Part 2, 1913} DICRANACEAE 95 
what obliquely or variously striate near the middle in D. contermina) with articulations more 
or less distinct, sometimes projecting; lid with a beak one half the length of the capsule or longer. 
Calyptra smooth, entire at the base. 
Type species, Mnium cirrhatum \. 
Costa at least 40 » wide at the base. 
Leaf-border more or less recurved; annulus present. 1.D 
Leaf-border flat or somewhat incurved. 
Inner perichaetial leaves convolute4o the truncate or broadly rounded 
apex 2 
Inner perichactiatléaves narrowed to a distinct point. 
Points of the perichaetial leaves short, usually much less than one 
half the height of the convolute bases; peristome-teeth papillose 
. cirvhata 
2. D. crispula. 
above, variously striate or smooth on the outer plates below. 3. D. contermina. 
Points of the perichaetial leaves longer than the convolute bases; 
peristome-teeth papillose throughout. 4. D. Roellii. 
Costa less than 30% (mostly 16-25 4) wide at the base. 5. D. subcompacta. 
1. Dicranoweisia cirrhata (L.) Lindb. Oefv. Sy. Vet.-Akad. 
Forh. 21: 230. 1864. 
Mnium. cirrhatum L. Sp. Pl. 1111. 1753. ‘ 
Weisia civrhata Hedw. Sp. Musc. 69. 1801. 
Autoicous: male flower on the stem a little below the perichaetium or terminating a short 
branch, of 10-12 antheridia with more or less numerous paraphyses: plants in broad, mostly 
yellowish-green tufts, with stems 1-2 cm. high: stem-leaves spreading on all sides, crispate 
when dry, up to 2.5 or 3 mm. long, oblong-lanceolate, with entire borders often of a double 
layer of cells above, broadly recurved at least on one side below, gradually narrowed to the 
broadish, grooved, rather acute, entire point, nearly smooth on the back; costa plainly van- 
ishing in the apex, 40-50 » wide at the base and usually one sixth to one eighth the width of 
the lower part of the leaf; alar cells quadratic, often not forming a very distinct group; lower 
leaf-cells rectangular, mostly about 12 » wide and 4-6 times as long toward the costa, shorter 
toward the margin, the upper ones nearly square, about 8» by 8-104; perichaetial leaves 
much like the upper stem-leaves, the inner a little broader and shorter, loosely clasping or 
slightly spreading, gradually narrowed to the broadish, obtuse or acute apex: seta yellowish, 
6-10 mm. long: capsule erect, symmetric, about 2 mm. long, oval-cylindric, pale-brown, 
smooth or rugose when dry; annulus distinct, of 2 rows of cells; lid with a straight, subulate beak 
more than one half as long as the capsule; peristome-teeth reddish-brown below, pale and 
papillose above, without a distinct median line, the outer plates below nearly smooth, upward 
becoming finely papillose, with outer articulations prominent, about 12 » apart: spores min- 
utely roughened, up to 16 w in diameter. 
Type Locality: Europe. . . . 
DISTRIBUTION: British Columbia to California, eastward to Idaho; also in Europe, Asia, and 
Africa. 
ILLUSTRATION: B.S.G. Bryol. Eur. pl. 25. . . 
Exsice.: Sull. & Lesq. Musci Bor. Am, ed. 2.48; Macoun, Can. Musci 25; Ren. & Card. Musci 
Am. Sept. Exs. 202. 
2. Dicranoweisia crispula (Hedw.) Lindb. Oefv. Sv. Vet.-Akad. 
Forh. 21: 230. 1864. 
Weisia crispula Hedw. Sp. Musc. 68. 1801. 
Weisia eee C. Mill. & Kindb.; Macoun, Cat. Can. Pl. 6:14. 1892. 
Monoicous: male flower either at the base of the perichaetium or terminating a branch, of 
about three short-ovate, costate or one half costate, entire leaves enclosing numerous antheridia 
and paraphyses: plants in compact, yellowish-green or sometimes blackish cushions, 1-2 cm., 
rarely up to 4 cm. high: stem-leaves spreading on all sides, crispate when dry, up to about 4 
mm. long, from a narrowly ovate or oblong base gradually narrowed toa grooved, entire point, 
somewhat rough on the back with mamillose cells, the margins somewhat incurved ; costa 
nearly percurrent, mostly 40-55 « wide at the base and one third to one fifth the width of the 
leaf-base; alar ‘cells mostly distinct, colored, enlarged, short-quadratic; lower leaf-cells rect- 
angular or linear, with thickened walls, toward the costa usually 6-12 times as long as wide, 
toward the margin shorter and broader, the upper ones short, oblong to slightly transversely 
