CATALOGUE. 321 
Genera Filicum, p. 129. Hooker, Sp. Fil. ii, p. 150. Allosorus pulchellus, 
Martens & Galeotti, Fil. Mex. p. 47, t. 10, f. 1. 
Western Texas and New Mexico, C. Wright, Nos. 824 and 2132. Mexico to Peru. The New Mexi- 
can plant has been separated from the more southern form by Mettenius and Kuhn under the name of 
P. microphylla, as having shorter, ae flatter, and more cordate segments, but except for its smaller 
size and more delicate habit, I see no difference between it and specimens from the State of Chiapas in 
Southern Mexico. The almost or waiti black stalks and rachises and the minute cordate-ovate pinnules 
abundantly distinguish this species from P. andromedafolius. 
** Pinnules mucronulate or decidedly acute. 
Pellzxa ternifolia, Link. 
Rootstock short, thick, densely chaffy, the scales narrow and dark- 
brown, with a blackish midrib ; stalks crowded, nearly or quite black, with 
a purplish bloom when living, rigid, 2-6 inches long; frond as long or 
longer than the stalk, narrowly linear in outline; pinnze usually 9-15 pairs, 
all but a few of the uppermost trifoliolate; segments commonly linear- 
obovate, slightly mucronate, coriaceous, somewhat glaucous beneath, green 
above, sessile, or the middle one indistinctly petiolulate, when fertile with 
the edges much rolled in; involuere broad, the edge only membrana- 
ceous—F'il. Hort. Berol. p. 59. Hooker & Baker, Syn. Fil. p. 148. Pieris 
ternifolia, Cavanilles, Hooker & Greville, Ic. Fil. t. 126. 
From Mexico to Pern and in the Hawaiian Islands. I refer to this species with much hesitation 
a few little specimens gathered by Dr. Sutton Hayes among the headwaters of the Rio Colorado of 
Texas. They have only the simply trifoliolate pinnules of this species, but the segments are of the 
short-oval or roundish form more common in the next. Were P. ternifolia ever known to develop more 
than three segments to a pinna in countries where it is abundant, it would seem reasonable to consider 
the two following species only forms of it with more and more compound fronds, but in the present state 
of our knowledge of them it is perhaps best to keep them separate. 
Pellxa Wrightiana, Hooker. 
Rootstock short, thick, nodose, densely chaffy with very narrow 
dark-brown scales; stalks crowded, purplish-brown, polished, rigid, 4-6 
inches long; frond about as long as the stalk, from lanceolate to triangular- 
ovate in outline, bipinnate; pinne nearly sessile, spreading; pinnules cori- 
aceous, smooth, green above, slightly glaucous beneath, almost sessile, at 
most about six pairs; those of the sterile frond roundish-oval, 3-5 lines 
long, two-thirds as broad, rounded, or even subcordate at the base, the 
apex obtuse, but with a minute subulate semi-pellucid cartilaginous point 
or mucro; those of the fertile fronds rolled in to the midrib and therefore 
21 BOT 
