160 NORTH AMERICAN FLORA [VoLumE 15 
sometimes 2 layers on the dorsal side in the thickest part and a single layer of hyaline cells 
toward the margin; leucocysts mostly short-rectangular, with thin straight walls, or the walls 
finally becoming sinuous, the inner more or less porose; median cells about 10 wide by 
12-16 uw long.. 
Type LocaLity: Guadeloupe. 
DistR1BuTION: Known only from the type locality. 
2. Leucophanes Mittenii Card.; Paris, Index Bryol. 
ed. 2. 3: 192. 1905. 
Octoblepharum pau Mitt. Jour. Linn. Soe. 12: 110. 1869. Not Leucophanes angustifolium 
Ren. & Card. 
Flowers and fruit unknown. Plants growing in low, pale-green cushions: leaves 4—4.5 
mm. long, erect-spreading, narrowly elliptic in the lower part, gradually narrowed above to a 
nearly linear, keeled point with an obtuse, minutely serrulate apex often gemmiferous; gemmae 
fusiform, up to 100 long, with 8-10 cross-walls; leaves in cross-section near the middle 
showing a single layer of leucocysts on either side of the nearly median chlorocysts, a median 
costa-like stereid-band and the leaf border also of a stereid-band; costa-like band percurrent 
or nearly so, 16-20 uw wide two thirds down the leaf, only slightly tapering and smooth on the 
back; leaf-border extending from the apex to near the base, mostly recurved in the lower 
half; lower part of the leaf on either side towards the margin of a single layer of leucocysts; 
median cells of the leaf short-rectangular to elongate-hexagonal, about 12 » wide by 20-40 
long, in the lower part of the leaf larger, mostly short rectangular. 
Type LocaLity: Ecuador. 
Distrigution: Guadeloupe; also in Trinidad and Ecuador. 
2. OCTOBLEPHARUM Hedw. Descr. 3: 15. 1791. 
Autoicous. Male flowers inconspicuous, often several, nearly sessile, scattered along the 
stem below the perichaetium. Plants mostly pale-greenish or brownish-white, sometimes 
reddish- or purplish-tinged, of medium size, growing usually in compact tufts with branching 
stems 1-3cm. high. Leaves close together, fragile, (in some species the tips mostly broken off) 
erect-spreading to widely spreading or squarrose, often consisting chiefly of the large, thick, 
ligulate costa which tapers below to a narrow base, the small, hyaline lamina of the leaf some- 
times scarcely evident, of one or partly of a double thickness of cells; costa in cross-section near 
the middle showing a row of small, triangular chlorocysts, sometimes becoming four-sided below 
with usually 3 or 4 rows of leucocysts above, and 2 or 3 rows below the chlorocysts, the hyaline 
cells all more or less porose; perichaetial leaves scarcely differentiated. Seta erect, more or 
less elongate. Capsule erect, regular, oval to cylindric, with stomata, often rather obscure, 
in 1 or 2 rows near the base; peristome pale- or golden-brown, of 8 lanceolate, not quite smooth 
teeth with a median line, or of 16 teeth in pairs without a median line; lid with a subulate, 
oblique beak. Calyptra cucullate, entire at the base. 
Type species, Bryum albidum L. 
Leaves less than 10 mm. long, usually less than 7 mm. long, i in cross- -section one 
half down showing thick, abruptly rounded margins. 
Peristome-teeth 8. 
Leaf mostly abruptly rounded to the apiculate and serrulate apex; setafup 
to 7 mm. long; capsule ovate to oblong, 1-1.5 mm. long. 1. O. albidum, 
Leaf mostly rather gradually acutely pointed, scarcely apiculate or serru- 
late; seta 10-20 mm. long; capsule oblong-cylindric, 1.5—2 mm. jong. 2. O. cylindricum, 
Peristome-teeth 16; leaf-apex mostly entire or slightly undulate, broad and 
rounded to a stout apiculus. 3. O. pulvinatum. 
Leaves up to 20 mm. or more long, very fragile, in cross-section one half down 
showing margins with mostly acute, not rounded edges. 4. O. erectifolium. 
1. Octoblepharum albidum Ue ) Hedw. Deser. 3: 15. 1791. 
Bryum albidum 1. Sp. Pl. ed. 2. $388. 7. = 
Octoblepharum pallidum Besch,; Card Mém. Soc. Sci. Nat. Cherbourg 32: 41; nomen nudum. 1900. 
Pats dala martinicense Mitt.; Card, Mém. Soc. Sci. Nat. »Cherbourg 32: 41; nomen nudum. 
, 190 
