( 126) 
in upper about 0.5 mm. long and border mostly revolute on 
one side; cross-sections of upper leaf show 2 large cells on 
ventral side of costa and 2 rows of smaller cells on dorsal side, 
without stereid band, and the leaf-lamina of a single layer of 
cells with border not thickened or sometimes of a double row 
of small cells; leaf-cells with thickened, sinuous walls nearly 
to apex, upper cells all short, mostly roundish to transversely 
elongated, in middle leaf up to twice longer than broad, and 
toward base up to 45 4 long within, but with 3 or 4 rows at 
margin of shorter, broader cells: seta twisting and curving, 
3-4 mm. long; capsule oblong, 1.6 mm. long, smooth, 
with red, conical-rostrate lid about one half as long; exo- 
thecal cells thin-walled, more or less hexagonal, often some- 
what elongated, with stomata below; annulus broad, 3 or 4 
rows of cells high; peristome-teeth narrowly lanceolate, not 
regularly split above, but more or less cribrose and slightly 
split here and there, somewhat papillose and with distinct ar- 
ticulations ; calyptra lobate-mitrate, scarcely more than cover- 
ing lid: spores up to 12 # in diameter. 
Pelichuco, 3450 meters, May 4, 1902 (2823). 
GRIMMIA TRICHOPHYLLOIDEA Schimp. 
Luipichi Pass, 4500 meters, September 27, 1902 (17477). 
RHACOMITRIUM CRISPIPILUM (Tayl.) Jaeg. 
Ingenio, 2700 meters, September 26, 1902 (1773). 
RHACOMITRIUM BRACHYPUS (C. Mill.) Par. 
Pelichuco, 3450 meters, May 4, 1902 (2822). 
RHACOMITRIUM DIMORPHUM (C. Mill.) Par. 
Ingenio, 3000 meters, September 10, 1901 (1775); near 
Tacacoma, 3600 meters, June 9, 1902 (1784). 
Rhacomitrium sublanuginosum Schimp. MSS. 
Stems blackish, with abundant short branches: leaves 
ovate-lanceolate to lanceolate, the upper about 2.5 mm. long 
and 0.4-0.5 mm. wide, mostly revolute on one side, with a 
more or less sinuous, flat hair-point up to as long as blade 
and entire or minutely serrulate, the hyaline margin not ex- 
tending downward on either side of the colored costa; lower 
leaves much shorter, without hyaline point, the apex blunt; 
leaf-cells narrow and elongated to apex, in margin at base 
becoming broader and shorter, often nearly square to twice 
longer than wide: immature capsule 2 mm. long, with ros- 
trate lid two thirds as long; seta 4.5 mm. long. 
