31 277 



rachis vary considerably. In the original specimen of P. retusiitn S\v. the rachis is 

 densely furnished with patent, soft, whitish hairs, while var. aiistrobrasiliensis Ros. 

 has its rachis densely pubescent with sliort hairs. 



All things considered my opinion of these forms is: Pol. pubescens Raddi 

 comes very near to the true D. oligocarpa; P. retiisiim Sw. is an extreme form, 

 connected witli P. pubescens b}' numerous intermediates, marked by its very obtuse 

 segments and soft hairy rachis. 



A form somewhat more different is described by Lindman as Polypodium pu- 

 bescens Raddi (Arkiv for Bot. 1: 228. 1903). It resembles in habit D Mosenii, but it 

 has an erect rliizome and is not suddenly reduced downwards. The basal segments 

 of the lower pinnæ are considerably reduced, underside eglandulose. I provisionally 

 consider this as a variety of D. oligocarpa, although it is probable that it represents 

 a good species. 



Minas Geraes: S. Joao d'El-Rei, leg. Lindman n. A. Ill (HS). 



Some of the specimens mentioned by Rosenstock, Hedwigia 46: 123 are also 

 different, for instance Spannagel n. 95, while n. 97 seems to me to be the same as 

 P. retusum. 



Besides the specimens enumerated by Rosenstock, 1. c, under his D. relusu 

 var. austrohrasiliensis I have examined the following : 



In HC: Minas Geraes: Sta Rita de Ibitipoca, Schwacke n. 12337. — Arraial 

 de Ibitipoca, 810 m., Schwacke n. 12314. — Serra de Lavras, Schwacke n. 12252. — 

 Ouro Preto, Schwacke n. 12438, 13444, 13846, 14007; Gomes n. 309. - Minas, 1000 m., 

 Schwacke n. 13525. - Mono de S. Sebastiào, Silveira n. 2983. 



In HB: Exp. Novara, leg. Ilinek n. 172. — Burchell n.3706; Lindberg; Sellow; 

 ?Glaziou n. 7306. Serra dos Orgaos, Vauthier. 



In HH: Minas Geraes: Lagoa Santa, Warming. 



In HS: Minas Geraes: Caldas, Regnel! n. III. 1446 b. — Rio: Corcovado, 

 Mosen n. 2698. 



6. Dryopteris pilosula (Kl. & Karst.) Hieron. Hedwigia 46: 332. 1907. 



Syn: Aspidium pilosnlnm Klotzsch & Karsten; Kunze, Linnaea 23: 229. 1850; 

 Mett. Fil. Lips. 90. 1856; Nephrodhim pilosuluni Hk. sp. 4: 102. 1862. — Aspidium 

 strigosum Christ, Bull. Soc. Bot. Belg. 35: 210. 1896 (non Willd.); A. Alfarii Christ, 

 Bull. Boiss. II. 5: 259. 1905; Dryopteris Alfarii C. Chr. Ind. 251. 1905. 



Type specimen in HB! from plants cultivated in Hort. Berol. and Hort. 

 Lips., originally sent from Columbia. 



Specimens examined: 



Mexico: Chiapas, G. Munch n. 85 (HC). 



Guatemala: Alta Vera Paz, Tiirckheim n. 168 (HC).— San Miquel Uspantan, 

 Heyde & Lux ed. Donnell Smith n. 3245 (HB). 



Costa Rica: J. J. Cooper ed. Donnell Smith n. 6027 (pt.) (HC). — Cartago, 

 Pitlier n. 1823 (HC = A. Alfarii Christ). 



