198 Evans: HEpATICAE OF PUERTO RICO 
calls attention to the strong resemblance which it bears in size, 
color and general appearance to certain members of the genus 
Platyleyeunea. He discerned, however, even from his sterile spect- 
mens, that this resemblance was merely superficial and that the 
true alliance of the species was elsewhere, a view which the fertile 
specimens from Puerto Rico amply confirms. It differs from 
Platylejeunea more especially in its more or less dentate leaves, in 
its larger and differently constructed lobules, in its bifid under- 
leaves with their short line of attachment, and in its longer 9 
branch with much larger bracts and bracteoles. 
Cyclolejeunea convexistipa (Lehm. & Lindenb.) 
Jungermannia convexistipa Lehm. & Lindenb.; Lehmann, Pug. 
Plant. 6: 43. 1834. 
Phragmicoma Surinamensis Mont. Ann, Sci. Nat. Bot. II. 16: 
11d, 1843. 
Lejeunea convexistipa Lehm. & Lindenb.; G. L. & N. Syn. 
Hep. 328. 1845. 
Jungermannia patinfera Tayl.; G. L. & N. Syn. Hep. 329. 
1845 (as synonym). 
Lejeunca Surinamensis Mont.; G. L. & N. Syn. Hep. 329. 1845. 
Lejeunca Mougeotii Lindenb. & Gottsche; G. L. & N. Syn. 
Hep. 329. 1845. 
Lejeunea (Odonto-Lejeunea) Surinamensis Spruce, Hep. Amaz. 
, et And. 149. 1884. 
Lejeunca (Odonto-Lejeunea) stachyclada Spruce, /.c. 150. 1884- 
Lijeunea (Odontolejeunea) convexistipa Steph. Hedwigia, 27: 
284. 1888. 
Odontolejeunea convexistipa Schiffn. Bot. Jahrb. 23: 583. 1897. 
; Pale or bright green, growing in thin and intricate mats, often 
in company with other Lejeuneae ; stems 0.09 mm. in diametef, 
copiously and irregularly branched, the branches obliquely °F 
widely spreading, often ascending, usually with smaller leaves 
than the stem: leaves contiguous or loosely imbricated, the lobe 
plane or slightly convex, falcate-ovate, 0.75 mm. long, 0.45 mm. 
wide, attached by an almost longitudinal line of insertion but 
decurrent at the antical base by a single cell, antical margi? 
arching across or just beyond axis, slightly incurved near base, 
then strongly outwardly curved to apex, postical margin straight 
or nearly so, sometimes continuous with the keel but usually wit 
