Note on Po.typopium 51 
in the concept of this species a closely related but very 
distinct plant described from the high mountains of 
Jamaica, nearly forty years ago, as Polypodium albo- 
punctatum Baker,? and apparently confined to that 
region. Baker’s name being invalidated by Polypodium 
albopunctatum Raddi,‘ applied to a Brazilian plant of the 
Goniophlebium group, the new name Polypodium cre- 
tatum is here proposed for the Jamaican species, in allu- 
sion to the thin chalk-like scales which overlie the 
hydathodes on the upper surface of the leaf segments. 
Of Polypodium cretatum the following specimens, all 
Jamaican, are in the National Herbarium: Upper slopes 
and summit of Sir John’s Peak, Underwood 3181, 3187, 
3199, 3203; slopes of Monkey Hill (above New Haven 
Gap), alt. 1800 meters, Maxon 2702, 2754; near Mabess 
River, alt. 900 meters, Mazon 1570; without special 
locality, Hart 71. These agree essentially with Baker’s 
original description, also with Jenman’s redescription® 
of P. albopunctatum Baker. 
Polypodium subtile Kunze is known to the writer from 
" several fragments of the type collection (Moritz 325) 
in the Underwood herbarium and from two additional 
collections, both of which agree with the type. The 
first is a Colombian plant (Lehmann 7381), cited as P. 
subtile by Hieronymus;® the other consists of excellent 
Guatemalan specimens collected by von Tuerckheim 
(J. D. Smith 964), distributed as P. albopunctatum 
Baker. From these it is seen that P. subtile differs 
rather noticeably from P. cretatum, (1) in its copiously 
long-pilose fronds, the hairs stramineous to pale reddish, 
1.5 to 2.5 mm. long (not stiff, reddish brown, averaging 
1 mm. long); and (2) in its few, rather large basal seg- 
ments, these abruptly discontinuous (not gradually 
? Journ. Bot. Brit. & For. 15: 265. 1877. 
, Opus. Sci. Bol. io 287.1 
5 Bull. Bot. Dept. 2 4: 116. 1897. 
* Bot. Jahrb. pget 24: 1905. 
