Mudwort

Marsh or aquatic, perennial herbs, glabrous, tufted, creeping or floating. Plants stemless or with slender stolon-like stems rooting at the nodes. Leaves petiolate, usually basal, sometimes fasciculate at the nodes, rarely alternate, erect or floating; lamina linear, spathulate or oblong-ovate. Flowers solitary, axillary, borne on peduncles which are usually shorter than the leaves, and are often deflexed in fruit. Calyx (4-)5-lobed. Corolla: limb 5-lobed, spreading; lobes subequal. Stamens 4, didynamous. Ovary 2-locular; ovules many. Fruit a 2-valved, ovoid or spherical capsule, almost indehiscent.

Limosella is a genus of flowering plants known as mudworts. These are annual, largely aquatic plants, found in muddy areas worldwide. Its phylogeny and biogeography are inferred from molecular data

Selected species:

Limosella acaulis - Owyhee mudwort Limosella aquatica - water mudwort Limosella australis - Welsh mudwort Limosella capensis Limosella inflata Limosella longiflora Limosella major Limosella pubiflora - Chiricahua Mountain mudwort