552 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
As may be noted from the key, however, the relationship of P. basiattenuatum 
with P. truncicola is not a very close one, the rhizome scales of the former 
entirely lacking the bristle-like cilia characteristic of P. truncicola. The 
latter is also in every respect a much coarser plant. Polypodium basiatienu- 
atum grows in association with P. trichomanoides, but the two may be distin- 
guished at a glance. 
The following specimens are in the U. 8. National Herbarium: 
JAMAICA: Summit of Blue Mountain Peak, alt. 2,000 to 2,200 meters, on 
mossy trunks and branches of trees, Maxon 1475, 1511, 1515; Under- 
wood 1452, 1462. Slopes of Monkey Hill (above New Haven Gap), alt. 
1,800 meters, Maron 2573. Summit of Sir Johns Peak, alt. about 1,900 
meters,. Underwood 3188. Without locality, Hart 69. 
EXPLANATION OF PLATE 36.—Characteristic specimens of Polypodium basiattenuatum 
(Underwood 1462, U. 8. Nat. Herb, no. 521277). Natural size. 
17. Polypodium sherringii Baker, Journ. Bot. Brit. & For, 20: 826. 1882. 
Type LocALiry: Newton district, Port Royal Mountains, Jamaica (Sherring). 
DISTRIBUTION: Port Royal Mountains, Jamaica, altitude 1,200 to 1,500 meters. 
The actual type of this species, which is at Kew, has not been seen by the 
writer, but there are photographs in the U. 8S. National Herbarium, the Under- 
wood Herbarium, and the Herbarium of the Department of Agriculture at 
Hope Gardens, near Kingston, Jamaica, as well as an incomplete specimen in 
the Underwood Herbarium, presumably of the type collection,’ from which a 
fairly complete description has been drawn for the North American Flora. 
It appears that this species is a close ally of P. basiattenuatum, from which 
it may be separated by the characters given in the key. 
Jenman, who also has redescribed? P. sherringti, writes of its relationship, 
as follows: 
Rare at 4,000-5,000 ft. altitude in the Port Royal Mountains in the Newton 
district on boughs of forest trees. This resembles basiattenuatum in the 
entire rounded lobes, decurrent and dwindling at the base of the fronds, but 
is more densely tufted, with short stiff coriaceous fronds, which are much 
less ciliate. The fronds are erect or erecto-spreading and are so stiff that in 
course of time the pagina decays, leaving the rigid black midribs standing 
mixed with the growing fronds. The rootstock in the specimen before me 
forms an upright tuft of matted fibres nearly finger thick. 
18. Polypodium andinum Hook. Second Cent. Ferns pl. 6. 1860. 
TYPE LOCALITY: Banks of the Rio Hondacha, Andes of Peru (Jameson 780). 
DISTRIBUTION: Mountains of Ecuador, Peru, Colombia, and Costa Rica, 
ascending to at least 2,000 meters. 
ILLUSTRATION : Hook. loc. cit. 
The present species, which is clearly a member of the trichomanoides group, 
was well described and figured by Hooker. The scales are minute (0.75 to 
1 mm. long), linear-deltoid from a rounded base, here 5 to § cells broad, the 
cells mostly oblong, thin-walled, translucent, pale rusty. The cilia are dis- 
tinctly reddish brown and mostly longer than the width of the scale. 
The following specimens, agreeing closely with Hooker’s plate, are in the 
U. 8S. National Herbarium: 
Costa Rica: Near La Palma, alt. 1,450 to 1,550 meters, on trunk of a small 
forest tree, Maron 392. Same locality, Tonduz 12648. 
7An accompanying note in Dr. Underwood’s hand reads as follows: “ Mr. 
Sherring says specimen photographed was afterwards divided in three parts: 
One here [Jenman herbarium], one at Kew, and the balance with himself.— 
L. M. U., 1903.” 
* Bull. Bot. Dept. Jamaica II. 4: 113. 1897. 
