280 Evans : Hepaticae of Puerto Rico 



On the bark of trees or on prostrate logs, more rarely on living 

 leaves. El Yunque, Evans {42, 61, 74, g7, iSf). Originally 

 collected in Puerto Rico by Sintenis {j4, jj). Widely distributed 

 in the West Indies, the type locality being St. Kitts, where it was 

 first found by Breutel. It has also been reported from the follow- 

 ing islands : Guadeloupe, L Herminier ; Dominica, Elliott, Lloyd; 

 Martinique, Duss ; St. Vincent, Elliott; Cuba, Wrig-ht. The 

 specimens from the Andes, described by Spruce as L. spiiiosa, do 



not belong to this species. 



C. spinosa is characterized by its dentate leaves, usually destitute 

 of ocelli, by its strongly inflated and subsphencal lobules, by its 

 small, orbicular underleaves, by its dioicous inflorescence, and 

 especially by the peculiar horns of its perianth, which are enlarged 

 and inflated near the tips and yet more or less compressed. In 

 most species where the horns are elongated, they are terete and 

 taper gradually to a point. 



Under the name C. spinosa v^x , fiagelliformis ^ Stephani "^ has 

 described a peculiar but sterile plant from Martinique collected by 

 Duss. It differs from the typical C, spinosa in its much looser 

 habit, the leaves being distant and the branches slender and often 

 microphyllous, in its lobules, which are either poorly developed 

 or else conform to the usual type of lobule found in the genus, 

 and In its underleaves, which are more deeply bifid. Female 

 specimens of the same plant were collected by the writer on El 

 Yunque (/o/), where it grew sparingly on bushes. In these 



■ 



specimens the underleaves are occasionally subcordate at the base. 

 The plants present every appearance of being distinct from C, spi- 

 nosa^ but in the absence of perianths it would perhaps be unwise to 

 separate them. 



Ceratolejeunea valida sp. nov. 



Olive-brown, growing in depressed mats : stems 0.17 mm. in 

 diameter, elongated, irregularly pinnate, the branches usually 

 short and widely spreading, not microphyllous : leaves imbricated, 

 the lobe convex and inflexed at the apex, broadly falcate-ovate, 

 I.I mm. long, 0.85 mm. wide, antical margin straight or nearly 

 so near the base, then strongly arched to the apex, postical margin 

 less strongly arched and almost straight near the keel, apex broad, 



*Hedwigia34: 23S. 1895. 



