Lejeunea (sect. Macrolejeunea) Gradst. & G. E. Lee, stat. nov.

[Clade I]Lejeunea sect. Macrolejeunea(Spruce) Gradst. & G. E. Lee stat. nov. Lejeunea subg. Macrolejeunea Spruce (Spruce 1884: 224) Type species Lejeunea pallescens Mitt. (lectotype, designated by Evans 1906). Description Plants dioicous. Stem epidermis cells large, ca 3.5–6 times larger than medullary cells and strongly bulging outwards, medullary cells in 10–50 rows. Oil bodies granular. Gynoecial innovations absent. Perianths eplicate. Asexual reproduction by specialized devices absent. Distribution Neotropical. Species Lejeunea osculatiana De Not., L. pallescens Mitt. Further species (not sequenced) Lejeunea sessiliflora (Steph.) Grolle. Notes The typical characters of sect. Macrolejeunea are the absence of innovations and the usually eplicate perianth. Lejeunea sessiliflora, a rare Caribbean species known from Cuba and Haiti, is placed in sect. Macrolejeunea following Grolle (1988). The species fits this section in stem anatomy, dioicy, a highly connate female involucre, and absence of innovations and asexual reproduction. References Grolle (1988), Reiner-Drehwald and Schäfer-Verwimp (2008).