A. W. Evans — Hawaiian Hepaticce of the Tribe Jabuloidece. 431 



Anderssonii and the subentire lobes of its leaves, acute but not 

 acuminate at the apex, will at once distinguish it from the following- 

 species. 



2. Drepanolejetmea uncinata (Mitt.) Steph. 

 Lejeunea uncinata Mitt.; Seeraann, Flora Vitiensis, 416. 1871. 

 Lejeunea ungvlata Angstr. Ofversigt af Kongl. Vetensk. Akad. 



Forhand. xxix. Haft 4, 25. 1872. 

 Drepanolejeunea uncinata Steph. Bull, de I'Herb. Boissier, v, 842. 



1897. 



Plate LI., figs. 10-18. 



Autoicous : plants creeping over other bryophytes, pale green : 

 stems slender, spai'ingly and irregularly branched : leaves distant or 

 contiguous, the lobe ovate to lanceolate, obliquely spreading, long- 

 acuminate and deflexed forward at apex, antical margin on robust 

 leaves with two or three sharp teeth, postical margin with a single 

 blunter tooth next the keel, margins on poorly developed leaves 

 often entire ; lobule ovate, lunately truncate at apex, with distinct 

 apical tooth, strongly inflated, keel arched, free margin strongly 

 involute to beyond apical tooth : underleaves bifid to within one or 

 two cells of base, the lobes slightly spreading, subulate, two cells 

 wide at base and three or four cells long, sinus lunulate : leaf-cells with 

 slightly thickened walls, the very indistinct trigones and intermediate 

 thickenings more or less confluent ; ocelli two or three, scattered : 

 $ inflorescence borne on a very short branch, innovating on one side 

 with a long sterile innovation ; bracts unequally bitid, the lobe 

 rhombic or obovate, acuminate, coarsely dentate on margins (two to 

 four teeth on each side), lobule tooth-like, acute, entire or with a 

 single tooth near apex ; bracteole free, ovate to obovate, bifid about 

 one thii'd with acute or acuminate lobes and narrow sinus, with 

 about three coarse teeth on each side ; perianth obovate, truncate 

 above and with a short beak, almost terete below, sharply five-keeled 

 above, the keels running out into acute or acuminate almost hori- 

 zontal horns or processes, slightly denticulate near the ends : 5 spike 

 occupying a very short branch, subglobose ; bracts in one or two 

 pairs, the divisions slightly dentate ; bracteole usually single, very 

 small : spores irregvdar in shape, more or less oblong, angular, green, 

 with a thickened, whitish, minutely verruculose wall. 



Stems 0.04™"' in diameter, lobes of leaves 0.3x0.17""°, lobules 

 0.17x0.1™'", underleaves 0.08 x 0.07™*", cells at edge of lobe 18/i, in 

 diameter, in the middle and at the base 18xl2jii, lobe of bract 

 0.35x0.17""", lobule 0.2x0.05"'"', bracteole 0.3x0.17'""', perianth 



