

MAXON — STUDIES OF TROPICAL AMERICAN FERNS. 21 



Polystichum sp. 



1 1. 1692. Near Purulha, Baja Verapaz, altitude 1,800 meters, April, 1907. 



Polystichum sp. 



II. 1090. Cohan, altitude 1,350 meters, May, 1907. 



This and the preceding number are of the variable and difficult group of /'. aculeatum, 

 of which 1 here are many described forms in Mexico and the American Tropics generally. 

 Except with very adequate material not now at hand, it is impossible, in the absence 

 of type specimens of the earlier and often imperfectly described species, to distinguish 

 these properly. 



Tribe DAVALLIEAE. 



Dennstaedtia adiantoides (II. & H.) Moore. 



II. 424. Cubilquitz, altitude 350 meters, July, 1907. 



Received as Dennstaedtia apiifoliu (Hook.) Moore. Captain Smith's 8047 from the 

 same locality is the same. 



Dennstaedtia cicutaria (Sw.) Moore. 



II. 2376. Cohan, altitude 1,550 meters, June, 1908. 



Dennstaedtia sp. 



II. 1328. Coban, altitude 1,350 meters, November, 1907. 



Received under the name Hypolepis repcns. A species of Dennstaedtia, allied to 

 J), exaltata (Kunze) Hieron. and probably undescribcd. Itis matched exactly by the 

 following specimens in the U. S. National Herbarium, all from Mexico: District of 

 Cordoba, Vera Cruz, //. Fini 14 (several sheets). Valley of Cordoba, February 24, 

 1866, Bpurgeau 1941. Region of Orizaba, June 9, 1866, Bourgeau 2342. 



The last number is cited by Landman « under Dennstaedtia tenera, a reference which 

 seems to the writer incorrect. 



Dictyoxiphium panamense Hook. 



II. 54. Cubilquitz, altitude 350 meters, July, 1907. 



Nephrolepis biserrata (Sw.) Scbott. 



II. 480. Cubilquitz, altitude 350 meters, July, 1907. 



Saccaloma inaequale (Kunze) Mett.? 



II. 2026. Forest near Coban, altitude 1,600 meters, November, 1907. 



One of the forms included under this name; recently described as vur. dimorphum 

 Christ. 



HYMENOPHYLLACEAE. 



Hymenophyllum asplenioides Sw. 



II. 1894. Near Coban, altitude 1,550 meters, August, 1907. 



Hymenophyllum lanatum Fee. 



Ii. L938. Cohan, altitude 1,350 meters, August, 1907. 



Hymenophyllum microcarpum Desv. 



II. 1984 and II. 1985. Near Coban, altitude 1,600 meters, November, 1907. 



Hymenophyllum pannosum Christ. 



II, 1509. At the highest elevation between Coban and Tactic, Alta Verapaz, 

 altitude 2,000 meters, December, 1907. 



II. 15)36. I'pon a tree trunk near San Juan de Chameleo, Alta Verapaz, altitude 

 1,800 meters, September, 1907. 



Hymenophyllum polyanthos Sw. 



II. 1903. Near Cohan, altitude 1,350 meters, August, 1907. 



"Ark. Hot. 1: 194. 1903. 



