TWO INTERESTING SPECIES OF LEJEUNEACEAE FROM BRAZIL

Abstract

  Description and illustration of two unusual species of Lejeuneaceae discovered in southeastern Brazil by the junior author (A. S.-V.) and his wife: Cheilolejeunea revoluta (Herz.) Gradst. & Grolle comb. nov. (=Pycnolejeunea revoluta Herz.) (C. subg. Euosmolejeunea sect. Revolutae Gradst. & Grolle, sect. nov.), a rare species described from Colombia and characterized by many “ptychanthoid” features including robust stem with broad ventral merophytes, flagelliform branches and androecia with bracteoles throughout the spike, and Leucolejeunea caducifolia Gradst. & Schäfer-Verwimp, a species new to science characterized by copious production of caducous leaves. Both species grow in areas with high precipitation, mostly in montane environments.