Compilation
Nasturtium limosum

Annuals; glabrous throughout. Stems (simple or several-branched from base) erect, branched distally, (0.9–)2–4.5(–6.3) dm. Basal leaves not rosulate; blade margins dentate. Cauline leaves shortly petiolate or sessile; blade oblong or oblanceolate to obovate, 1.5–7(–13.3) cm × (5–)10–28(–50) mm, (lateral lobes much smaller than terminal), base auriculate or not, margins dentate or less frequently sinuate, or (lateral lobes) denticulate or entire. Racemes considerably elongated. Fruiting pedicels divaricate-ascending to horizontal, straight, 0.5–2(–4) mm, (slender or stout). Flowers: sepals ascending to spreading, ovate, 1.2–2 × 0.5–0.8 mm; petals absent; median filaments 1–1.6 mm; anthers ovate, 0.2–0.3 mm. Fruits siliques, straight or curved, oblong to oblong-linear, (4–)6–9(–12) × (1.4–)1.8–2.8(–3.5) mm; ovules 158–242 per ovary; style 0.1–0.5 mm. Seeds biseriate, yellow-brown, cordiform, 0.4–0.5 mm, foveolate. 2n = 16.