Evans: New West Indian Lejeuneae 375 



the trigones are also large and the underleaves are everywhere 

 denticulate. The species is dioicous and is described from male 

 material ; in the absence of perianths its generic position cannot 

 be regarded as definitely established. 



Another species which should also be compared with T. dila- 

 tata is the dioicous Lejeunca asperrima Spruce. Unfortunately the 

 generic position of this plant is far from settled, because the peri- 

 | anths are still unknown. In the original description Spruce 

 referred it with some question to Priono-Lejeunea ;* he afterwards 

 transferred it to Harpalcjeunea f and still later distributed it in his 

 Hepaticae Spruceanae under Trachylejainea. L. asperrima was 

 first described from Brazilian specimens but has since been reported 

 by its author from the island of St. Vincent. In the abrupt dila- 

 tion of its leaf-lobes, in its thin cell-walls, in its lack of ocelli and 

 m its subfloral innovations, it agrees with both T. dilatata and T, 

 pnonocalyx. The roughness, however, is more extensive, a por- 

 tion of the lobule and practically the whole of the lobe being in- 

 volved. The leaf-cells are thin-walled throughout, and the rough- 

 ness, as in T. dilatata, is due to the conical projections of the cells. 



Th 



form 



>pcues is about as large as T. pnonocalyx. 



* 



Harpalejeunea reflexula sp. nov. 



Pale or bright green, dull, scattered among other Lejeuneae ox 

 ling small depressed mats: stems 0.35 mm. in diameter, 



nat 14, adhCrent t0 the substratum > sparingly and irregularly pin- 



lo C ' • Drancnes wid ely spreading, similar to the stem : leaves 



and^ ^ 1T ? catec *' tne * ODe obliquely spreading, strongly convex 



usually reflexed or revolute at the apex, falcate, broadly ovate, 



sin I mm *»' °' 2 mm - w 'de, antical margin decurrent by a 

 cu ^ h ne arly straight near base, then strongly outwardly 



erad if° apeX ' postical margin straight or slightly curved, apex 

 four 11 acun ? inate '. usually tipped with a row of from two to 

 Pro^ f S ' mar £ m ent i r e or vaguely and irregularly crenulate from 

 wid Je ° K g ° e ^ S ' ^ ODU ^ e ova te in outline, 0.14 mm. long, 0.1 mm. 

 andV ptIy con tracted in outer part, otherwise strongly inflated 

 form ,0rm ' ng an almost spherical water-sac, keel strongly arched, 

 ma ™' ng an an g!e of about 90 with postical margin of lobe, free 

 siWl m K1 curved and revolute to beyond the apex, tipped with a 

 --i^I^^en^censof lobe slightly convex, averaging 12// at 



" e P- Am^T«Aiidri6o. 1 884^ 

 TJour. Linn. SocBot. 30:341. 1894. 



