Evans: New West Indian Lejeuneae 3s 5 



On bark of trees, Abaco : Old Kerr's Point, Brace (202/ p. 

 p.). New Providence : junction of Southeast and Soldiers' roads,. 

 Coker(i p.p.) ; ten miles west of Nassau, Coker{2) ; Grant's Town, 

 E, G. Britton {5 6 2); north slope of Blue Hills, E. G. Britton {584.) ; 

 Fox Hills path, Britton & Millspaugh {2000) ; near Tea House, £. 

 G. Britton (jioi). Watling's Island : Cockburn Town and vicinity, 

 Britton & Millspaugh {6126). Crooked Island : road to Vauxhall, 

 Brace {4746) ; Stopper Hill, Brace {4816). Cuba : Matanzas, 

 Britton & Wilson {81). All of these localities except the last are 

 in the Bahamian archipelago. No. 4816, from Crooked Island, 

 may be designated the type. 



When this species was first studied by the writer it was referred 

 to B. corticalis (Lehm. & Lindenb.) Schiffn., and it is cited under 

 this name by Coker in the only list of Bahamian Hepaticae which 

 has yet been published.* The two plants resemble each other 

 very closely in general appearance, in size, in color, in the form 

 of the leaves and underleaves, and in the structure of the leaf-cells. 

 They differ in inflorescence, B. corticalis being dioicous, and in 

 certain characters derived from the lobules, the underleaves, and 

 the floral organs. In B. bahamensis the free margin of the lobule 

 usually bears five teeth, each three or four cells long, and the 

 underleaves are rounded or minutely auriculate at the base ; in 

 ^■corticalis the free margin of the lobule usually bears only four 

 teeth, each one or two cells long, and the underleaves either have 

 subparallel sides or are cuneate at the base. In B. bahamensis the 

 divisions of the perichaetial bracts are narrowed toward the apex 

 and m °re or less acute, while the lobule, which is much shorter 

 an the lobe, is adnate for the greater part of its length ; in B. 

 corticalis the divisions of the bracts are rounded at the apex, and 

 l »e lobule, which is nearly as long as the lobe, projects consider- 

 % beyond the keel. In B. bahamensis the perianth seems to be 

 instantly ten-keeled, while in B. corticalis the number of keels 

 Van es from five to eight. The new species is also remarkable be- 

 Cause a11 of its branches, so far as observed, conform to the Le- 



]eUnea ^Pe, while in B, corticalis branches of the Frullania type 

 a ^ejiotjnf requent 



sine *w! Shattuc ^The~Bah^ian Islands"^. «9<>5- The true B. corticalis has 

 been collected on the island of Great Bahama and on Cat Island by Britton and 

 *Paugh (* SJJt 2b4by 2?Igf 272St5 s 99 ). 



M 



