6 



w. H. PEARSON. 



[No. 3. 



4. Lejeunea (Micro-Lejeunea) Helenae n. sp. 



Dioica, pusilla, prostrata, irregulariter pinnata, flavido- 

 viridis; folia dissita subimbricatave, angulo 55° patula, late 

 ovata; lobulo 3 — 4 plo breviore, ovali, tumido; foliola magna, 

 ovalia late ovaliave, bifida, segmentis acutis. 



Dioicoiis. Small, prostrate, irregularly pinnate, pale 

 yellowish green, when dry pale yellow. Leaves approximate 

 or subimbricate, spreading at an angle of 50 to 60°, concave 

 or nearly plane, the border sometimes somewhat recurved, 

 roundish ovate, obtuse, 10 to 12 cells broad by 12 to 16 

 long, rotundate; cells 5- or 6-sided, small, walls distinct, 

 lumen echlorophyllose, marginal cells smaller; lobule 3—4 

 times smaller, oval, very tumid, free margin unidentate, 

 rarely bidentate or entire, incurved, keel smooth, sometimes 

 obsolete. Underleaves large for the size of plant, 3 to 4 

 times smaller than leaf, double the width of stem, oval or 

 broadly oval, divided down to the middle or nearly so, sinus 

 acute, segments ovato-lanceolate, acute. Perianth on short 

 lateral branch near to the base of stem, imperfect. 



Measurements. Stems 1 cm long, .05 mm diam., leaves 

 .3 mm long X .24 mm broad, .3 X .2, .275 X .225, .275 

 X .2, .25 X .175, .225 X .175; cells Vso to Veo mm; lobules 

 .15 mm long X .1 mm broad, .15 X .075, .125 X .075; 

 underleaves .15 mm long X .12 mm broad, .15 X .1? -12 X 

 .12, .12 X .1. 



Hab. On trees by a river near Umpumulo. 



Obs. Near to Lejeunea cucullata N. which has more 

 ascending leaves, larger lobules. 



Lejeunea liieens Tayl. has sub-triangular, almost acute 

 leaves, with different underleaves. 



„Diverges from the character of the sub-genus (Micro- 

 Lejeunea) by larger, less deeply-cloven underleaves, whose 

 segments are ovato-lanceolate. In these particulars and others 

 it comes very near L. lucens Tayl. (Parå) which I have 

 placed first after Eu-Lejeunea. Micro-Lejeunea indeed is 

 only a section of Eu-Lejeunea." R. S. 



