MAXON—STUDIES OF TROPICAL AMERICAN FERNS. 139 
10 to 14 mm. broad; pinne 20 to 25 pairs, sessile, approximate or sometimes nearly 
their width apart, opposite or subopposite, characteristic middle ones oblong, 5 to 
6.5 mm. long, 3.5 to 4 mm. broad, at the base broadly cuneate, the margins elsewhere 
regularly and broadly crenate, the apex obtusely rounded; lower pinne shorter, 
2.5 to 3.5 mm. long, 3.5 to 4 mm. broad, horizontal; sori oblong, averaging 3 pairs 
to each pinna, nearly medial upon the spreading simple veins; indusia membranous, 
whitish, glabrous, the margin somewhat sinuate or slightly erose; spores ovoid, more 
or less alate, densely muricate-cristate. 
_ Type in the U. S. National Herbarium, no. 427538, collected from chinks of a cliff 
in humid forest on the upper slopes of John Crow Peak in the Blue Mountains of 
Jamaica, altitude between 1,650 and 1,800 meters, April 18, 1903, by William R. 
Maxon (no. 1319), in company with Prof. L. M. Underwood, whose specimens are 
in the Underwood Fern Herbarium of the New York Botanical Garden. 
One of the rarest and most delicate of the Jamaican species, somewhat resembling 
A. trichomanes, with which it was confused by Jenman, but differing in several essen- 
tial characters, notably in its few and exceedingly delicate fronds, in its very slender 
and dark-colored vascular parts, and in its fewer sori and simple veins. It has been 
collected at the type locality also by Harris, whose speci- 
mens (nos. 7338, 7902 in part) are in the Underwood Fern 
Herbarium, and by Hart. 
3. Asplenium pringlei Davenp. Gard. & For. 4: 449. 1891. 
Type LocaLiry: Wet cliffs near Guadalajara, State of 
Jalisco, Mexico, December 5, 1888 (Pringle 1837). 
Disrripution: Known only from the States of Jalisco 
and Chihuahua, Mexico. 
ILLUSTRATION: Loc. cit. 4: f. 71. 
The present species, which seems to have been gathered 
only by Mr. Pringle, is by far the most strikingly peculiar 
oneof the group. In describing it Mr. Davenport compared 
it with the “incised form of Asplenium trichomanes,’’ mean- 
Ing particularly no doubt the species since described as 
A. vespertinum. But it has no close relationship with that Fic. 1.—Asplenium under- 
Species, the deeply lobed pinnz and the unique sub- woodii. Part of type speci- 
: eae P : ‘ men. Scale 2. 
marginal position of the sori setting it apart from that as 
from all other members of the group. The lobes of the pinnz are rounded, yet appear 
more or less acute and distant in the dried specimen, owing to the usual inflection 
of the margins. The sori are short, tumid, and very conspicuous, being placed 
wholly within the deep lobes and near to the margin. 
The following specimens have been examined: * 
Mexico: Wet clifis and mossy ledges near Guadalajara, State of Jalisco, Pringle, 
1837 (N, Y); Pringle 2769 (M, P); Pringle 4089 (herb. B. D. Gilbert). Sierra 
Madre, Chihuahua, October 21, 1887, Pringle, without number (P). 
4. Asplenium fibrillosum Pringle & Davenp. Bot. Gaz. 21: 257. 1896. 
Type LocALity: Mossy banks, canyons above Cuernavaca, State of Morelos, Mex- 
ico, altitude 1,650 meters, November 21, 1895 (Pringle 6191). 
DistrIBuTION: Known only from the States of Mexico and Morelos, Mexico. 
1'The herbaria from which specimens are cited are indicated by the following 
letters: E, D. C. Eaton Herbarium, Yale University; G, Gray Herbarium; M, Herba- 
rium of the Missouri Botanical Garden; N, Herbarium of the U. 8. National Museum 
(U. S. National Herbarium); P, Pringle Herbarium, University of Vermont; Y, 
Underwood Fern Herbarium, New York Botanical Garden. 
