A. W. Evans — Ilaioaiian Hepaticm of the Tribe Juhuloidece. 421 



lejeunea and indicate a certain affinity with _C hicolor (Mont.) 

 Schiffn., to which Montagne originally referred the Hawaiian plant. 

 It differs from this species of tropical America in its more squarrose 

 leaves, in the less recurved postical margins of their lobes, and in 

 their larger cells, in its single innovation, in its wingless outer bract, 

 and in its undivided inner bract. This last character indeed is a most 

 unusual one for the genus, and, so far as I know, does not occur in 

 any other species. In a sterile condition, B. corticalis (Lehm. & 

 Lindenb.), likewise of tropical America, resembles the present species 

 very closely, but differs in its larger lobule and less papillose leaf- 

 cells. 



The original material of Brachiolejeunea Gottschei from Japan 

 (or Java) is in the Gottsche Herbarium at Berlin and agrees closely 

 with the Hawaiian plant. The species has also been reported from 

 China by Professor Massalongo, who describes the inflorescence as 

 polyoicous.* 



6. MARCHESINIA S. F. Gray. 



Marchesinia S. F. Gray, Nat. Arr. Brit. PL i, 689. 1821 (as 



" Marchesinus "), 

 Phragmicoma Dumort. Com. bot. 112. 1822. 

 Lejeunea subgenus Ilomalo- Lejeunea Spruce, Hep. Amaz. et And. 



132. 1884. 



Plants large, brown or greenish-brown, usually growing in depressed 

 tufts: stems irregularly pinnate or more commonly dichotomously 

 branched : leaves more or less imbricated, the lobe ovate to orbicular- 

 ovate, widely spreading, entire throughout, or apiculate and more or 

 less toothed near apex ; lobule small, plane or slightly inflated, usually 

 wdth one to four teeth on fi'ee margin ; underleaves large, often im- 

 bricated, orbicular to reniform, more or less cordate and decurrent 

 at base, raai-gin entire to dentate-spinulose: leaf -cells with more or 

 less thickened walls : 9 inflorescence borne on a principal branch, 

 innovating on both sides; bracts narrower than the leaves, the lobe 

 usually spinulose, lobule small, entire; bracteole obovate, truncate 

 or emarginate, usually more or less toothed on margin; perianth 

 obovate, strongly compressed, plane on both surfaces, or with a low 

 postical keel, truncate or retuse at apex, entire or indistinctly winged 

 on lateral keels : <$ inflorescence variously situated, often hypogy- 

 nous or within a fork, with few to many bracts. 



* Mem. dell' Accad. di Art. e Comm. di Verona, Ixxiii, 35. 1897. 



