﻿654 Slosson: Notes on Trichomanes 



tito, 3 ad 4 cm, longo filiformi sed rigido, laminae rachi lo cm. 

 longa flexuosa, lamina lanceolata pinnis adscendentibus lineari- 

 lanceolatis ad 4 cm. longis iterum pinnatis laciniis linearibus % mm. 

 latis apice furcatis acutis nervo inconspicuo, urceolis ad basin 

 laciniarum, brevissime pedunculatis patulis sive recurvis ij^ mm. 

 longis anguste conicis vix i mm. latis, limbo statu maturo hori- 

 zontaliter patente receptaculo exserto. 



"Plante singulierement 6troite dans toutes ses parties, d'un 

 tissu dur, bien different du tissu diaphane de T. pyxidiferum. 



"Hab. Costa-Rica inter muscos epiphyticum. I. Werckle. 



"Obs. Cette forme semble etre assez repandue dans TAmerique 

 centrale. Je I'ai tres bien caract^risee du Mexique. I. Pringle 

 3800 avec la designation erronee: T. radicans Sw. Je I'ai du S. du 

 Bresil. I. Schwacke." 



As in many species of Trichomanes, the leaf-segments in this 

 plant vary in width, sometimes becoming very contracted, giving 

 the plant a still stiffer look. A curious line parallel with the mar- 

 gins, resembling a false vein broken at intervals, is to be seen in 

 the dried leaves by transmitted light,* but disappears on soaking 

 them in water.f It seems to be formed by some contraction of 

 the leaf-tissue. A note evidently referring to this, on the labels 

 of some of H. H. Smith's plants, reads "the streaks parallel with 

 the veins are a constant character," so it may be they appear also 

 in living plants. 



Additional specimens of Trichomanes pyxidiferum are in the 

 Underwood Herbarium, as follows: — 



Cuba: "Cuba Orientale," Wright 180/, go6 in part, 907 in part. 



Jamaica: "Old England," below Cinchona, 1070 m. alt., 

 Underwood 1666. 



Mexico: moist virgin forest, 1524 m. alt., W. A. Murrill & 

 Edna L. Murrill 35; without locality, Fred Muller 400, Sartorius. 



Peru: near Tarapoto, R. Spruce 4761; without locality, Mat- 



Colombia: rather rare on trees, damp forest. Sierra del Libano, 

 1524-1828 m. alt., H. H. Smith 2255; on trees and rocks, damp 



