Rectolejeunea
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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
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Description - Plants small, dull pale green, creeping, often with tiny, upright, flagelliform shoots. Branches Lejeunea-type. Stems with hyalodermis; ventral merophyte 2.cells wide. Leaf lobes widely spreading, plane, asymmetrically ovate, dorsal margin arched, ventral margin almost straight and forming a straight line with keel, apex rounded, margins entire or minutely crenulate, with cilia or rhizoids on stems producing caducous leaves. Cells plane, typically small and subisodiametrical, 12-18 pm in diameter, walls thin or uniformly thickened, without trigones and intermediate thickenings, cuticle smooth; oil bodies lacking in green cells or minute; ocelli present at leaf base (usually forming a short row) and often scattered through lobe. Lobules small, strongly inflated, not reduced, keel straight, smooth, mouth truncate, apical tooth 1-celled, long and falcate-acuminate, hyaline papilla proximal. Under leaves bifid, small, without ocelli, insertion line straight. Androecia on short, specialized branches, bracteoles limited to base, bracts with hypostatic lobules. Gynoecia on long shoots, with 1—2 pycnolejeuneoid innovations. Perianths flattened, 3-keeled, ventral keel broad, 2-angled. Sporophyte lejeuneoid. Vegetative reproduction by caducous leaves, usually produced on upright, flagelliform shoots.