CATALOGUE. 321 



Genera Filicum, p. 129. Hooker, Sp. Fil. ii, p. 150. Allosorus pulchellus, 

 Martens & G-aleotti, Fil. Mex. p. 47, t, 10, £ 1. 



Western Texas aud New Mexico, C. Wright, Nos. 824 and 2132. Mexico to Peru. The New Mexi- 

 can plant lias been separated from the more southern form by Mettenius and Euhn under the name of 

 P. microphylla, as having shorter, broader, 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 quite black stalks and rachises and the minute cordate-ovate pinnules 

 abundantly distinguish this species from P. andromedcefolius. 



**Pinnules wmcronulate or decidedly acute. 



Pellsea 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 ; pinnse 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 ; involucre broad, the edge only membrana- 

 ceous — Fil. Hort. Berol. p. 59. Hooker & Baker, Syn. Fil. p. 148. Pteris 

 ternifolia, Cavanilles, Hooker &Greville, Ic. Fil. t. 126. 



From Mexico to Peru 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 Eio 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 iu the present state 

 of our knowledge of them it is perhaps best to keep them separate. 



Pellsea 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 ; pinnae 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 



