164 Evans: Hepaticae of Puerto Rico 



spores green, spherical or ellipsoidal, 35 }i in diameter, minutely 

 verruculose and with circles of indistinct radiating ridges ; elaters 

 about 10 /J. in diameter, sometimes bispiral in the middle. (Plate 

 7, figures 1-1 1.) 



On trees. Between Cayey and Caguas, Howe {1411 p- P-> 

 1414). Type locality, Brazil, Martins ; since found by numerous 

 collectors. Known also from Mexico, Liebman, and from the fol- 

 lowing islands of the West Indies : Cuba, Wright ; Santo Do- 

 mingo, Pcrsoon (the type locality of Lejennea domingensis)'. Ja- 



Hai 



Hepat 



but some of its most significant characters have since been empha- 

 sized by Schiffner.* Considerable confusion was introduced by 

 Taylor into the synonymy of the plant by the publication of Le- 

 jatnea domingensis. This species was based on specimens which 

 he at first called L. lingnaefolia, and material thus named was 

 deposited in the Hooker herbarium. Subsequently he renamed 

 the species L. domingensis and transferred the name L. lingnaefolia 

 to an entirely distinct plant collected by Richard on the island of 

 St. Thomas. Both species were soon afterwards published in the 

 same paper. Many years later, Spruce, basing his opinion on the 

 specimens in the Hooker herbarium rather than on Taylor's de- 



^c«jto anu jLv. ibtiy 



efoli 



subgenus Acro-Lejennea, apparently considering them distinct from 

 each other and also from Ptychocolens polycarpns. Through the 

 study of authentic material in the Lindenberg herbarium, Stephani f 

 was able to reduce both species to synonymy, L. domingensis 



efolia 



poly carp 



chiolejeiuiea corticalis. Specimens in the Mitten herbarium, now in 

 the possession of the New York Botanical Garden, amply confirm 

 the conclusions of Stephani. 



The 



polycarp 



below the middle and are exceedingly variable even on a single 

 plant. According to Schiffner, five or six keels are present, while 

 Spruce gives the num ber as four or five. These discrepancies are 



*Hedwigia 33: 181. 1894. See also Gottsche, Abhandl. naturw. Verein. 

 Bremen 7 : 350, 351. 1882. 



t Hedwigia 28 : 166, 167. 1889; 29: 22. 1890. 



