140 NORTH AMERICAN FLORA LVoLumE 15 
10. Campylopus subleucogaster (C. Miill.) Jaeger & Sauerb. Ber. 
St. Gall. Nat. Ges. 1877-78: 381. 1879. 
Dicranum subleucogaster C. Miillin.c. Mohn Bull. Torrey Club 5:49. 1874. 
Dicranum sygodonticarpum C. Miill. Linnaea 42: 471, 1878. 
Plants in loosely cohering tufts, with stems 12.5 cm. high, branching above and tomentose 
below: stem-leaves about 5 mm. long, often somewhat curved and spreading-secund, from a 
short-ovate base gradually narrowed to a long, subulate, sharply denticulate point, the leaf- 
blade very narrow above and more or less serrulate one half down; costa shortly excurrent, 
rough on the back above, about 200 » wide near the base and extending about one third across 
the leaf-base, in cross-section showing a ventral row of rather irregular cells with somewhat 
thin walls extending scarcely one third through the costa, a median row of cells of nearly the 
same size with a stereid-band on the dorsal side; alar cells reddish to hyaline, broad, lax, rather 
poorly defined from the cells above, which are more or less inflated, often up to 25 » wide and 
scarcely elongate toward the costa, somewhat smaller and narrower toward the margin, all 
becoming gradually smaller upward with somewhat thickened not pitted walls, the majority 
of the cells in the broader part of the leaf varying from nearly square to twice as long as broad; 
inner perichaetial leaves convolute nearly one half up, gradually narrowed to a rough subula: 
seta sinuous above, smooth, 10-12 mm. long: capsule elliptic, regular, smooth at the base, deeply 
furrowed and nearly cylindric when dry and empty, 1.2 mm. long, with a lid two thirds as 
long; annulus large; peristome-teeth split to the middle, at the base 40» wide: calyptra 
ciliate: spores rough, 12-14 w in diameter. 
TYPE Locality: Alabama. 
DistRisution: Alabama; Costa Rica; Guatemala. 
11. Campylopus retinervis (C. Miill.) Paris, Index Bryol. 
Suppl. 95. 1900. 
Dicranum retinerve C. Mill. Bull. Herb. Boiss. 5: 552. 1897. 
Plants in low, glossy-green, lax tufts; stems small, mostly simple, slender, few-leaved: 
stem-leaves more or less straight, erect, when moist spreading, 2-4 mm. long, from a narrow 
base, narrowly cymbiform-lanceolate, extending into a subulate grooved acumen, denticulate 
at the apex; costa broad, about 150 w wide near the base, laxly reticulate, striate, excurrent, 
in cross-section below showing ventral cells extending one half through with median cells 
about one half as large and a stereid-band below; cells of the leaf-blade dense, minutely 
quadratic, at the base more lax and larger with alar cells flat, or concave, hyaline, often not 
distinctly defined; perichaetial leaves longer-subulate: seta flexuous, short, smooth: capsule 
small, oval; erect; lid shortly conic: calyptra very small, split one half up, ciliate at the base: 
peristome short, narrow. 
TyPE LOCALITY: Cinchona, Jamaica. . 
DISTRIBUTION: Known only from the type locality. 
12. Campylopus Sargii Roll; Ren. & Card. Bull. Soc. Bot. 
Belg. 38'!: 8. 1900. 
Plants cespitose, yellowish or rusty-green; stems erect or ascending, about 1 cm. high, 
below somewhat reddish-tomentose: stem-leaves 3-4 mm. long, erect-flexuous or subsectund, 
from an oblong base extending into a long subula acutely dentate and often reddish above; 
costa 100-140 » wide near the base, occupying about one fourth the width of the leaf-base, in 
cross-section showing 3 or 4 layers of cells, the ventral thin-walled and hyaline, the others 
thick-walled and indistinct; leaf-cells near the base lJaxly rectangular, upward gradually 
smaller, oblong; alar cells hyaline to rusty-brown, subhexagonal, more or less distinct; peri- 
chaetial leaves somewhat similar to the stem-leaves but the inner longer with a narrower 
costa, only about 40 » wide: seta flexuous, geniculate when wet, 5~7 mm. long: capsule sym- 
metric, oblong, when dry subcylindric, deeply sulcate; lid obliquely long-rostrate; peristome- 
teeth rusty-brown, about 48 » wide at the base, divided into two unequal, papillose, filiform 
forks: calyptra ciliate at the base: spores rough, about 12 » in diameter. 
TyPH LOCALITY: Juan Vifias, Costa Rica, at 1130 meters. 
DISTRIBUTION: Known only from the type locality. 
