Lobelia pachytricha

Dioecious, prostrate to decumbent, glabrous, mat-forming perennial; stems rooting at nodes. Leaves ovate to orbicular, 2–13 mm long, 1.5–10 mm wide, margins 1–5-toothed on each side, base obtuse; petiole 0–2.5 mm long. Flowers irregularly spaced, male, female and bisexual flowers superficially similar, but females slightly smaller; pedicels 3–100 mm long, glabrous, often recurved in fruit. Calyx-lobes 0.8–3 mm long, entire or with a rudimentary tooth on each side toward the base; corolla fan-shaped, 4–9 mm long (females to 7.5 mm long), blue to blue-mauve, becoming paler or whitish toward base, with 2 yellowish-green bands entering throat of tube; upper 2 lobes distinctly (rarely only slightly) narrower and/or more deeply cleft, elliptic to oblanceolate-obovate, 2–6 mm long, 1–2.2 mm wide, lower lobes to 2.8 mm wide, lobes acute to abruptly tapered and shortly acuminate or cuspidate; tube 2–4 mm long, split to within c. 0.7 mm or less of base, glabrous or with fine retrorse hairs internally towards base; filaments 1.7–2.7 mm long, anther tube 1–1.3 mm long in male flowers and dorsally with rows of thick, subacute to obtuse hairs c. 0.1 mm long, 0.7–1.1 mm long in females and these lacking hairs or hairs minute, seta of 2 lower anthers 0.3–0.5 mm long. Fruit c. ellipsoid to obovoide, slightly compressed, 4–6 mm long, ca. 3 mm wide; seeds broadly ellipsoid, compressed, 0.5–0.6 mm long, light brown, reticulate, with more or less isodiametric alveoles. Flowers mostly Sep.–Jan.