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New or Interesting Species from Montana. 



Reprinted from "A Preliminary List of Montana Mosses," by R. S. "Williams. 

 From Bulletin of the N. Y. Bot. Gardens, No. 7, April 25, 1902. 



Dicranoweisia (f(9w/«(f/<« (Schleich.) Schimp, An alpine species growing 

 in compact tufts with smaller leaves than the preceding crispitla), basal 

 leaf-cells shorter and thinner walled and teeth not so deeply inserted imder 

 the mouth of the capsule. Forty-mile Cr., Blackfeet Ind. Reserv. ; Essex, 

 G. N, Ry., 7,000 ft.; Stanton Lake, Rocky Mts., 7,000-8,000 ft. (422). 



Dichodojitiimi flavescens (Dicks.) Lindb. A common species in the 

 Rocky Mts. of northern Montana, on wet rocks about the falls and along 

 streams. Distinguished from any form oi pel liicidiun by the leaves compar- 

 atively smooth above and teeth of the margin separated by 3-5 or more in- 

 tervening cells. In the preceding [D. pelluciditm fagi7no7itanum) each 

 marginal cell forms more or less of a tooth in the upper part of the leaf (269). 



Dicramnn hispiduhini n. sp. (Plate 34) Monoicous, perigonium close 

 under the perichaetinum, of 4 or 5 broad, more or less pointed leaves mostly 

 costate. In compact tufts much like the smaller forms of D. Starkei. Stems 

 usually without radicles and few branches, up to 2.5 cm. high, the cross- 

 section nearly round, .180 mm. in diameter, with distinct central strand and 

 outer cells with but slightly thickened walls. Leaves spreading all around, 

 rough on back and margins above with irregular, mamillate papillae, ovate- 

 lanceolate, mm. long, cross-sections showing no stereid band or distinct 

 guide cells, the cells on either side of costa near middle of leaf often doubled 

 for five or six rows outward. Costa excurrent, usually .040-050 mm. wide 

 at the base and .050-.080 mm. above. Leaf cells scarcely elongated and ir- 

 regular in upper part, medium cells .010 mm. wide and .010-.020 mm. long, 

 alar cells forming a distinct group of somewhat enlarged, nearly square or 

 inflated more or loss colored cells. Cell walls not pitted or distinctly thick- 

 ened. Capsule oval, slightly curved before opening and barely strumose, 



mm. long without lid. Lid obliquely rostrate, about ^ mm. high. Exo- 

 thecal cells rectangular, 2-4 times longer than broad. Well developed an- 

 nulus of 2-3 rows of cells. Teeth split to below the middle. Smooth spores 

 up to .012 mm. 



This species is somewhat intermediate between H. Slarkei and. H.falca- 

 tum. It differs from both in the leaves being only half as long and scarcely 

 falcate or secund. The first also has leaf -cells with thickened and pitted 

 walls and cells twice longer, while the second has a poorly developed annu- 

 lus, alar cells less distinct, and the exothecal cells shorter and broader, from 

 roundish to one and one-half times longer than wide. Collected at head of 

 Macdonald Lake, Aug. 3, 1895, with capsules not quite mature (323). 



Barbula terannulata n. sp. (Plate 36). Dioicous. Plants small, 

 cm. high. Upper leaves mostly linear with broad, obtuse or slightly acute 

 point. Outer perichaetial leaves very similar with slightly enlarged base, 

 the middle with a more or less distinct limb, and the 2 or 3 inner, convolute 

 with a distinct, narrowed point usually % or more the length of the clasping 



