452 A. W. Evans — Havmiian Ilepaticm of the Tribe Jiihuloidece. 



of normal leaves, lobule attached by an almost straight keel, oblong 

 in shape, with a papilla near the free upper angle and a second one on 

 the inner edge near the apex ; perianth obovate, truncate or rounded 

 above, and narrowed into a very short beak, subterete (without dis- 

 tinct keels), smooth: ,^ inflorescence terminal on a principal branch 

 or occupying a short branch, bracts in three to six pairs, contiguous or 

 subimbricated, sometimes scarcely different from the leaves in shape, 

 sometimes subequally bifid ; antheridia two in each axil. 



Stem 0.08"™ in diameter, lobes of leaves 0.85x0.25'""', lobules 

 0.35 X 0,15°"'^, cells at edge of lobe 35 x 18/^,, m the middle 30 x 16/x, 

 at the base 37x1 4/i,, lobe of bract 0.7x0.2'""', lobule 0.25x0.05""", 

 perianth 0.6 x 0.25'""\ 



On DumoTtiera and also on leaves. Hawaiian Islands (Hille- 

 brand). Oahu : Konahuanui (Cooke). 



The present species is known only from the type-material in the 

 Austin Herbarium and irom a few fragmentary specimens collected 

 last summer by Mr. Cooke. A part of the type was kindly sent me 

 by Mr. Pearson, and has served for the above description. The leaf- 

 cells of C. Hillebrandii are variable in shape ; sometimes they are 

 elongated as in the ones wliose measurements are given, sometimes 

 they are more nearly isodiaraetric. In comparing this plant wdth 

 other Hawaiian species, its closest ally seems to be C. ceatocarpa. 

 Even in a sterile condition, however, the difference in the shape of the 

 leaves at once suffices to distinguish them : in C. Hillebrandii, the 

 lobes narrow very much toward the apex, and the broadest part is 

 just above the base ; in C. ceatocarpa, the lobes are broad at the 

 apex, and the broadest part is nearer the middle. The perianths of 

 C. Hillebrandii are very scanty in the plants examined and are 

 apparently not perfectly developed. It can be made out, however, 

 that they are scarcely if at all flattened, and that they show no 

 signs of anything like jjrojections or cordations at the apex. They 

 would, therefore, afford important differential characters for the two 

 species. 



6. Cololejeunea lanciloba Steph. 



Cololejeunea lanciloba Steph. Hedwigia, xxxiv, 250. 1895. 



Plate LIX., figs. 1-7. 



Autoicous : plants green, closely appressed to substratum, some- 

 times forming patches of considerable size : leaves slightly imbri- 

 cated, the lobe plane, obliquely spreading, arching beyond axis and 

 rounded at the very narrow, almost transverse base, oval, rounded at 



