CHARACTERS OF TRIBES AND GENERA. 
. Ilust. Hook. and Bauer, Gen. Fil., t. 15 ; Hook., Gard. 
Ferns, t. 31; Moore, Ind. Fil., p. 88 A; J. Sm 
Ferns, Brit. and For., fig. 122 ; Hook., Syn. Fil., t. 2, 
fig. 15. 
Oss.— This genus consists of a solitary species, a native 
of New Zealand, which in habit is similar to some species 
of Davallia as originally characterised, but more especially 
to the species placed under Microlepia; but differs in its 
sporangia being imbricate, round a columnar receptacle, 
Similar to the genus Trichomanes. This, with the ob- 
liquity of the ring, renders Lowsoma of some importance 
as a connecting link between the present tribe and 
. Trichomanes. : 
Sp. L. Cunninghami, R. Br. (v v-), Comp. Bot. Mag. 2, 
366, t. 31—32. : - 
H 
145.—Oponrosorta, Presl (1836.) 
Davallia, sp. auct.; Hook. Sp. Fil. ; Stenoloma, Fée. 
Vernation sarmentose, contiguous, sub-fasciculate, or 
distant. Fronds bi-tripinnatifid, lanceolate or deltoid, — . 
1 to 2 and 3 feet in length, or indefinite ; ultimate seg- 
ments cuneiform, entire, lobed or laciniated. Veins 
dichotomously forked, venules free. Receptacles terminal, 
punetiform. Sori simple or binate. Special and accessory 
indusia forming a vertical, urceolate, OT, by confluence, 
oblong, sporangiferous, marginal cyst. 
Type. Davallia tenuifolia, Sw. 
Ilust. Hook. and Grev. Ic. Fil., t. 238 and 194; J. Sm., 
Ferns, Brit. and For., fig. 120. 
Oss.—This genus consists of about a dozen species, —— 
widely distributed throughout the tropics of botli hemi- —— 
spheres. They form two distinct groups, the first having — : 
