MAXON — STUDIES OF TROPICAL AMERICAN FERNS. 6 



Marattia weinmanniaefolia Liebm. 



II. 2094. Near Coban, altitude 1,600 meters, January, 1908. 



Agreeing perfectly with a type specimen of Liebmann's in the TJ. S. National 

 Herbarium, collected in forests between Donaguiaand Roayaga, Oaxaca, at an altitude 

 of from 1,200 to 1,500 meters. 



No. II. 2094 was distributed as M. alata. 



SCHIZAEACEAE. 

 Lygodium sp. 



II. 1695. Above Panzal, Baja Yerapaz, altitude 1,300 meters, April, 1907. 



GLEICHENIACEAE. 



Dicranopteris fulva (Desv.) Underw. Bull. Torr. Club 34: 255. 1907. 

 Mertensia fulva Desv. M6m. Soc. Linn. Paris 6: 201. 1827. 

 II. 1313. Coban, altitude 1,350 meters, August, 1907. 

 Distributed as Gleichenia pubescens H. B. K. 



CYATHEACEAE. 



Alsophila bicrenata (Liebm.) Fourn. 



II. 1454. Forest near Cubilquitz, altitude 350 meters, October, 1906. 



II. 2088. Coban, altitude 1,350 meters, January, 1908. 



Dissimilar as these two numbers appear to be at first glance, there is little doubt that 

 they are forms of the same species. They have been carefully compared with a type 

 specimen of bicrenata in the National Herbarium, collected by Liebmann in Oaxaca. 

 No. II. 2088 agrees with this rather more closely than does no. II. 1454, differing, 

 however, in having the segments a little closer and the veins mostly several times 

 forked. But these seem to be characters due to its lesser degree of fertility, for where it 

 is fertile the veins are mostly ome forked, as in the type specimen and in no. II. 1454. 

 The presence of bullate scales upon the costa- and costuke, apparently a variable 

 character, is more pronounced in 1 1 . 2088, in which this number agrees perfectly with 

 the type specimen. 



Alsophila godmani Hook. 



II. 1655. Coban, altitude 1,550 meters, March, 1907. 



The present specimen, which is from the type locality, represents an uncommonly 

 fertile state of the species, having 5 or 6 pairs of sori to each segment; otherwise it is 

 like Captain Smith's no. 1007, which answers perfectly to the original description, 

 having but a single pair of sori to each segment. No. 1007 is said to have come from 

 Pansamala, altitude 1,200 meters, August, 1886; but some of the specimens have the 

 original label reading "Im Walde bei Coban; 4600 / ; Jan., 1888." 



The species is apparently a variable one and must be studied in comparison with 

 A. bicrenata (Liebm.) Fourn., or at least with the specimens passing under that name. 



Alsophila salvinii Hook. 



II. 2027. Mountain forests near Coban, altitude 1,600 meters, December, 1907. 



Alsophila schiediana Presl. 



II. 14r>5. Forests near Cubilquitz, altitude 350 meters, October, 1906. (Received 

 under the name Alsophila bicrenata Fourn.) 



Cibotium guatemalense Reich, f. 



II. 2113. Rio Krio, near Santa Cruz, Alta Verapaz, altitude 1,500 meters, February, 



1908. 



Captain Smith's no. 1505, collected at the same locality in April, 1889, is the same. 

 Both were distributed as Cibotium schiedii. 



