Campylopus cygneus Bridel 1819

Campylopus cygneus (Hedw.) Brid. Bryol. Univ. 1 : 475. 1826
Dicran um cygneum Hedw. Sp. Muse. 148. 1801. 'Campylopus jamaicensis Mitt. Jour. Linn. Soc. 12: 82. 1869. JPilopogon jamaicensis Broth, in E. & P. Nat. Pfl. I 3 : 336. 1901.
Plants in rather loose tufts, with slender, more or less branching, sparsely radiculose stems uip to 4 cm. high; stems rather equally foliate or somewhat comose above: upper leaves about 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, slightlyhyaline 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 cellsand 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 abruptlynarrowed to a long, denticulate subula: seta flexuous, smooth, 8-12 mm. high: capsule oval,, curved, furrowed and slightly strumose when dry; exo thecal cells rectangular; lid conicsubulate; peristome-teeth reddish-brown, about 60 n wide at the base, undivided to well above the middle: calyptra copiously ciliate at the base: spores rough, up to 14 ^ in diameter.
Type locality: Santo Domingo.
Distribution: Santo Domingo and Jamaica.

Campylopus cygneus là một loài Rêu trong họ Dicranaceae. Loài này được (Hedw.) Brid. mô tả khoa học đầu tiên năm 1819.