114 
reddish-brown, flat, glabrous indusium, which is about 2—3 mm broad, reniform 
with the sinus generally distinct. Sporangia with a long, slender pedicel, glabrous. 
Spores with a broad, very finely and densely papillose, irrigularly crested episporium. 
The here described typical form is apparently confined to Jamaica, where 
according to JENMAN (W. Ind, and Guiana F. 225) it is only found in high elevations 
(5000—7000). 
Fig. 25. Tertiary pinnule of varieties of D. denticulata (Sw.) O. Ktze., nat. size. 
a. f. genuina, b. var. barbensis, c. var. dissecta, d. f. 6 (Moritz n. 264). 
Jamaica: Eacers nr. 3644 (B, RB, W); Maxon nr. 1230 (RB, W = Unperwoop nr. 2352), 1353 (W), 
- 1424 (W = UnpErwoop nr. 2543), 2632 (CC, Rg. W), 2735 (W), Unperwoop nr. 543 (B, W); Hart 
mr. 24 (W): Cxure nr. 178 (W); Day nr. 278 (B); M. D. Watt nr. 207 (R, RB); W. Harris nr. 7122 
(H, W); O. Hansen nr. 27 (B). 
Hooker's and JENMAN’s variety rigidissima from Jamaica I have described 
below as a valid species, although it is possible that further material will prove it 
to be a form of D. denticulata growing in exposed situation, 
£2 A form with a more open and less rigid lamina, the ultimate segments 
oe more oblong and the sori much smaller than in f. genuina; in habit more resembling 
ae: “some of the continental forms. 
__ Haiti prope Furey, 1500 m.; Picarpa nr. 232 (B). 
