CHARACTERS OF TRIBES AND GENERA. 
appearance and venation it is evidently allied to Anapeltis ; 
but its linear oblique sori being special not formed by the 
confluence of punctiform receptacles is considered sufficient 
character to retain it as a distinct genus. 
Sp. M. persicarisfolia, Presl. 
Tribe 4.—HYMENOLEPIDE (Plate 4). 
Fronds simple or pinnatifidly lobed, the fertile wholly or `` 
partially contracted. Veins anastomosing. :Sori linear, 
continuous, transverse. 
Oss.—This Tribe consists of about a dozen or more 
species agreeing in general habit and venation with the ` 
sections Pleopeltidew and Phymatodec of the preceding tribe, — S 
less contracted, generally in the form of rachiform spikes, 
on which account several of the genera which I now place — 
here have been placed by authors in the genera Twnitis —— 
and Aerostichwm, such relationship being consequent on the 
fertile frond, or in some, the fertile portion only, being : 
contracted, thus bringing the normal punctiform recepta- 
cles so contiguous to one another as to form a general 
linear sorus; this view is borne out by fronds of some 
species bearing punctiform sori as well as linear. 
33. DRvMoGLossuM, Presl (1836). 
: Hook. Sp. Fil. ; Tænitis sp. auct. so 
Gaudiu slender snrculose. Fronds simple, entire, 14 to is 
. 4 inches long, of two forms, the sterile subrotund, elliptical, 
the fertile contracted, linear. Veins obscure ; venules com- 
undly anastomosing. Receptacles elongated, compital. 
Sori linear, continuous transverse, ultra pet aire 
with Melato iz indusioid acad 
differing only in the fertile frond being usually more or ` 
