36 C. M. Cooke, Jr.—The Hawaiian Hepatice 
Subgenus Cephaloziella Spruce, 1882. 
Plants small or minute, often mixed with mosses or other hepatics: 
stems usually ‘robust, cortical and interior cells similar, in many 
subrhizomatous at the base, bearing flagella; leafy branches postical 
or more rarely lateral: lower leaves succubous, upper leaves crowded, 
transversely inserted, rarely exceeding the stem-in breadth, often 
cuneiform, bifid one-half or more, carinate, segments subcomplicate 
or diverging, entire or subdenticulate, rarely spinulose : cells small 
or minute, subquadrate : underleaves (when present) small, entire or 
bifid, sometimes present or lacking in the same species: 9 inflores- 
cence acrogenous, cladogenous, or variable in position ; bracts 
rather large, bilobed, lobes denticulate or spinulose ; bracteoles 
always present, connate with the bracts ; perianth narrow, rarely 
only 3-keeled, often 3- to 6-keeled in the same species, mouth den- 
ticulate, rarely ciliate: andreecium borne on stems or larger branches, 
intercalary or terminal, rarely amentiform ; bracts similar to stem- 
leaves, rarely smaller. 
Cephalozia Lile sp. nov. 
Puate XIII; riaures 10-20. 
Dioicous ? plants scattered, pale green: stems pale green or nearly 
colorless, branching postically, oval in section, about 5x7 cells, walls 
slightly uniformly thickened, internal and cortical cells similar, the 
latter in about 18 longitudinal rows, rhizoids long, colorless, scattered 
at the base of the stem or branches: leaves distant, obliquely-trans- 
versely inserted, widely spreading, slightly concave, ovate or sub- 
quadrate, equally bifid (about one-half), lobes entire, spreading 
triangular, acute, about 7 cells long, 5 cells broad, usually ending in a 
row of two cells; leaf-cells with slightly uniformly thickened walls: 
-underleaves wanting: 9 inflorescence borne on main stem or branch, 
often having innovations; @ bracts in one or two pairs; innermost 
bracts broadly ovate, bifid (about one-third), lobes triangular, acute, 
spreading irregularly denticulate; sinus acute; innermost bracteole 
shorter than bracts, highly connate on both sides, ovate, apex 
rounded, denticulate or bifid (about one-fifth), lobes apiculate, dentic- 
ulate, sinus obtuse; bracts of second row smaller, broadly ovate, bifid 
(about one-third): perianth ovoid-cylindrical, unistratose, terete 
below, many keeled above, mouth slightly contracted, irregularly 
lobed, lobes denticulate. 2 
