148 NORTH AMERICAN FLORA [ VoLUME 15 
32. Campylopus bermudianus R. S. Williams; Britton, Jour. N. Y. 
Bot. Gard. 13: 193. 1913. 
Plants in rather dull-green, not very compact tufts, tomentose within; stems about 4 cm. 
high, branching, often with flagella, more or less interruptedly foliate: leaves often comose at 
the apex, mostly laxly spreading-flexuous all around, the upper about 6 mm. long, lanceolate, 
grooved above, not subtubulose, sharply serrate at the apex and more or less serrulate on the 
margin one half down or more; costa percurrent or slightly excurrent, about 225 » wide below 
and one third the width of the lower part of the leaf, with prominent serrate lamellae 2 or 3 
cells high on the back above, in cross-section near the middle showing a median row of 7 or 8 
large cells with stereid-bands above and below, the lower band with a row of differentiated 
outer cells; alar cells reddish, inflated, the cells just above mostly rectangular, pale, broad 
toward the costa, narrow toward the margin, with scarcely thickened or pitted walls, in the 
leaf above soon becoming smaller, with slightly thickened walls rarely pitted near the costa ; 
median and upper cells of the blade mostly 6-8 » wide and 8-20 u« long, with uniformly slightly 
thickened walls: flowers and fruit unknown. 
TYPE LOCALITY: Paget Marsh, Bermuda. 
DistRiBuTION: Known only from the type locality. 
33. Campylopus guadelupensis (Brid.) Mitt. Jour. Linn. 
Soc. 12: 77. 1869. 
Dicranum guadalupense Brid. Musc. Recent. Suppl. 1: 213. 1806. 
Plants cespitose but laxly cohering, very simple, strict, rigid, rather low, sparsely tomen- 
tose, below filiform, above spreading-comose: stem-leaves erect-appressed, strict, short, exactly 
lanceolate, on the back scarcely lamellose, concave, broatily nerved, at the very apex denticu- 
late; alar cells subventricose, very conspicuous, delicate, brownish, the lower leaf-cells sub- 
quadrate, the upper ones very minute: male flower compound; outer perigonial leaves broadly 
convolute, acuminate, very entire, slightly nerved, the inner rather obtuse, not acuminate, 
scarcely nerved, all colored. (Description according to C. Miiller.) 
TYPE LocaLity: Guadeloupe. 
Distrisution: Guadeloupe. 
A single stem of the type from the Bridel herbarium has been examined. It is 2.5 cm. high, 
appearing comose at the apex, with straight, appressed leaves below; leaves 3-4 mm. long, entire 
except at the apex which usually bears 5 or 6 clustered, somewhat spreading teeth; costa one half to 
three fifths the width of the leaf-base, slightly ribbed on the back to below the middle, in cross-section 
showing a median row of large cells with stereid-bands above and below, the dorsal band only with 
differentiated cells on the outer side; alar cells red to hyaline, the-cells of the lower part of the blade 
often nearly hyaline, rectangular, thin-walled, gradually much narrower toward the margin, those 
in the obscure upper part of the blade narrowly rhomboidal, often indistinct. 
Specimens collected by Pére Duss, 187, seem to be correctly referred here although the stems are 
scarcely comose above and the leaves more spreading and curved; the cross-sections of the costa and 
leaf-cells are similar. 
14. THYSANOMITRIUM Schwaegr. Suppl. 2!: 61. 1823. 
Campylopus § Thysanomitrium Mitt. Jour. Linn. Soc. 12: 89. 1869, 
Pilopogon § Thysanomitrium Broth. in E. & P. Nat. Pfl. 19: 335. 1901. 
Dioicous. Plants in broad, deep mats, the younger parts mostly green, the older, dark 
chestnut-colored or blackish. Stems stout, often tomentose, somewhat branching. Leaves 
straight, erect-spreading or appressed, lanceolate, often hyaline and serrulate pointed; costa 
broad, somewhat ribbed on the back, in a cross-section of the lower part of the leaf showing 
stereid-bands above and below the guide-cells; alar cells forming a distinct, mostly brownish 
cluster. Flower-buds aggregate. Seta solitary, short, cygneous or strongly sinuous, often 
slightly rough above. Capsule elliptic, rough at the base, somewhat furrowed when dry, 
without stomata; annulus large; peristome-teeth very slender, solid or more or less divided 
along the distinct median line, densely papillose nearly to the base, often slightly striate at the 
base. Calyptra fimbriate on the lower margin. : 
Type species, Campylopus Richardi Brid. 
