Part 2, 1913] DICRANACEAE 189 
leaves, rather gradually narrowed a little more than one half up to a slender denticulate point: 
seta 8-10 mm. long, reddish: capsule about 2 mm. long, oval, when dry and empty cylindric, 
furrowed, and slightly curved; exothecal cells narrow with much thickened walls; peristome- 
teeth reddish-brown, vertically striate, divided about one half down, the inner articulations 
only about 6-8 uz apart; lid red, obliquely beaked, about two thirds the length of the capsule; 
annulus broad, of 2 or 3 rows of cells: calyptra fimbriate at the base: spores finely papillose; 
about 12 » in diameter. 
TYPE LOCALITY: Europe. 
DisTRIsuTION: Vancouver Island; Mexico; also in Europe. 
ILLUSTRATION: B.S.G. Bryol. Eur. pl. 89. 
8. Campylopus gracilicaulis Mitt. Jour. Linn..Soc. 12: 83. 1869. 
Plants in rather loose tufts; stems slender, up to 3 cm. high; lower stem-leaves appressed, 
more or less covered with radicles, the upper ones and those of the short branches somewhat 
larger and forming compact comas, all more or less lanceolate from an oblong base, serrulate 
nearly one third down, with the costa excurrent, the leaf blade often extending nearly to the 
apex and half way up oneither side of the costa 6-10 cells wide; costa extending about one 
third across the leaf-base, nearly smooth on the back below, rough above with serrulate ribs, 
in cross-section showing a row of large cells across the ventral side, a median row of about the 
same size, and on the dorsal side a narrow row of more or less interrupted stereid-cells with the 
outer cells differentiated; alar cells distinct, reddish to hyaline or sometimes quite indistinct, 
the lower leaf-cells mostly oblong, pale, lax toward the costa, narrow and sometimes forming a 
distinct border at the margin, farther up becoming somewhat thick-walled, smaller, mostly 
rhomboidal; inner perichaetial leaves sheathing more than one half up, somewhat abruptly 
narrowed to a rough, scarcely or not hyaline subula: capsule (immature) oval, unequal, rough 
at the base, hidden among the comal leaves on a reflexed seta about 9 mm. long: calyptra 
fimbriate at the base. 
TYPE LOCALITY: Brazil. 
DISTRIBUTION: Florida, Cuba, and Jamaica; also in Brazil. 
The Florida specimens of this speciés are all sterile, and mature fruit has apparently never been 
collected. 
/ 9, Campylopus fragilis (Dicks.) B.S.G. Bryol. Eur. (41:) 
Campylopus 4. 1847. 
Bryum fragile Dicks. Pl. Crypt. Brit. 3: 5. 1793. 
Plants in compact, pale, glossy-green tufts, up to 4 cm. high; stems tomentose below, 
branching above, more or less whitish within from the pale bases of the leaves: leaves about 
5 mm. long, densely imbricate, rather uniformly placed and more or less erect-spreading on all 
sides, from an oblong base, narrowly lanceolate, somewhat serrulate in the upper third with the 
costa shortly excurrent; costa extending about one half across the leaf-base, somewhat ribbed 
on the back above, in cross-section below showing a row of large cells on the ventral side extend- 
ing about one half through and a stereid-band on the dorsal side with a row of more or less 
differentiated cells on either side of the band; alar cells wanting, the lower cells toward the costa 
thin-walled, lax, up to 20 » wide by 80 u long, narrower toward the margin, scarcely forming a 
distinct border, hyaline or very pale about one fourth up the leaf to the rather abruptly nar- 
rowed part of .the blade where the cells become short and more or less obliquely elongate or 
rhomboidal with somewhat thickened walls, the cells in the very narrow blade above mostly 
short, more or less rhomboidal; perichaetial leaves sheathing about one half up, gradually nar- 
rowed to a stibulate point: seta sinuous above when dry, 5-8 mm. long: capsule regular, 
elliptic, ribbed; lid about one half as long as the capsule: calyptra ciliate at the base: spores 
14-16 p» in diameter, finely papillose. 
ela LocaLity: Great Britain. ; : ; 
ISTRIBUTION: Florida and Jamaica (sterile specimens); also in Europe, Asia, and Africa... 
ILLusTRATION: B.S.G. Bryol. Eur. 41. 90. : : . : 
The Florida specimens are like the European, but the specimens from Jamaica differ slightly in 
having a rather broader leaf-blade just above the pale basal cells, composed of more numerous, 
obliquely elongate cells. 
