of the Tribe Trigonanthee. 
(ol) 
ever, the postical branches are exogenous in origin and are borne 
at the side of a reduced underleaf. The branching of Cephaloziella 
approaches that of some of the Epigonianthez. 
Leaves are always present, though sometimes restricted to the 
sexual branches. They are usually alternate, rarely opposite, and 
are incubous, succubous or transverse. They exhibit various forms, 
being sometimes undivided and sometimes deeply parted, while their 
margins are entire or denticulate. The leaf-cells vary considerably 
in size in the different species and their walls are variable in thick- 
ness. Trigones may usually be demonstrated and are sometimes 
very large. Underleaves are usually present, though absent in cer- 
tain species ; they are minute to very large, in Lepidozia and Acro- 
mastiguin being nearly equal in size to the leaves. 
The inflorescence is usually dioicous, but is sometimes autoicous, 
and rarely paroicous or heteroicous. The @ bracts are tristicous in 
two to six series; they are broadly to narrowly ovate, deeply bifid 
to quadrifid and are usually larger than the leaves ; sometimes they 
are highly connate with the bracteoles. The apex of the perianth is 
somewhat constricted, and the mouth is entire, dentate, ciliate or 
laciniate. The calyptra is pyriform and sometimes fleshy. The 
capsule is subglobose to subcylindrical, borne on a short or long 
stalk, four-valved to the base, two to five cells thick, the innermost 
cells being armed with semiannular thickenings. The spores are 
minute, round, and smooth or verruculose. The andreecium is most 
often a short postical branch, but is sometimes terminal or intercalary 
on a leafy branch or on the main stem. The bracts are usually orbic- 
ular to ovate, closely imbricated, sometimes subcomplicate. The 
antheridia are usually solitary, but in certain species of Bazzania 
occur in pairs. 
Key to the Hawaiian Genera of the Trigonanthee. 
Vegetative and specialized branches usually postical (sometimes lateral in 
Cephaloziella). 
Perianth present ; leaves succubous or transversely inserted. 
Leaves succubous, undivided. Odontoschisma. 
Leaves succubous or transversely inserted, bilobed. Cephalozia. 
Perianth lacking, sporophyte developing instead within a cylindrical peri- 
gynium ; leaves incubous. Kantia. 
Vegetative branches usually lateral, specialized branches postical. 
Stems pinnately branched, often plumiform, in a few species bearing 
postical, endogenous flagella ; leaves deeply lobed or parted ; under- 
leaves nearly as large as leaves. Lepidozia, 
