12 VERMONT MOSSES. 



DICRANUM Hedw. 



I. — Capsule erect, symmetric. ?• 



Capsule cernuous, arcuate. 2- 



2. — Leaf cells pitted. 3- 



Leaf cells not pitted or only faintly so. 5- 



3. — Leaves mostly transversely undulate. 4. 



Leaves not undulate. 6. 

 4. — Upper leaf cells elongated; capsules clustered. undulalum. 



Upper leaf cells isodiametric; capsules solitary. Bergii. 



5. — Leaves little or not at all secund, strongly crispate when dry, upper cells irregular. 



Mulenbeckii. 



Leaves secund, not crispate, upper cells regular. fuscescens. 



6. — Tufts loose ; longitudinal lamellae ot back of costa dentate. scoparium. 



Tufts compact ; costa dentate at summit, without lamellee. Muhlenbeckii. 



7. — Margin of leaves entire, apex usually broken. viride. 



Margin serrate or at least denticulate near apex. 8. 



8. — Costa excurrent. 10. 



Costa vanishing at the serrulate apex. 9. 



g. — Subulate apex short, papillose at back. montanum. 



Subulate apex elongated, smooth at back. Ilagellare. 



10. — Leaves erect or subsecund, crispate when dry. fulvum. 



Leaves falcate-secund, not crispate when dry. 11. 



II. — Costa J^ width of base; leaves gradually narrowed into a subulate point. Sauteri. 



Costa % width of base; leaves suddenly narrowed into a very long setaceous point. 



longifolium. 

 D. Bergii Bland. Peacham, Bl. 



D. flagellare Hedw. Rotting wood in shady places; not uncommon. 



D. fulvum Hook. On rocks in shady places. Manchester, O.; Stowe,J?. 



D. fuscescens Turn. On rocks and decayed wood in moist places; fre- 

 quent in mountainous regions. 



D. longifolium Ehrh. Devil Hill, BL; Mt. Mansfield, B.; Willoughby 

 Mt. and Jay Peak, F. 



D. longifolium subalpinum Milde. Bare rocks on the "Nose" of Mt. 

 Mansfield, G. (Det. R. H. True.) The only known locality in the 

 New World. 



D. montanum Hedw. Carriage road, Mt. Mansfield, F. 



D. Muhlenbeckii Br. & Sch. Rock Point, Burlington, Eggleston. Pet. 

 Prof. R. H. True. The Vermont specimens occasionally mature 

 two capsules from one perichsetium. 



