NO. 1867 AMERICAN FERNS— CHRISTENSEN 379 



be mentioned here that while most of the Jamaican forms are nearly 

 glabrous, the specimens from other islands, especially from Porto 

 Rico and partly from Cuba are rather hairy, and that this pubescence 

 is found both in the small, more typical forms and in the var. Bal- 

 bisii. The specimen from Guatemala appears to be identical with 

 the Jamaican type. In the numerous specimens seen the sori are 

 apparently exindusiate. 



The different forms may be arranged as follows : 

 A. Small forms, often only a few cm. high; pinnae unequal- 

 sided ; stem very short. 



1. var. typica. Leaf quite glabrous or rachis only finely pubescent. 



Jamaica: Various localities, Maxon 1468 (= Underwood 2481), 1496, 

 1559, 1829 i=l'nd. 2794), 1959, 241S, 2550, 2584 (large) ; Underwood 

 1430, 1908, 2492; Clide 252. 



Cuba: Wright 814. Slopes and summit of El Yunque near Baracoa, 

 Pollard and Palmer 125. Monte Verde, Yateras, Oriente, 575 meters, 

 rocky bank of small stream in forest, Maxon 4313. 



Santo Domingo : In umbrosis ad Rio Mameges, 250 meters, Eggers 2780. 



Porto Rico : Road from Utuado to Arecibo, wet limestone rocks, Under- 

 wood and Griggs 822, 828. 



Guatemala: Cubilquitz, Depart. Alta Verapaz, 350 meters, von Tucrck- 

 heiin (Donnell Smith 8353). 



2. var. hirta (Jenman) C. Chr. 



Nephrodium sanctum var. hirtum Jenman, Bull. Bot. Dept. Jam. II. 3:20. 

 1896. 



Upper surface finely pubescent. 

 Jamaica: Doll Wood, near Silver Hill Gap, 3.000 ft., wet shaded cliff, 

 Maxon 1175. Blue Hole, Fredholm 3191. 



3. var. strigosa C. Chr., var. nov. 



Rachis and costa rather densely furnished with patent hairs; 

 surfaces glabrous. 



Cuba : Mountain slope, directly north of Jaguey, 420 to 500 meters, rocky 

 bank by stream, Maxon 4142, type; U. S. National Herbarium, No. 

 522848. Josephina, north of Jaguey, Yateras, Oriente, 575 meters, 

 bank by small stream at border of fore?t, Maxon 4096 (large form). 

 Porto Rico: Eastern slope of the Luquillo Mts., 1,500 ft., Heller 4614- 

 Sierra de Luquillo, in monte Jimenis, Sintenis 1753. 



B. Large forms ; largest pinnae equal-sided, pinnate below ; seg- 

 ments or pinnules long, linear; stem up to 10 cm. or more long. 



I. var. magna (Jenman) C. Chr. 

 Nephrodium sanctum var. magnum Jenman, Bull. Bot. Dept. Jamaica II. 3:20 



