﻿400 Williams: Mosses from west coast of South America 



EXCALYPTA EMERSA CM.? 



Bolivia: Comanche, August, 18884. 



This plant is perhaps distinct from E. emersa, of which I have 

 seen no specimens. The Bolivian plant is autoicous with stems 

 rather stout, about 2 cm. high; stem-leaves oblong, about 4 mm. 

 ^ong by 2 mm. broad, the apex rounded, the margins somewhat 

 crenate and papillose; costa vanishing a little below the apex, 

 rough on the back with pale spines, simple toward the apex, 

 branching at the middle and lower part of the costa; capsule 

 cylindric, nearly smooth, emergent, without peristome; calyptra 

 entire at base, somewhat scabrous at apex. 

 Aligrimmia peruviana R. S. Williams, Bull. N. Y. Bot. Gard. 3: 



124. 1903. 



Peru: vicinity of Arequipa, August, 18823, the locality 

 from which the type specimens were described. 

 Grimmia micro-ovata cm. 



Bolivia: Comanche, August, 75552a; vicinity of Comanche, 

 August, 18882; vicinity of La Paz, August, i88yo. 

 Grimmia saxatilis Mitt. 



Peru: Juliaca, September, igogi. 

 Zygodon circinatus Mitt. 



Peru: near Mollendo, August, 19526. Type specimens col- 

 lected on the island of Chiloe, Chile, and apparently unknown 

 elsewhere, excepting from this Peruvian collection. 

 Physcomitrium Roseae sp. nov. 



Antheridia not found: plants in thin mats or somewhat gre- 

 garious, with stems about 2 mm. high, scarcely projecting above 

 the earth over which they grow with the rosette-like cluster of 

 leaves resting on the surface; stems with a few radicles at the 

 base and 5 to 7 leaves clustered at the apex; leaves mostly ovate, 

 acute, with flat, entire margins, about 2.5 mm. long by 1.5 mm. 

 wide, with sometimes i or 2 much smaller inner leaves; costa 

 percurrent, weak, in cross-section showing 5 or 6 cells of somewhat 

 variable size without thickened walls; cells of upper part of leaf 

 more or less hexagonal, 20-25 ^ in diameter, toward the base 

 square to rectangular, about 25 m wide and 30-50 /x long; seta 2 

 mm. long; capsule subglobose, about 1.5 mm. high, without 

 annul us and peristome, the cells about the rim elongate in 5 or 6 



