BARNES NORTH AMERICAN MOSSES. 269 



79. Dicranum scoparinm snleatum Ren. & Card. Tufts yellowish, 

 habit more slender: leaves erect or spreading, sometimes flexuous or even 

 a little twisted, narrower, longer and more slenderly subulate, teeth more 

 salient and pointed; cells delicate, generally chlorophyllose, less pitted: seta 

 slenderer, strongly twisted to the right, pale; capsule dark red, distinctly 

 plicate when dry. Fl. Miq. 44. Miquelon Island. 



80. Dicranum scoparium spadicenm Boul. Nearly identical with 

 European plant: leaves erect, entire or sub-entire, acumen smaller, sub- 

 obtuse, costa vanishing below apex; cells sinuous and pitted. Fl. Miq. 

 44. D. spadiceum Zett. Miquelon Is.; Rocky Mountains. 



81. Dicranum scoparium orthopliylluni Brid. Leaves rigidly erect, 

 when dry appressed, coarsely dentate. Limpr. Laubm. 1: 352. Vancouver. 



82. Dicranum scoparinm curvnlum Brid. Stems arcuate ascendent; 

 leaves falcate-secund, narrower, yellowish-green; capsule shorter. Husn. 

 Muscol. Gall. 35. Oregon and Washington. 



83. Dicranum scoparinm crispulum De Not. Plants low: leaves crisp- 

 ate when dry. Washington. 



84. Dicranum cousobrinnm Ren. & Card. Densely cespitose, yellow- 

 ish green: stems erect, simple or dichotomous, tomentose, 5-8 cm. long: 

 leaves rather crowded, secund or erect spreading, narrowly lanceolate-sub- 

 ulate, serrate in the upper half; costa serrate at the back toward the apex; 

 cell-walls porose, scarcely thickened: perichaetial bracts sheathing, trun- 

 cate or emarginate at the apex, sometimes muticous, generally tipped with 

 a short or little elongated subula: seta yellow, sub-flexuous; capsule cernu- 

 ous or horizontal, narrowly cylindraceous, curved, not sulcate, long attenu- 

 ate below, rufescent when old; lid long subulate: male plants gemmaceous, 

 nidulant in the tomentum of the female stems. Bot. Gaz. 15: 39. 1890. 

 Minnesota. 



85. Dicranum Bonjeani Schlotthaueri Barnes. Mostly olive green: 

 stem very short, 1-2 cm. high: leaves shorter and broader, margin entire 

 or with a few indistinct teeth at the apex, often somewhat revolute. Bot 

 Centralbl. 44: 386. 1890. Oregon; Washington; Idaho; Wyoming. 



86. Dicranum Bonjeaiii Kocllii Barnes. Plants robust, in deep ex- 

 tended quite lax tufts, 4-8 cm. high, below pale, above yellowish green: 

 leaves crowded, not undulate, lanceolate, entire, acuminate; costa vanish- 

 ing in the acumen, only faintly canaliculate on the back and not toothed. 

 LOG. cit. Vancouver. 



87. Dicranum Bonjeani alatum Barnes. Dark green, 4-6 cm. high: 

 leaves lanceolate, very sharply toothed; costa 2-3 cells thick, with 2-3 

 sharply toothed lamellae; laminal cells shorter and broader, less thickened 

 and less strongly pitted. LOG. cit. Chicago, Ills. 



88. Dicrauum brachycaulon Kindb. Allied to D. spurium: stems 

 short, only 1 cm. high: the leaves smaller and shorter, oblong-ovate, acute, 



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