A. W. Evans — Hawaiian Hepaticm of the Tribe Jubidoidem. 455 



rescence borne on a principal branch, innovating on ore side, the 

 innovation often floriferous ; bracts smaller than the leaves, plane, 

 entire, without clear indication of lobule ; bracteole usually absent ;* 

 perianth vai'iable in shape : 3 spike small, occupying a short lateral 

 branch ; bracts inflated, subequally bifid. 



1. Colurolejeunea tenuicornis sp. nov. 



Lejeanea calyptrifolia, var. Angstr. Ofversigt af Kongl. Vetensk. 

 Akad. Forhand. xxix, Haft 4, 28. 1872 (misprinted "X. calyp- 

 trata''''). 



Plate LIX., figs. 17-21. 



Autoicous : plants pale green, scattered or 'in small tufts : stems 

 sparingly branched : leaves distant, ascending in a curved line from 

 the axis and not at all adherent to substratum, oblong in general out- 

 line and gradually narrowed above into a long, hollow slender horn, 

 about half the length of the entire leaf and finely denticulate at the 

 apex (with two or three teeth), free portion of lobe orbicular from a 

 broad base, truncate, entire ; lobule tubular, the free margin strongly 

 involute ; sac inflated in lower part, then narrowing into horn ^ 

 leaf-cells thin-walled, papillose in narrowing portion of sac : under- 

 leaves distant, bifid to near the base with slender subulate divisions 

 and obtuse sinus, entire : ? inflorescence borne on a principal 

 branch, innovating on one side ; bracts oblong or obovate, rounded 

 or obliquely truncate at the apex, entire ; bracteole apparently want- 

 ing ; perianth oblong or obovate from a narrow base, truncate at the 

 apex and with a very short beak, terete below, five-keeled in upper 

 part, the keels running out into long, horizontally spreading horns, 

 denticulate at the end : $ spike small, occupying a short branch ; 

 bracts in two or three p.airs ; antheridia two in each axil. 



Stem 0.08""" in diameter, leaf 1.6 x 0.25™", underleaf 0,15 x 0.15"^^% 

 cells at free margin of lobe 20/a in diameter, on surface of sac 

 23 X 17/x, bracts 0.4 x CI™'" perianth 0.6 x 0.2™™. 



On leaves of a fern. Oahu : Nuuanu (Cooke); al*^o collected by 

 Andersson. 



The rare European C. calyptrifolia (Hook.) Schiffn., as represented 

 in the Kew Herbarium, is very close to this carious Hawaiian plant 

 but differs in the much shorter horns of its leaves and perianths. 



* A bracteole is described for C. obtusa Steph. (Hedwigia, xxx, 208. pi. S9. f. 

 31-34. 1891), and for C. AH Steph. (1. c. xxxv, 73. 1896). 



