238 186 



Identical with the type in most characters, differing by a longer stem (up to 

 5 dem long), the very slender rachis, which is practically quite glabrous (only stel- 

 late hairs above), and the almost glabrous leaf. Sori yellow, apparently exindusiale. 

 Rachis as a rule with gemmae and in some specimens gemmae also on the costæ of 

 the pinnae above. 



Rio Grande do Sul: Silveira Martins, Lindman nr. A 1311 (Rg, W) — Campeste dos Sairaes, C. Jür- 

 gens, Rosknstock: Fil. austr. bras. exs. nr. 375 (B, R, Rg) — Sta. Cruz, Jürgens nr. 200 

 (R); ibid., Rosenstock: Fil. austr. bras. exs. nr. 86 (B, R) — Porto Alegre, Malme nr. 1441 (Rg). 



Sao Paulo: Rio Tieté, Gerder nr. 82 (Rj. 



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 pinnæ, 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, Wett.stein & Schii-fner (bb. Wien!) — Tieté, Gerder nr. 85a (R). 

 Rio Grande do Sul: Sta. Cruz, Jürgens, ed. Rosenstock: Fil. austr. bras. e.xs. nr. 87 (R, Rg). 



With this variety agrees closely an authentical specimen of Dryopteris bifrons 

 Christ in Fedde, Repert. G: 350. 1909, which was collected by Rojas in Paraguay, 

 ed. Hassler nr. 10455 (RB!). The indusium is very small and bears some few long 

 stiff setae. Another specimen from Paraguay: Cordillera de Altos, Fiebrig 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 1). scabra var. Caesariana. 



237. Dryopteris monosora (Pr.) C. Chr. Biolog. Arbejder tilegn. Eug. Warming 



84. 1911. - Fig. 33. 



Syn. Pohjpodiiim monosorum Presl, Tent. 181. 1836 (nomen). 

 Lastrea monosora Presl, Epim. 36. 1849. 

 Aspidium monostichum Kze.; Metl. Aspid. nr. 228. 1858. 

 Dryopteris tristis part. C. Chr. Ind. 298. 1905. 

 Type from Rio leg. Pohl (Herb. Presl!). 



A distinct species, improperly referred to 1). trisits by Baker in Flor. bras, and 

 Syn. Fil. It resembles 1). tristis in the cuneale base of the lower pinnæ, but dilfers 

 by its creeping rhizome, pinnatifid apex and by the presence of small scales on 



