238 186 
Identical with the type in most characters, differing by a longer stem (up to 
5 dcm long), the very slender rachis, which is practically quite glabrous (only stel- 
late hairs above), and the almost glabrous leaf. Sori yellow, apparently exindusiate. 
Rachis as a rule with gemme and in some specimens gemme also on the coste of 
the pinna above. 
Rio Grande do Sul: Silveira Martins, LiNpMaN nr. A 1311 (Rg, W) — Campeste dos Sairaes, C. Jón- 
GENS, RoskNsTOCK: Fil. austr. bras. exs. nr. 375 (B, R, Rg) — Sta. Cruz, JóncENSs nr. 200 
(R); ibid., RosENsTOcx: Fil. austr. bras. exs. nr. 86 (B, R) — Porto Alegre, MALME nr. 1441 (Rg). 
Sao Paulo: Rio Tieté, GEnpEn nr. 82 (HR). 
To this variety I also refer the majority of the specimens by RosENsTOCK named 
D. pseudotetragona var. gemmulifera Hier. with the forma major (Hedwigia 46: 119). 
Some of them are larger and of a more firm texture and a greyish colour, but they 
do not differ materially probably; they are old stages of the common form. 
var. Caesariana (Christ). 
Syn. Aspidium Caesarianum Christ, Denkschr. Akad. Wien 69: 14. (1906) 1907 
tab.3 fig. 1. 
Differs from the type and the var. incompleta by the less incised pinnz, seg- 
ments close, acute; 2 pairs of veins connivent to sinus. Resembles in habit per- 
fectly D.lugubris var. devolvens from which it differs in pubescence. 
Sao Paulo: Cerqueira Cesar, 500 m, WErrTsTEIN & ScHIFFNER (hb. Wien!) — Tieté, GerpEr nr. 85a (R). 
Rio Grande do Sul: Sta. Cruz, JüncENs, ed. RosENsTock: Fil. austr. bras. exs. nr. 87 (R, Rg). 
With this variety agrees closely an authentical specimen of Dryopteris bifrons 
Christ in Fedde, Repert. 6: 350. 1909, which was collected by Rosas in Paraguay, 
ed. Hasster nr. 10455 (RB!). The indusium is very small and bears some few long 
stiff setze. Another specimen from Paraguay: Cordillera de Altos, FrEBRIG nr. 95 
(B) is the same. It is a large form, leaf said to reach 1—1,2 m, and the rachis is 
richly bulbilliferous, but it does not differ materially from D. scabra var. Caesariana. 
237. Dryopteris monosora (Pr.) C. Chr. Biolog. Arbejder tilegn. Eug. Warming 
84. 1911. — Fig. 33. 
Syn. Polypodium monosorum Presl, Tent. 181. 1836 (nomen). 
Lastrea monosora Presl, Epim. 36. 1849. 
Aspidium monostichum Kze.; Mett. Aspid. nr. 228. 1858. 
Dryopteris tristis part. C. Chr. Ind. 298. 1905. 
Type from Rio leg. Pont (Herb. PnEsr!). 
A distinct species, improperly referred to D. trisits by Baker in Flor. bras. and 
Syn. Fil. It resembles D. tristis in the cuneate base of the lower pinnz, but differs 
by its creeping rhizome, pinnatifid apex and by the presence of small scales on 
