Par? 2, 1913] DICRANACEAE 145 
appressed dichotomous branches of two colors, indistinctly angulate, with acute, slender, 
somewhat incurved apices: stem-leaves very straight and densely appressed, narrowly canalicu- 
late, lanceolate-subulate, the apex slightly truncate and serrulate with rather distinct teeth; 
costa very broad, occupying the entire convolute subula above; alar cells above the fibrillose 
decurrent base, as well as the marginal cells, thin, lax and pellucid. (Translated from the 
original description.) 
TYPE Locavity: On the Irasu volcano, Costa Rica, at 3300 meters. 
DISTRIBUTION: Known only from the type locality. 
‘There is little in the above description to separate this species from C. introflexus; a small 
specimen in the collection of the New York Botanical Garden, named by C. Miiller and evidently 
a cotype, has perichaetial leaves with long, dentate, hyaline points; leaf-cells and cross-section of 
the costa of the lower part of the leaf about as in C. introflexus also, but the alar cells apparently 
always ill-defined and the back of the costa ribbed only above, not with serrulate lamellue, The 
specimen evidently is in poor condition but may possibly represent a distinct species. 
25. Campylopus humilis Mont. Ann. Sci. Nat. III. 4: 110. 1845. 
Plants in soft cushions, with very slender stems up to 2 cm. high: leaves comose at tegular 
intervals along the stem, lanceolate-subulate and somewhat falcate-secund or spreading-flexu- 
ous, up to 6.5 mm. long, the margins more or less serrulate about one third down the leaf; costa 
excurrent, in cross-section a little below the middle showing stereid-bands above and below the 
guide-cells with outer cells rather distinctly differentiated on the dorsal side only; leaf-cells 
with walls not pitted nor greatly thickened, mostly rectangular, the lower cells toward the 
costa up to 404 long by 124 wide, toward the margin narrower, the alar group enlarged, 
auriculate, mostly reddish: seta about 12 mm. long, mostly slightly curved or sinuous: capsule 
nodding, curved, furrowed when dry, scarcely strumose, about 1.3 mm. long without lid; lid 
conic, obliquely rostrate, a little more than 1 mm. long; annulus large; peristome-teeth 
reddish, 50-60 » wide at the base, divided rather more than one half down into 2 filiform, 
papillose forks, the outer plates vertically striate, the inner articulations crowded, 5—8 w apart: 
calyptra slightly rough at the apex, the base not fimbriate: spores not quite smooth, up to 12 » 
in diameter. 
TyPx Locality: Brazil. 
DistTRIBuTION: Near Newhaven Gap, Jamaica; also in Brazil. 
The Jamaica specimens agree very well with Montagne’s specimens and description except in 
regard to the calyptra which he describes as white-fimbriate at the base. This however may be 
a mistake, as Montagne remarks that he was unable to find any lids to the capsules. 
26. Campylopus filifolius (Hornsch.) Mitt. Jour. Linn. 
Soc. 12: 76. 1869. 
Dicranum filifolium Hornsch. in Mart. Fl. Bras. 12:12. 1840. 
Plants in soft green tufts; stems gender, up to 5 cm. high, radiculose below, interruptedly 
foliate: stem-leaves below the comal ones 4—-7 mm. long, appressed, involute, somewhat curved, 
from an ovate-lanceolate base rather gradually narrowed to a rough, grooved subula, with a 
narrow blade extending nearly to the apex and mostly serrulate one half down; costa serrulate 
and ribbed on the back to below the middle, in cross-section showing a row of large median 
cells, a narrow stereid-band on the ventral side, and a much broader band on the dorsal side 
enclosing one row of medium-sized cells in the lower part of the leaf and two rows in the upper 
part; alar cells red to hyaline and more or less auriculate, the cells just above short-oblong soon 
becoming rectangular, toward the margin often pale and narrow, toward the costa broader, with 
sometimes thickened and slightly pitted walls, the cells of the upper part of the leaf mostly 
square or oblong to rhomboidal; comal leaves similar to those below but larger, about 10 mm. 
long, and more or less squarrose or secund with a flexuous apex; inner perichaetial leaves 
smaller than the comal, with a broad, involute base extending about one half up and somewhat 
abruptly narrowed to a rough subula: seta flexuous, cygneous when moist, smooth, 10-15 
mun. long: capsule oblong, curved, smooth at the base and strumose, furrowed when dry, with 
an obliquely rostrate lid; peristome-teeth red, 50 w wide at the base: calyptra ciliate: spores 
rough, about 12 » in diameter. 
Type LocaLiry: Nova Friburgo, Brazil. . . 
DistRIBUTION: Costa Rica; Guatemala; also in Brazil. 
