Cyclolejeunea
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Authority
Gradstein, S. Robbert & Ilkiu-Borges, Anna L. 2009. Guide to the plants of Central French Guiana. Part 4. Liverworts and hornworts. Mem. New York Bot. Gard. 76 (4): i-iv + 1-140.
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Family
Lejeuneaceae
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Scientific Name
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Description
Description - Plants small to medium-sized, pale green to brownish, creeping, usually with numerous, upright, gemmiparous shoots. Branches Lejeunea- type. Stems with hyalodermis, ventral merophyte 2 cells wide. Leaf lobes widely spreading also when dry, apex rounded to acute, margins finely crenulate to dentate, dorsal lobe surface smooth or elevated by large papillae (1 per cell). Cells thin-walled, with or without trigones, intermediate thickenings usually lacking, cuticle smooth or with a large papilla; oil bodies small, finely granular, usually 2-4 per cell; ocelli 1-3 at lobe base, side by side, rarely absent. Lobules never reduced, inflated, free margin involute, with a short, 1-celled tooth, hyaline papilla proximal. Underleaves bifid or undivided, margins plane, entire or toothed, insertion line almost straight. Androecia on short, specialized branches, bracteoles limited to base or present throughout, bracts with hypostatic lobules. Gynoecia on short or long branches, with 1 pycnolejeuneoid innovation. Perianths flattened-pyriform, somewhat inflated ventrally and with 2 broad, lateral keels expanded above into short auricles. Sporophyte lejeuneoid. Vegetative reproduction by means of multicellular, disciform gemmae produced on upright, gemmiparous shoots. Members of this genus very commonly are epiphyllous, but also occur on bark or rock. The dentation of leaves and underleaves varies considerably and is stronger on upright gemmiparous shoots than on creeping ones.