MAXON — STUDIES OF TROPICAL AMERICAN FERNS. 17 



Diplazium werckleanum Christ, 



II. 1680. Panzal, Baja Verapaz, altitude 1,000 meters, in forest, April, 1907. 



II. 1310. Near Coban, altitude 1,350 meters, February, 1908. 



Both specimens were received under the name A. verapax Donn.-Sm. 



Loxogramme salvinii (Ilook.) Maxon. 

 Grammitis salvinii Ilook. Second Cent. Ferns pi. 11. 1861. 

 Gymnogramme (Selliguca) salvinii Hook. Sp. Fil. 5: 157. 1864. 

 II. 2378. Coban, altitude 1,600 meters, June, 1908. Epiphytic. 

 In addition to this the following specimens from Alta Verapaz are in the National 



Herbarium: 



Pansamala, altitude 1,140 meters, von TiLrckheim (J. D. 8. 962). Trail between 

 Sepacuite and Secanquim, altitude about 1,000 meters, on tree trunks in 

 humid forest, Maxon & Hay 3262. Trail from Esperanza to Purulha, depend- 

 ing from partially shaded rocks, Maxon & Hay 3359. 

 Christensen regards this as referable to Fee's Selliguea mexicana of earlier date 

 (Polypodium mexicanam C. Chr.), but Fee's description and figure are far from applying 

 to the Guatemalan plant. The two species are of interest as being the only represen- 

 tatives of an otherwise exclusively Old World genus. The nonarticulate fronds are 

 sufficient to exclude them from Polypodium, even in its widest sense. 

 Stenochlaena latiuscula Maxon, Contr. Nat. Herb. 10: 502. 1908. 



1 1 . 1901. Epiphytic in forest near Cubilquitz, altitude 350 meters, August, 1907. 

 This species, the type of which is from Costa Rica, was known previously from 

 Guatemala upon specimens distributed by Captain Smith under no. 1129. The pres- 

 ent specimens have the fertile pinnae narrower and up to 15 cm. long. 



Struthiopteris ensiformis (Liebm.) Broadhurst, in herb. 



Lomaria ensiformis Liebm. Vid. Selsk. Skr. V. 1: 234. 1849. 



Blechnum ensiformis C. Chr. Ind. Fil. 153. 1905. 



II. 1693. Forests near Purulha, Baja Verapaz, altitude 1,800 meters, April, 1907. 



According to Christensen, known previously only from Mexico. The grounds for 

 using the generic name Struthiopteris in this connection will be recapitulated by Miss 

 Broadhurst in a forthcoming revision of the North American species usually placed 

 under Lomaria. 



Woodwardia spinulosa Mart. & Gal. 



II. 1537. Mountains between Tactic and Coban, altitude 1,800 meters, December, 



1907. 



Tribe DRYOPTERIDEAE. 



Dryopteris ampla (II. & B.) Kuntze. 



1 1. 21 18. Near Coban, altitude 1,350 meters, March, 1908. 



Dryopteris formosa (F6e) Maxon. 



Aspidiumformosum Fee, Gen. Fil. 296. 1850-1852, in part. 



II. 1678. Forest between Purulha and Panzal, Baja Verapaz, altitude 1,500 

 meters, April, 1907. 



II. 1854. Mountain woods near Coban, altitude 1,600 meters, November, 1907. 



The synonymy of the present species is much confused . The original A.formosum 

 of Fee included two Mexican numbers and one from Cuba. Later, and upon the 

 same specimens, Fee divided the species into two, separating the Cuban and one 

 of the Mexican plants under the name Aspidium jucundumA Thus, by elimination, 

 the name formosum attaches to the remaining Mexican plant, a species which ranges 



" Fee, lOme Mem. 41. pi. 42./. 1- 1865. 



