DESCRIPTIONS OF THE SPECIES 
IOI 
six pairs of veinlets meeting below the sinus. Sori small or 
rather irregular, situated on the veinlets close to the mid-rib 
of the lobes. Indusium not present. 
Dryopteris silvatica (P. and R.). C. Chr. Index , 292, 1905. 
Polypodium unitum. Hk. Sp. 5, 5 ; Hk. and Bkr, Syn. Fil. 317 ; 
Wood’s Natal Ferns , 31; Buchanan’s List, 97; Sim, Ferns of 
S. Africa, 1st ed., 193. 
Phegopteris unita Mett. Kuhn, Fil. Afr. 124. 
Gymnogram?ne unita. Kze, Linnaea, 18, 115. 
Goniopteris sylvatica. Pappe and Rawson, 39. 
Natal and Cameroons only, growing in shady ravines. 
Natal. — (Gueinzius, Bolus, 3980), abounds at Inanda inland (Wood); 
common at Umpumulo, 2000 to 3000 feet (Buchanan) ; Maritzburg, 
Zwaartkop, Great Noodsberg, Fort Buckingham (McKen) ; Buc- 
cleuch (W. Leighton) ; Benvie (Marriott). 
Transvaal. — Shilouvane (Junod 884). 
Rhodesia. — Umtali (Mrs Bennett). 
24. Dryopteris thelypteris (Linn.) A. Gray. 
Plate 16. Nat. size, barren, b Fertile, c Barren, pinnules 
showing venation. 
Rhizome long, slender, branching, wide creeping, sub- 
terranean. Frond herbaceous, two-pinnatifid, glabrous, ovate- 
lanceolate or lanceolate, one to two feet long, three to six 
inches broad, with a slender naked stipe, often one foot 
long, and a glabrous, slender rachis. Pinnae opposite or 
alternate, the lower about as long as the others, but more 
scattered; sessile, bluntly lanceolate, divided to near the 
mid-rib into close, rounded, entire, rather unequal pinnules ; 
the lower pinnule above and below often rather longer, and 
crossing the rachis obliquely. Fertile frond, or fertile pinnae, 
with the margin recurved so that the pinnules look rather 
narrower and more triangular. Veinlets free, mostly forked 
in the barren pinnules. Sori small, almost marginal ; in- 
dusium small, deciduous, ciliated, glandular. 
Var. ft SQUAMULIGERUM (Schl.) has the mid-rib of the 
pinnae scaly with short, wide, whitish scales, and to it all 
the South African specimens I have seen belong. Kuhn 
credits this variety to South Africa and New Zealand only. 
