical wrinkles. Old roots loose skin, many were purple-brown, often scales flake. Hard and brittle, loose sections, there are cracks or slightly smooth and dense, brown leather, wood yellowish brown or purple-brown, yellow and white duct bundle, radially arranged. Gas micro, slightly bitter taste. Salvia cultivated root more robust, up to 0.5 ~ 1.5 cm in diameter. Red surface