CHARACTERS OF TRIBES AND GENERA, 101 
nacea (Don.) (v v.) (C. undulata, J. Sm.) ; C. longissima 
(Bl.) ; C. Zippelii (BL); C. Samarense, J. Sm. (Diblemma, 
J. Sm. 1841) ; C. tenulorus, J. Sm. ; C. superficiale (Bl.); 
C. erioides (Poir.) (Microsorum erioides, Link.) 
** Fronds lobed or pinnatifid. 
. . QC. tridactylon (Wall.); C. Labrusca (Hook.) ; C. spec- 
trum (Kaulf.); C. insigne (Bl.); C. dilatatum (Wall.); C. 
affine (DL) | 
17. Setuicvea, Bory. (1829). 
Grammites, Blume; Gymnogramma, Hook. Sp. Fil. 
Surculum slender, elongating, epigeous, and squamose, 
or sub-hypogeous and naked. Fronds stipate, 1 to 2 feet 
long, simple, linear lanceolate or broad elliptical, rarely 
pinnatifid, smooth, opaque, the fertile longer than the 
sterile, and often sub-contracted. Primary veins costeform, 
lets terminating in the areoles. Receptacles compital, | 
elongated, oblique, forming a continuous or sub-interrupted 
linear sorus between the primary veins. 
Type. Selliguea Feei, Bory. 
Illust. Hook. Grev: Ic. Fil. t. 5 and 6; Hook. Bot. 
Mag. t. 5328; Moore, Ind. Fil. p. 52 A.; J. Sm. 
Ferns, Brit. and For., fig. 23. 
` Oss.— The species comprehended under this genus agree 
dn many respects with Pleuridium, but are technically 
distinguished by the fertile fronds being generally sub- 
contracted, and the sporangia produced in a continuous 
ne parallel with and between each two of the primary 
veins; this linear form of the sori may readily be conceived 
to be formed by the complete confluence or union of the 
erassifolium or P. crassinervum; indeed, it is difjoult to 
* 
straight. Venules compound anastomosing, with free vein- — ee 
normal punctiform receptacles of such species as Pleuridium ` ` E 
