310 Alexander W. Evans, 



a considerable part of the antical margin as well. Many of these 

 teeth are distinctly spinose in character. The leaf-cells have 

 distinct triangular trigones with bulging sides. Toward the base 

 occasional oval intermediate thickenings make their appearance, and, 

 especially in the antical portion, there is a tendency toward a 

 coalescence of the thickenings. 



The specimens just described agree in most respects with those 

 distributed by Spruce under the name P. oreocharis, although the 

 latter are a little less robust. The trigones in Spruce's plants, 

 however, are a little larger, and the thickenings show a stronger 

 tendency to coalescence throughout the leaf. Stephani comments 

 on the great variability in the number of teeth found on vegetative 

 leaves, but emphasizes the fact that the perichaetial bracts and 

 the perianths present characters of more constancy. 



11. Plagiochila pauciramea sp. no\\ 



On damp earth and wood, Lucma, 7,000 feet, August 7, 1911. 



Yellowish to brownish green, not glossy, growing in loose tufts : stems 

 mostly 5 — 6 cm. long and 0.45 mm. in diameter, flexuose, ascending, sparingly 

 and irregularly branched, the branches all terminal, of the Frullania type, 

 sometimes irregularly subdivided, obliquely spreading, similar to the stem 

 but often shorter and with smaller leaves : leaves alternate, loosely imbri- 

 cated, obliquely spreading (at an angle of about 60 degrees), antical portion 

 more or less convex near the base, otherwise plane or nearly so, ovate, about 

 3 mm. long and 2.3 mm. wide, long-decurrent antically, more shortly- and 

 narrowly decurrent postically, antical margin a little revolute near the base, 

 slightly outwardly curved or nearly straight, entire at the base but bearing 

 from two to four spinose teeth beyond the middle, postical margin narrowly 

 revolute in the decurrent portion and slightly beyond, more strongly out- 

 wardly curved, entire at the base but bearing about ten spinose teeth scattered 

 throughout the greater part of its length, apex broad and rounded with about 

 five spinose teeth ; total number of teeth mostly fifteen to twenty, slender 

 and acuminate, mostly four to ten cells long and one to four cells wide at the 

 base, the larger teeth irregularly distributed but tending to be more numerous 

 in the outer part of the leaf ; leaf-cells plane, averaging about 25 ^ at the 

 apex, 45 X 30 fj. in the middle, and 55 X 30 ^u at the base, walls appearing 

 uniformly thickened on account of the fact that the thick outer walls extend 

 down upon the vertical walls, the latter upon careful focusing appearing thin 

 but showing small trigones with straight or sUghtly bulging sides and very 

 rare oval intermediate thickenings ; cuticle smooth : underleaves about 

 0.15 mm. long and 0.12 mm. wide, divided almost to the base into four to 

 eight slender cilia: remaining parts not seen. (Fig. 5.) 



