480 A. W. Evans — Hawaiian Hepaticcje of the Trihe Juhuloidem. 



continuous curve with postical margin of lobe, free margin of lobule 

 plane and appressecl to lobe except close to the base, lunate at apex 

 with a curved apical tooth : underleaves distant, deeply bifid, the 

 divisions widely spreading or, on poorly developed stems and 

 branches, erect or only slightly divergent, subulate, three or four 

 cells long, two cells wide at base, separated by a broad, obtuse or 

 lunulate sinus: leaf-cells with somewhat thickened walls, the trigones 

 and intermediate thickenings indistinct and more or less confluent; 

 ocelli scarcely larger than the other cells, two or three in number, 

 scattered, sometimes wanting : ? inflorescence borne on a very short 

 branch, innovating on one side ; bracts unequally bifid, the lobe 

 ovate, acute, entire or subdentate, lobule ovate, acute, usually 

 unindentate on inner side near apex; bracteole free, ovate to 

 obovate, bifid about one third with narrow acuminate lobes and 

 sinus, entire or nearly so ; perianth cuneiform in outline, broadly 

 truncate at apex and with a broad beak, sharply five-keeled in upper 

 part, the keels prolonged as horizontally spreading acute horns, 

 entire or denticulate at apex : t spike occupying a short branch, 

 globose or oval ; bracts in one to three pairs, with entire lobes, brac- 

 teoles small, usually at base of spike only, bifid about one third, with 

 narrow suberect divisions, similar to the underleaves on small 

 branches : spores oblong, green, slightly verruculose. 



Stems 0.04™™ in diameter, lobes of leaves 0.3x0.15™™, lobules 

 0.2x0.1™™, underleaves 0.1x0.2™™, or on smaller branches 

 0.08 X 0.06™™, cells at edge of lobe 18 x 16/*, in the middle and at base 

 25x16/*, lobe of bract 0.35x0.15™™, lobule 0.3x0.01™™, bracteole 

 0.8 X 0.12™™, perianth 0.6x0.4™™, capsule 0.2™™ in diameter, spores 

 16 to 21/A in diameter. 



On trees or on living leaves. Oahu : Konahuanui (Cooke); first 

 collected on the island by Anderss'on. 



Through the kindness of Professor Nathorst, I have been able to 

 examine the t3^pe-material of this distinct little species. It consists 

 of a few fragmentary stems and upon one of these is an old and 

 battered perianth, whose involucre has been largelj' worn away. 

 The description which I had drawn from these specimens has been 

 supplemented by the more complete material collected during the 

 past summer by Mr. Cooke. His specimens show that the under- 

 leaves are somewhat variable in shape: on robust stems and branches, 

 their lobes are widely divaricate, while on smaller stems and branches 

 they may be erect or nearly so. It is in fact quite usual to find both 

 these conditions upon an individual plant. The larger size of D. 



