134 NORTH AMERICAN FLORA [VoLumE 15 
1. Brothera Leana (Sull.) C. Miill. Gen. Muse. 259. 1901. 
Leucophanes? Leanum Sull. Musci Allegh. 172. 1845. 
Campylopus Leanus Sull. in A. Gray, Man. ed. 2. 619. 1856. 
Leucobryum Leanum Kindb. Eur. & N. Am. Bryin. 176. 1897. 
Brothera Ankerkronae C. Mill. Gen. Musc. 258. 190 
Dioicous: fertile plants densely tufted, rather light-green, glossy, with mostly un- 
branched, more or less radiculose stems scarcely 1 cm. high, uniformly foliate with erect- 
spreading, lanceolate-subulate leaves, 3~3.5 mm. long on the upper part of the stem, with a 
subtubulose point entire except at the very apex, and often bearing in the axils of the upper 
leaves numerous, nearly linear, pale, deciduous, rudimentary leaflets 0.5 to nearly 1 mm. long; 
costa filling most of the upper part of the leaf, one third or more the width of the leaf below, 
in cross-section near the middle showing large outer cells on the under side of the costa similar 
to the outer cells of the upper side with some smaller more or less disconnected median cells 
mostly in one row, not forming a distinct stereid-band; cells of the leaf-blade pale, thin-walled, 
rectangular, narrow at the margin, broader and often lax within, the alar group pale, fragile, 
often scarcely distinct from those of the blade; perichaetial leaves very similar to the upper 
stem-leaves: seta up to 7 mm. long, smooth, erect, somewhat sinuous and twisted: capsule 
oblong to elliptic, 1-1.3 mm. long, without stomata, smooth above, slightly rugose at the base, 
the exothecal cells narrow, elongate, with thick, somewhat flexuous walls; annulus large, of two 
rows of cells; peristome-teeth inserted below the mouth, divided to near the base into two 
subulate, indistinctly articulate, densely papillose forks; lid with a long, erect beak: calyptra 
large, cucullate, ciliate at the base: spores nearly smooth, 10-12 » in diameter. (Description 
of fruit mostly from a Japanese specimen.) 
‘Type LocaLity: Ohio. . 
DisTRIBUTION: Pennsylvania; Ohio; Minnesota; Mexico; also in Japan, the Amur region of 
Siberia, and the Himalaya region. . 
ILLUSTRATION: Sull. Ic. Musc. pl. 18. 
- ae Sull. Musci Allegh. 172; Sull. & Lesq. Musci Bor. Am. 74; ed. 2. 94; Holz. Musci Acroc. 
or, ioe 
13. CAMPYLOPUS Brid. Musc. Recent. Suppl. 4: 71. 1819. 
Dicranum § Campylopus C. Miill. Syn. 1: 383. 1848. 
Dioicous. Plants in more or less compact tufts with radiculose, branching stems bearing 
leaves rather uniformly placed or comose at intervals or at summit and, sometimes, flagellaceous 
branchlets in the axils of the leaves. Leaves straight or curved, often secund, mostly from an 
ovate or ovate-lanceolate base extending into a grooved or tubulose, subulate and usually 
dentate point; costa percurrent or excurrent, more or less ribbed or lamellose on the back, 
very broad below and usually filling most of the upper part of the leaf, sometimes excurrent 
into a hyaline hair-point; alar cells extending to the costa, from scarcely differentiated to 
inflated and from hyaline to red: leaf-cells at the margin of the lower part of the leaf sometimes 
pale and very narrow with thin walls, forming a rather distinct border, the cells within often 
with much thickened and pitted walls. Seta usually arcuate when ‘moist, sinuous-erect when 
dry. Capsule regular or curved, sometimes strumose, from smooth to deeply furrowed when 
‘dry, sometimes very rough at the base; annulus compound; peristome-teeth broad at the base, 
with a median line, divided about one half down and vertically striate on the outer face between 
the distinct articulations of the lower part; lid beaked. Calyptra cucullate and mostly 
ciliate at the base, sometimes entire. 
Type species, Bryum flexuosum I,. 
Costa without stereid-bands. 1. PSEUDOCAMPYLOPUS. 
Costa with stereid-bands. 
Stereid-band on the under side of the costa only. 2. EUCAMPYLOPUS. 
Stereid-bands on both sides of the costa. 3. PALINOCRASPIS. 
1. PsupocAMPYLOPUS 
Large cells in 1 row across the costa in cross-section; costa ribbed on the 
back, 
Leaves 2-3 mm. long; seta 5 mm. long. 1. C. Schimperi. 
Leaves 5-7 mm. long; seta 10-15 mm. long. 2. C. Chrismart. 
Large cells in 2 rows across the costa; costa not ribbed. 3. Cy delicatulus. 
