Lobelia sessifolia is a glabrous perennial herb inhabiting
wetlands in fields and mountains; cylindrical and hollow stems grow
to 0.5-1m in height and emerge with no branches. Leaves, which are
sessile, lanceolate, and alternately arranged, measure 4-7cm long,
with sharp tips and finely serrated margins. Flowers, dark purple,
approximately 3 cm in length, bloom in racemes borne on the stem
tops. Bloom time: August-September.