erect herbs. Stem hollow, angular, weakly diffuse or stoloniferous, rooting at
basal nodes. Basal and lower leaves petiolate, wholly sheathing, 1-4 pinnate,
homomorphic or heteromorphic to the cauline leaves. Umbels terminal and
axillary or leaf-opposed. Bracts absent or occasionally 1, bracteoles numerous.
Calyx teeth prominent, lanceolate, as long as the stylopodium. Petals obovate,
apex emerginate, with small incurved lobule, outer petals in umbellule usually
radiant, white or pale pink. Fruits ovoid or sub-globose, glabrous, dorsal and
intermediate ribs corky or somewhat protruding, lateral ribs deltoid,
sub-triangular, corky. Seeds face plain, carpophores obsolete.