16 C. M. Cooke, Jr.—The Hawaiian Hepatice 
ing nearly across the stem, postical base not decurrent, line of inser- 
tion lunate, apex obliquely truncate, tri-(bi- or quadri-) dentate, teeth 
broadly triangular, acute ; sinuses separating teeth lunate: under- 
leaves twice the width of the stem, approximate or slightly imbri- 
cated, orbicular, apex retuse, crenulate or dentate, base subcordate : 
leaf-cells with stellate cavities, walls thin, trigones large, sometimes 
nearly as large as the cavities ; cells of underleaves similar to those 
of leaves: @ inflorescence borne on a very short branch; bracts 
in 3 or 4 pairs ; innermost bracts ovate, the upper half denticulate, 
apex bifid to quadrifid, lobes subulate, margins denticulate ; cells 
with thickened walls, those at margin with outer walls thin, trigones 
small ; innermost bracteole similar to bract but narrower and slightly 
shorter ; bracts and bracteole of second row much smaller, bifid to 
quadrifid, lobes subulate, sparingly denticulate ; perianth ovoid- 
cylindrical, terete below, irregularly keeled above, mouth contracted, 
irregularly lobed, lobes laciniate, laciniz 2 to 4 cells broad, 5 to 8 cells 
long, ending ina row of 2 to 5 cells: capsule oval, dark brown; spores 
round, verruculose ; elaters slender, blunt. 
Stems 0.3"" in diameter, leaves 0.85™™ long, 0.6™™ wide near the 
base, 0.25™™ at the apex; underleaves 0.357™x0.5™™; leaf-cells at base 
of median tooth 25, at base of leaf 57x33, antical edge 24, at 
middle of underleaf 404x30p ; innermost bract 1.6™"x1.1™™ 5 inner- 
most bracteole 1.6™"x0.8™™"; perianth 2.9™"x1.0"; spores 20m; ela- 
ters 160 to 240px12p. 
Hawaii: Kilavea (Didrichsen). Hawaiian Islands (Baldwin). Oahu: 
Nuuanu (Cooke). 
This plant is easily distinguished from L. cordistipula, its nearest 
Hawaiian relative, by its shorter and much less frequently branched 
stems, by its much smaller leaves and underleaves, and by its 
slightly larger leaf-cells with stellate cavities and much larger 
trigones. 
An aberrant form of this species is found in the same locality but 
not mixed with typical specimens. The stems branch much more 
frequently, the leaves are nearly half again as long and twice as 
broad, deeply bidentate, the lobes triangular, acute or acuminate, 
4 to 6 cells broad, 6 to 8 cells long, connivent or spreading, the sinus 
acute or obtuse, and the underleayes are larger and less toothed. 
The cellular structure, however, agrees with that of typical speci- 
mens. 
