Monographs Details: Riccia enyae Jovet-Ast
Bischler, Hélène, et al. 2005. Marchantiidae. Fl. Neotrop. Monogr. 97: 1--262. (Published by NYBG Press
Description:Species Description - Thalli forming partial rosettes or gregarious patches; lobes 10 mm long, 0.9-1.6 (-2.2) mm wide, sometimes slightly emarginate apically, 2-3 times deeply forked, the basal dichotomy reaching 7-9 mm; dorsal side pale green, margins rounded. Epidermal cells partly disintegrating, conical, thin-walled. Median groove shallow. Ventral scales hyaline, not extending beyond lobe margins, with slightly thickened walls, cells 30-38 × 24-25 µm. Cilia few, from top to bottom of lobes, on margins and in upper part of flanks, erect or slightly arched, finely verrucose in the upper 2/3, some acute, to 240 Jim long, others, especially on the flanks, shorter, 60-112 µm. Cross section of lobes 0.4-0.5 mm high, 3-4 times as wide as high; dorsal edge obtuse laterally; flanks ascending obliquely and concave; ventral edge convex; cells of dorsal tissue of the same size as those of ventral tissue. Monoecious. Antheridial necks weakly protruding, hyaline. Archegonial necks weakly protruding, the young hyaline, the older red-violet. Sporangia weakly bulging on dorsal side. Spores 72-84(-92) µm diam., light red-brown; wing irregular, 4-5(-7) µm wide; distal face with (5-)6-8 areoles across diam., with thin ridges and low, sometimes anastomosed tubercles; proximal face with numerous areoles, smaller than those of distal face, with thin ridges and small but distinct tubercles, triradiate scar weak.
Discussion:Riccia enyae is allied to R. horrida and R. cubensis. In R. enyae, cilia are less numerous than in R. horrida. The lobe dichotomies are always deep in R. enyae, whereas in R. cubensis only the basal fork is deep.
Rio Grande do Sul Brazil South America