442 A. W. Evans — Hawaiian Hepaticm of the Tribe Jubuloidem. 



underleaves orbicular, bifid about one half with subacute lobes and 

 lunulate sinus, entire or slightly ci'enulate from projecting cells : 

 leaf-cells with small, indistinct, and often confluent trigones and 

 intermediate thickenings : $ inflorescence borne on a principal 

 branch, innovating on one side, the innovation sometimes floriferous 

 but usually short> and sterile ; bracts deeply bifid, the lobe ovate or 

 oblong, rounded or obtuse at the apex, entire or slightly crenulate, 

 lobule lanceolate to narrowly oblong, acute to rounded at the apex, 

 crenulate ; bracteole obovate from a narrow base, slightly connate 

 on one side, bifid about one half with acute lobes and narrow sinus, 

 slightly crenulate or angular-unidentate on sides; perianth obovate, 

 cuneate toward base, truncate above and with a short beak, antical 

 keel low, the others sharp, keels entire or slightly crenulate on the 

 edges : 3 inflorescence occupying a short branch or terminal on a 

 longer one, bracts in three to five pairs, subequally bifid," with 

 broad, rounded lobes ; bracteoles confined to base of spike, small, 

 bifid one half with acute spreading lobes and narrow sinus : spores 

 green, oblong with a rather thin whitish wall, minutely tuberculate. 



Stems 0.]™™ in diameter, lobes of leaves 0.6x0.45'"™, lobules 

 0.16 X 0.1 S"^"", underleaves 0.25x0.25'"'", cells at edge of lobe 16/a 

 in diameter, in the middle 20/>(,, at the base 31x23/^, lobe of bract 

 0.5x0.25'"'", lobule 0.45x0.08'""^, bracteole 0.45x0.25'"'", perianth 

 0.7x0.5™"', spores 15/x in shortest diameter. 



On bark and leaves. Oahu: Nuuanu (Cooke). Kauai: Kipu, 

 Lihue, Molokoa (Cooke). Hawaiian Islands (Gaudichaud). 



2. Lejeunea Pacifica Mont. 



Lejeunea Pacifica, Mont. Ann. des Sc. Nat. II, xix, 262. 1843. 

 Eulejexmea Pacifica Steph. Bull, de I'Herb. Boissier, v, 842. 1897. 



Plate LV., figs. 1-7. 



Autoicous or dioicous : plants pale green, closely appressed to sub- 

 stratum : stems irregularlj'^ pinnate : leaves distant to subimbricated, 

 the lobe ovate to obovate, not arching across stem but forming almost 

 a straight line above the base, rounded at the apex, entire or very 

 slightly crenulate ; lobule triangular-ovate, obliquely truncate beyond 

 the apiculate apex, keel almost straight, continuous with postical 

 margin of lobe, free margin strongly involute near the base, entire ; 

 lobule often poorly developed : underleaves small, distant, bifid beyond 

 the middle -with narrow subulate lobes and broad lunulate sinus, 

 entire or nearly so : leaf-cells thin-walled, without trigones : $ inflo- 

 rescence borne on a principal branch or on a short lateral branch, 



