Lejeunea (sect. Crossotolejeunea) Spruce

[Clade VI]Lejeunea sect. CrossotolejeuneaSpruce (Spruce 1884: 161) Crossotolejeunea (Spruce) Schiffn. (Schiffner 1893: 127) Type species Same as for subg. Crossotolejeunea. Description Plants autoicous, dull green. Stems with 7–20 rows of medullary cells. Leaf lobes with a broad base, dorsal leaf surface smooth, leaf margin entire or crenulate, outer wall of margin cells thin. Cuticle densely and rather coarsely papillose. Oil bodies finely granular, 2–8 per cell, colourless. Male bracteoles restricted to the base of the male spike. Gynoecial innovations are sterile or fertile. Perianths inflated, 4–5 - keeled, keels ± 2 - winged, crenate to ciliate-laciniate. Asexual reproduction by strap-shaped gemmae. Distribution Neotropical. Species Lejeunea boryana, L. controversa Gottsche, L. pulverulenta (Steph.) M. E. Reiner. Notes The autoicous plants with a densely papillose cuticle and crenate to ciliate-laciniate, ± 2 - winged perianth keels are typical characters of this section. In its original circumscription (e. g. Spruce 1884; Stephani 1913), Crossotolejeunea contained almost 40 species, including numerous autoicous ones, but most of them have a smooth cuticle and proved to belong to other sections of Lejeunea, especially sect. Lamacerinae. Reference Reiner-Drehwald and Goda (2000).