Drepanolejeunea polyrhiza (Nees) Grolle & R.L.Zhu
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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
Species Description - Plants 0.3-0.6 mm wide. Leaf lobes obliquely to widely spreading, symmetrical, short oblong, lobes 1.5-2 times longer than wide, flat, apex broadly rounded (in young leaves sometimes somewhat pointed), margins irregularly crenulate in upper 1/2. Cells in mid-lobe 15-20 x 15 µm, evenly thick-walled with small, subconfluent trigones and intermediate thickenings; ocelli 2 in a broken row in lower 1/2 of leaf, basal ocellus separated from the next by 1 cell, occasionally 1-2 small ocelli present in upper 1/2 of lamina. Lobules mostly reduced, when well-developed large, to 1/2 of leaf lobe, fully inflated, lateral free margin bordered by 4 narrow, rectangular cells, apical free margin by 2 cells; apical tooth long, falcate, 1-celled, preapical tooth reduced. Underleaf lobes rather long, obliquely to usually horizontally diverging, 3-4 cells long, 1 cell wide, cells narrow, rectangular. Autoicous. Perianth keels extended above into short, toothed, horn-like projections.
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Discussion
This species resembles Leptolejeunea by its leaf shape but differs from species of the latter genus by the unbordered underleaves, long- falcate lobule tooth, small leaf cells, and presence of innovations.