28 CO. M. Cooke, Jr—The Hawaiian Hepatice 
minute ; the innermost bracts the largest, about twice the size of 
an underleaf, broadly ovate, denticulate, apex obtuse ; cells verru- 
_culose ; bracteoles similar to bracts but narrower: perigynium unde- 
veloped. 
Stems 0.27" in diameter; leaves 0.7™x0.6™™. to 0.9™™x077"; 
underleaves 0.2™"x0.4™ ; leaf-cells at apex 25, at middle of base 
55yX30p, at antical margin 45yx18y; bracts 0.6™™x0.45™™, 
West Maui (Baldwin). Oahu: Konahuanui (Cooke). Hawaiian 
Islands (Herb. Spruce). 
KY. Baldwinii is very close to A. nephrostipa Spruce, of South 
America. The leaves of the latter are more densely imbricated, 
longer in proportion to their breadth, the apex is usually crenulate, 
the cells have thicker cell-walls which are not verrucose, and the 
underleaves are broader and more deeply bifid. 
Compared with A. cespitosa Spruce, of South America, A. Bald- 
winit has the following differences: the plants are smaller; the 
stems branching much less frequently ; the leaves are smaller and 
less imbricated, and the apex not so rounded ; the leaf-cells have 
thinner cell-walls and smaller trigones ; the underleaves are much 
smaller and broader in proportion to their length. 
Odontoschisma Dumort., 1835. 
Plants medium-sized, green, sometimes reddish, rarely white, grow- 
ing in broad, flat mats, often mixed with mosses or other hepatics : 
stems strong, subterete, either prostrate or arching at intervals 
and free from the substratum; flagella postical or terminating 
leafy branches; leafy branches usually postical, similar to the 
stem: leaves obliquely to nearly longitudinally inserted, broadly 
ovate or suborbicular, retuse or rarely emarginate, usually concave 
and entire ; cells rather small to minute, isodiametric, often with a 
verruculose cuticle : underleaves commonly minute and soon obso- 
lete : Qinflorescence cladogenous; bracts bifid, rarely trifid or 
quadrifid; bracteoles always present; perianth large, narrow, mouth 
ciliate to denticulate: capsule cylindrical-oblong, in other character- 
istics agreeing with that of Cephalozia: andrecium postical, small, 
amentiform, colorless, rarely larger and terminal. 
Leaves strongly concave. O. subjulaceum. 
Leaves slightly concave, more often spreading. 
Plants rather large; leaves longer than broad, trigones small or lacking. 
O. Sandvicense. 
Plants slender; leaves usually broader than long, trigones large. 
VO. gracile. 
