Monographs Details: Riccia subdepilata Jovet-Ast
Bischler, Hélène, et al. 2005. Marchantiidae. Fl. Neotrop. Monogr. 97: 1--262. (Published by NYBG Press
Description:Species Description - Thalli forming complete or partial rosettes, of 13 mm diam.. Lobes with 3-4 deep dichotomies, 3-9 mm long, 0.7-1.1 mm wide, thin, rounded, and slightly emarginate and inflexed apically; dorsal side light brown to pale green. Median groove nearly absent. Epidermal cells disintegrating. Ventral scales hyaline, not reaching lobe margins. Cilia few, scattered on lobe margins, hyaline, stiff, erect or slightly arched, 120-380 µm long, with thickened walls on one side, granulose from apex to 2/3 of length. Cross section of lobes 0.15-0.2 mm high, of 8-10 cell layers; dorsal edge rounded; flanks oblique; ventral edge hardly convex. Monoecious. Spores spherical to tetrahedral, 84-96 µm diam., red-brown with darker ornamentation; wing granulose, 4-8 µm wide, to 12 µm wide near pores and delimiting a smooth, triangular area, margin slightly thickened and granulose; distal face with 8-11 complete areoles across diam., each (7-)9-12 µm diam., ridges with large tubercles, sometimes with strip of small tubercles only near equator; proximal face with less complete areoles but with similar ridges and tubercles, triradiate scar distinct.
Discussion:Riccia subdepilata is close to R. horrida, with which it shares a similar spore wall ornamentation. The distinctive characters of the 2 species are outlined under R. horrida.
Bahia Brazil South America