68 16 



dine specimens. It is not fixed exactly in the centre; the sinus extends over the 

 middle and reaches nearly a shallow sinus on the opposite side of the indusium, 

 thus the indusium appears to be cleft into two halves. Fee's figure (Gen. Fil. tab. 

 23 B) gives a good illustration of an extreme form. A. Braun founded a new sec- 

 tion Dichasiiim on this character (Flora 1841 : 710), and Fi';e considered it being of 

 generic value. I can not at all agree in this; in young specimens the indusium 

 are of the common filix-mas type, but growing older it is cleft, before falling, in 

 the said manner. Still it seems to be a good specific character. 



D. paleacea varies in size and colour of the scales but is otherwise fairly 

 constant. It is apparently not rare in the Andes from Mexico to Peru and Bolivia; 

 it is found at high mountains of Jamaica and Haïti, and again in Southern Brazil. 

 The Hawaiian plant referred hereto, Lastrea Iruncala Brack., is scarcely identical. 



I have seen the following specimens : 



San Domingo: infra Valle nuevo, 1900 ra., Eggers nr. 2306 (B). 



Jamaica: Summit of Blue Mountain Peak, Ma.xon nr. 1411 (W := Underwood nr. 2M\); W. Harris 



nr. 7486 (W); Hart nr. 670 (W). 

 Mexico: Valle de Mexico, Schaffner nr. 8.'> (B|, Hartvveg nr. 570 (B), Uhde nr. 180 et 236 (B) — Foret 



de San Nicolas, Bourgeau nr. 1041 (B, H, W) — Pico de Orizaba, Liebmann nr. 2393 (H) 



— Oaxaca, Galkotti nr. 6348 (B = A. crinitum M. et G.) — Ehrenbfrg (B = A. paralle 

 logrammum Kze. — Hidalgo, Trinidad, Pringle nr. 8750 (B, H, W) — Ixtaccihuatl, C. A. 

 PuRPUS nr. 10 (W) — Oaxaca, Cerro de San Felipe, C. Gonzatti and V. Gonzalez nr. 530 

 (W) — Chiapas, San Cristobal, Collins and Doyle nr. 136 (W). 



Guatemala: Volcan de Agua, 33—3600 nr., Maxon and Hay nr. 3712 (W) — Depart. Quiche, San Mi- 

 guel Uspantan, 6000', Heyde et Lux, ed. Donn. Smith nr. 3244 (W). 

 Costa Rica: Forêts de Barba, Pittier nr. 1933 (B, W) — Cerro de Las Vueltas, Pittieu nr. 10604 (W) 



- El Paramo, Pittier nr. 10621 (W) — forêts de Copey, 2670 m, Tonduz nr. 11800 (W) — 

 J J. Cooper (W). 



Panama, Maxon nr. 5275 (W). 



Colombia, Hartweg nr. 1512 (B) — Boqueron-Bogota, Stübel nr. 457 (B) — Bogota, Karsten (Bj. 



Venezuela, prov. de Pamplona, Fungk et Schlim nr. 1372 (RB, L). 



Peru, DiiMBEY (B), Ruiz (B, W), Agapata, Lechler nr. 2020 (B). 



Bolivia, Mandon nr. 71 (B) — Tunari Mts., O. Kuntze (B) — M. Bang nr. 1784 (B, W). 



Argentina: Sierra de Tucuman, P. G. Lorentz (B). 



Brazil: Rio, Glaziou nr. 4432, 7333 B, H) — E. Brunet nr. 53 (B) — Serra de Itatiaia, P. Dusén nr. 



428 (Rg, W) — Theresopolis, Th. de Moura nr. 60 (B) — Minas Geraes, Caldas, Regnell nr. 



Ill 1451 b IB, Rg, W); Mosén nr. 2180 (H, Rg). 



4. Dryopteris mexicana (Pr.) C. Chr. comb. nov. — Fig. 1. 



Syn.: Nephrodiuin mexicanum Pr. Rel. Haenk. 1: 38, 1825 (non auctt.). 

 Aspidium flaccidum Fourn. Bull. Soc. Fr. 27; 328, 1880. 

 Nephrodiuin Fournieri Bak. Ann. Bot. ô; 317, 1891. 

 Dryopteris Fournieri C. Chr. Ind. 260, 1905. 

 The type-specimen of this species was collected in Mexico by Haenke. I 

 have seen in Herb. Presl a single leaf labelled: '^ Nephrodinm mexicanum Presl, 

 rel. haenk. I: In Mexico (Hænke)", which I regard as typical. It does not agree 

 with the forms generally referred to D. patula v. mexicana, but it is not essentially 



