Monographs Details: Micranthemum umbrosum (Walter) S.F.Blake
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Species Description - Stems creeping, freely branched, glabrous, to 3 dm; lvs sessile, broadly elliptic to rotund, 4–10 mm, obscurely 3–5-nerved from the base; pedicels 1 mm or less; cal at anthesis 1.5–2 mm; cor shorter than the cal, its lower lobe 1 mm; fr 1 mm. Wet soil or shallow water on the coastal plain; tropical Amer., n. along the coast to se. Va. (Globifera u.)