138° NORTH AMERICAN FLORA [VoLumy 15 
7 mm. long, nearly straight when moist, somewhat appressed or spreading and flexuous when 
dry, from an ovate-lanceolate base gradually narrowed to a long, grooved subula, slightly 
hyaline and denticulate at the apex, the very narrow leaf-blade above slightly serrulate on the 
border and extending well above the middle of the leaf ; costa up to 300 « wide just above the 
alar cells and nearly one half the width of the lower part of the leaf, in cross-section showing 
ventral cells extending almost one half through the leaf, with a median row of smaller cells 
and a stereid-band on the dorsal side; alar cells large, inflated, auriculate, red to hyaline; cells 
just above at the margin pale, very narrow, those within broad, short, thick-walled, mostly 
from nearly square to twice as long as broad, sometimes colored and pitted; inner perichaetial 
leaves a little longer than the stem-leaves, convolute about one third up and rather abruptly 
narrowed to a long, denticulate subula: seta flexuous, smooth, 8-12 mm. high: capsule oval, 
curved, furrowed and slightly strumose when dry; exothecal cells rectangular; lid conic- 
subulate; peristome-teeth reddish-brown, about 60 » wide at the base, undivided to well above 
the middle: calyptra copiously ciliate at the base: spores rough, up to 14 « in diameter. 
Typrs LocaLity: Santo Domingo. 
DIstRIBUTION: Santo Domingo and Jamaica. 
ILLUSTRATION: Hedw. Sp. Musc. pl. 37. 
6. Campylopus Cacuminis (C. Miill.) Paris, Index Bryol. 
Suppl. 90. 1900. 
Dicranum Cacuminis C. Mill. Hedwigia 37: 227. 1898. 
Dioicous: plants in broad, light-green, shining cushions, at the base somewhat reddish- 
tomentose; stems scarcely 2.5 cm. high, slenderly caudate-attenuate, curved or falcate above, 
capituliform-divided with very short, uniform, appressed branches: stem-leaves rather densely 
imbricate, small, narrow, subuliform, from a broader base with few, rather large, lax, purplish 
alar cells, forming a’somewhat congested, concave auricle, extending into a more or less lanceo- 
late-acuminate or acute, straight, very entire blade, with the margin a little involute and with 
thick-walled elliptic cells, at the base rectangular and broader, the broad nerve, laxly reticulate,. 
filling the entire leaf above; perichaetial leaves much longer-subulate, sometimes denticulate 
at the apex: seta short, yellowish, very- flexuous, smooth: capsule small, oblong, nodding, 
sulcate, ribbed, with a slightly strumose collum and an obliquely rostrate conic lid: calyptra 
small, at the base shortly fimbriate: spores very minute, brownish-yellow. (Translated from 
the original description.) 
TYPE LOCALITY: Blue Mountain Peak, Jamaica. — 
DistRIBUTION: Known only from the type locality. 
No authentic specimens of this species have been seen. ‘The plants referred here were collected 
by Dr. Rothrock in the Blue Mountains, Dec. 13, 1890. They have leaves up to 8 mm. long, slightly 
serrulate at the apex, the very narrow blade extending almost to the apex; the costa, up to 325 
wide near the base, shows in cross-section a row of large thin-walled cells on the ventral side extending 
nearly one half through the léaf with differentiated cells on either side of the stereid-band on the 
dorsal side of the leaf; cell-watls of the blade thin and lax below, somewhat thickened above; seta 
10 mm. long; capsule 1.5 mm. long; spores somewhat rough, up to l5y in diameter. 
7. Campylopus flexuosus (I,.) Brid. Musc. Recent. 
Suppl. 4: 71. 1819. 
Bryum flexuosum I,. Sp. Pl. 1118. 1753. 
Plants in compact, green or yellowish-green tufts, tomentose within; stems up to 5 cm- 
high, often bearing flagellate, clustered branches: leaves about 4.5 or sometimes up to 6 mm- 
long, rather uniformly placed along the stems, mostly erect when dry or curved-secund at the 
apex of the stem, from an oblong-lanceolate base gradually narrowed to a point nearly smooth 
except at the sharply denticulate apex; costa percurrent or slightly excurrent, about 275 » wide 
at the base and one half the width of the lower part of the leaf, ribbed and slightly serrulate 
on the back above, in cross-section below showing a row of large ventral cells, a median row 
nearly as large and a stereid-band on the dorsal side with one row of differentiated cells; alar cells. 
reddish, more or less inflated and auriculate; cells of the blade just above rectangular, broad, 
often reddish toward the costa, narrow and pale toward the margin, but not forming a distinct 
border, with walls thin, not pitted, soon becoming smaller above, from nearly square to rhom- 
boidal, the median cells 4-6 » wide and 8-10 u long; perichaetial leaves longer than the stem- 
