114 



CO to the Falkland Isles, and now Bolivia is intercalated in its 

 range ; yet I never fell in with it. Fewer Bolivian species than 

 might be predicated are identical with those of Chili or of South 

 Brazil, but further researches may add to their number. 



In the following catalogue the genera stand in nearly the same 

 order as in my ' Hepaticae Amazonicae et Andinae/ and I add a 

 few prefatory remarks on some of the more notable genera and 

 species. 



A peculiar feature in the hepatic vegetation of Bolivia seems 

 to be the paucity of species ol Frullania^ as contrasted with their 

 great abundance and variety in the Equatorial Andes. They are 

 such conspicuous plants, from their habit of forming large, shin- 

 ing, reddish-brown or lurid-purple patches on trees and rocks, 

 that, if existent, they could not have been overlooked. Yet one 

 species must have occurred in some quantity, as it forms the bulk 

 of three of Dr. Rusby's packets ; it is also new {F, Boliviana^ 

 n. sp.) and differs from its nearest ally, /^ tetraptej^a^ Mont., in 

 the dioicous inflorescence and other important characters specified 

 below, i^ tetraptera was discovered by d'Orbigny in Chili, and 

 a small fertile specimen has been picked out of Dr. Rusby's So- 

 rata collections by Mrs. Britton. The remaining species are all 

 in small quantity, but comprise some novelties, which will be 

 described in their place. 



The headquarters of the vast genus 'Lejetinea is in the hot, 

 damp forests of equatorial plains. In the Quitenian Andes there 

 is a considerable falling off in the number of species when we 

 ascend above 4,000 feet, which is Dr. Rusby's lowest limit for 

 hepatics in the Bolivian Andes. Three of his Lejetinea are in 

 considerable quantity: Z. {pmphalanthiis) filiformis (Sw.) ; L, 

 {Taxilejetmed) isocalycina^ in broad, milk-white patches, rarely 

 fertile ; and a Ceratolejeituea which I have called L, fastigiata, n. 

 Sp., from the long, sub-simple stems growing in closely-packed 

 bundles. Tropical ferns afford a prolific nidus for the minuter 

 LejeunecB. On an Acrostichttm gathered by Dr. Rusby grow, 

 besides an undescribed Radtila, some half dozen LejeitnecE, One 

 of these, Ceratolejeufiea malleigera, n. sp., is the gem of the col- 

 lection. It is abundantly fertile, and its most striking peculiarity 

 is in the perianth being produced upward into two mallet-like | 



