130 NORTH AMERICAN FLORA [VoLumyE 15 
point up to about two thirds (1-2 mm.) as long as the broader part: seta solitary, yellow, 
sometimes turning reddish, about 2 cm. long: capsule 2-2.5 mm. long, cylindric, curved, 
slightly nodding, its length about 3 times its diameter, when dry more or less furrowed, not 
strumose, with distinct annulus; peristome-teeth vertically striate, divided to below the middle, 
the articulations of the inner plates one third up the teeth 25-40 « apart: spores rough, up to 
20 4 in diameter. (Description of sporophyte from Yellowstone Park specimens collected by 
A. and E. Nelson.) 
TYPE LOCALITY: Mountains of southern Tyrol, Austria. 
DistRIBUTION: British Columbia, Oregon, Montana, and Wyoming, alpine on rock; also in 
Europe and Asia. 
D. algidum, according to Kindberg, has leaves not convolute, but in specitmens named by him 
the leaves are convolute or tubulose just as in D. neglectum. Otherwise his description and Macoun’s 
specimens, Can. Musci 32a, agree well in every way with D. neglectum. ‘This last is known 
from D. scoperium by its excurrent costa and annulus; from D. Mihlenbeckii by its narrower, more 
pitted leaf-cells and leaves more erect-spreading and straighter when dry; from D. brevifolium by its 
elongate, pitted cells extending to the middle of the leaf or above and also by straighter more spreading 
leaves; D. brevifolium has short-rectangular not pitted cells extending two thirds down leaf or more. 
30. Dicranum scoparium (L,.) Hedw. Fundam. 2: 92. 1782. 
Bryum scoperium 1,. Sp. Pl. 1117. 1753. 
Dicranum pallidum C. Mill. Syn. 1: 359. 1848. Not D. pallidum Weber & Mohr, 1807. 
Dicranum mexicanum Schimp.; Besch. Mém. Soc. Sci. Nat. Cherbourg 16: 164. 1872. 
Dicranum Howellit Ren. & Card. Bot. Gaz. 14:93. 1889. 
Dicranum angustifolium Kindb.; Macoun, Bull. Torrey Club 17: 86. 1890. 
Dicranum canadense Kindb.; Macoun, Bull. Torrey Club 17: 87. 1890. 
Dicranum Kindbergii Paris, Index Bryol. 356. 1895. 
Dicranum scopariiforme Kindb. Eur. & N. Am. Bryin. 193. 1897. 
Dioicous: male plants minute, attached to tomentum of the fertile stems, or large and 
in more or less separate tufts: fertile plants in extensive, compact, mostly glossy-green tufts, 
with tomentose stems up to 10 cm. high: stem-leaves usually curved-secund, lanceolate- 
subulate, subtubulose above, up to about 9 mm. long and 1.5 mm. wide, rarely undulate, 
serrate about one third down the margin; leaf-blade smooth on the back; costa not quite 
percurrent, up to 120 » wide near the base and one seventh the width of the leaf, with more or 
less prominent, serrate wings on the back above, rarely nearly smooth, in cross-section below 
showing 5—8 guide-cells with stereid-bands on either side, the band on the dorsal side more or less 
interrupted with larger cells; leaf-cells pitted and elongate throughout the blade, the median 
about 12 « wide and usually 2—4 times as long, the alar reddish-brown, not extending to the 
costa; inner perichaetial leaves nearly as long as the stem-leaves, with a clasping base either 
abruptly or gradually narrowed to a smoothish or serrulate point of variable length: seta 
solitary, yellowish or reddish, usually about 2.5 cm. long: capsule short-cylindric, about 3 
mm. long, curved, nodding, smooth or somewhat furrowed when dry, with a conic-rostrate 
lid nearly as long; exothecal cells with thickened walls, from square to elongate-hexagonal 
on the incurved side and 20-25 »% wide, longer and narrower on the convex side; stomata 
roundish, about 35 « in diameter and mostly in two rows near the base of the capsule; annulus 
wanting; peristome-teeth 100-150 u wide at the base, vertically striate, mostly divided more 
than one half down into 2, sometimes 3, reddish, papillose forks: spores papillose, up to 24 u 
in diameter. 
TyPE LOCALITY: Europe. ; 
DISTRIBUTION: Newfoundland to Alabama; Alaska to Mexico; Guadeloupe (C. S. Parker 1182, 
in herb. Mitten); also widely distributed in Europe and Asia. 
ILLUSTRATIONS: B.S.G. Bryol. Eur. pl. 74, 75; Braithw. Brit. Moss-Fl. pl. 22A. 
Exsice.: Drummond, Musci Am. 80; Sull. Musci Allegh. 155; Sull. & Lesq. Musci Bor. Am. 
59, 60, 61, 62; ed. 2.75, 76, 77, 78; Macoun, Can. Musci 36, 37; Holz. Musci Acroc. Bor. Am. 7, 
55, 176, 206. ~<A / 22 
31. Dicranum consobrinum Ren. & Card. Bot. Gaz. 15: 39. 1890. 
Dioicous: male plants minute, on tomentum of the fertile stems: fertile plants in densely 
cespitose, yellowish-green tufts; stems erect, simple or dichotomous, tomentose, 5-8 cm. long: 
leaves rather crowded, secund or erect-spreading, narrowly lanceolate-subulate, serrate in the 
upper half, 6-7 mm. long, 0.75-1 mm. wide at the base; costa serrate on the back toward the 
apex; cell-walls thickened, porose, elongate throughout, the median 8-12 wide and 20-30 u 
