Lobelia rubescens De Wild.

Annual or short-lived perennial herb, decumbent, 10–50 cm. long.. Stems usually many, often rooting at lower nodes, triangular with narrowly winged edges, subglabrous to sparsely pubescent.. Leaves up to 20–50 mm. long and 7–24 mm. wide, narrowly elliptic or lanceolate to ovate, gradually narrowing upwards on the stem, acute or obtuse at the apex, gradually or abruptly narrowing below into a petiole-like base, serrate or crenate, sparsely pubescent on both sides or subglabrous, ciliate at the base; venation prominent beneath.. Flowers in lax leafy racemes; pedicels 10–35 mm. long, shorter than or equalling the bracts, glabrous, with minute bracteoles at the base.. Hypanthium narrowly obonical, 8–10-nerved, glabrous.. Calyx-lobes narrowly triangular to linear, ± spreading or reflexed, 3–6 mm. long, entire, ciliate.. Corolla 6.5–10 mm. long, blue or rarely mauve or violet, split practically to the base on the back, shortly pubescent inside at the bottom of the tube.. Filaments, at least the 2 lower, somewhat pubescent below, connate at least in the upper half, attached to the corolla-tube at the very base.. Anther-tube 1.4–1.6 mm. long, mostly shortly pubescent on the back; 2 lower anthers each with a tuft of hairs and a hyaline appendage at the apex.. Ovary subinferior.. Capsule narrowly obconical, 8–10-nerved, with 2 valves ± 1 mm. long, inferior part of capsule 4–10 mm. long.. Seeds ± broadly elliptic in outline, somewhat compressed, ± 0.5 mm. long, striate, brown.

In marshes.