Wild basil is a perennial rhizomatous herb with square, upright, hairy stems and opposite pairs of leaves. The leaves are hairy, ovate or lanceolate in shape, and have short or no stalks, wedge-shaped bases and bluntly-toothed margins. The inflorescence is a terminal spike consisting of several loose whorls of clusters of flowers growing in the axils of the leaves. Each flower has a short stalk, five sepals about 10 millimetres (0.39 in) long and five petals 12 to 15 millimetres (0.47 to 0.59 in) in length which are fused into a tube. The flowers are pink, violet or purple and have two lips. Each has four stamens, a long style and fused carpals.
Santa Catalina Mountains
Location: Edge of trail