Lobelia sessifolia is a glabrous perennial inhabiting wetlands
in fields and mountains; the stems, cylindrical and hollow, grow to
0.5-1m, emerge not branches. Leaves, sessile, lanceolate, and
alternately arranged, measures 4-7cm, tips sharp, margins finely
serrated. Flowers, dark purple, approximately 3 cm in length, bloom
in racemes borne on the stem tops. Bloom time: August-September.