166 NORTH AMERICAN FLORA [VoLumE 15 
long, from a rather narrow base gradually narrowed to a more or less subtubulose point mostly 
a little exceeding the basal part in length; costa in cross-section Showing single layers of cells 
above and below the chlorocysts in the middle, with 2 or 3 layers of cells above and 3 below in the 
thicker parts; hyaline blade in the lower part of the leaf of 8-10 rows of cells; inner perichaetial 
leaves somewhat convolute nearly to the apex, rather shorter than the outer: seta about 1 cm. 
long: capsule not strumose, 1.25 mm. long, with a rostrate lid of about equal length. 
TYPE LOCALITY: Costa Rica. 
DISTRIBUTION: Jamaica; Mexico; Guatemala; Costa Rica. 
a 
A 
8. Leucobryum Martianum (Hornsch.) Hampe; C. Miill. 
Linnaea 17: 317. 1843. 
Dicranum Martianum Hornsch. in Mart. Fl. Bras. 12: 11. 1840. 
Pseudautoicous: male plants 2-3 mm. high, in clusters on dense tufts of tomentum 
enclosed by archegonial leaves of sterile flowers; antheridia 2 or 3, about 0.3 mm. long, with 
few paraphyses, enclosed by several perigonial leaves with an ovate, concave base tapering to 
a lanceolate point scarcely equaling the base in length: fertile plants in rather low, loose mats, 
with’ stout, spreading, short stems or somewhat taller and more compactly growing; stems 
mostly 1-3 cm. high, with crowded leaves usually more regularly falcate-secund than in the 
other species: stem-leaves 5-6 mm. long, very gradually narrowed from an ovate-lanceolate 
base to a slender subtubulose point denticulate at the apex; costa in cross-section showing but 
a single row of cells above and below the chlorocysts throughout the lower part of the leaf with 
chlorocysts in the upper part of the leaf much nearer the dorsal than ventral surface; hyaline 
blade narrow, 5 or 6 cells wide below; perichaetial leaves 2.5-3 mm. long, with a broad, con- 
volute base abruptly narrow to a point of about equal length: seta red, flexuous, 1.5-2 cm. 
long: capsule curved, nodding, strumose, about 1.5 mm. long, deeply furrowed when dry; lid 
conic-rostrate, about the length of the capsule; peristome-teeth reddish-brown, densely 
vertically striate below, divided about one half down, the forks filiform and papillose above: 
spores somewhat rough, up to 16 » in diameter. 
TYPE LOCALITY: Brazil. tee : ; 
DISTRIBUTION: Porto Rico, Guadeloupe, Martinique, St. Vincent, and Grenada; also in northern 
South America. : 
