— io6 — 



11. Costa vanishing below apex M.hornum. 



Costa reaching apex 12. 



12. Costa toothed on the back; cHoicous 13. 



Costa not toothed on the back; synoicous 14. 



12,- Costa excurrent in upper leaves; leaf cells 0.18-0.030 mm. 



.1/. pseudol ycopodioides. 



Co?ta percurrent; leal' cells about 0.015 mm 



.1/. orthorryhnchum. 



14. Capsules clustered .1/. spinulosum. 



Capsules solitary .1/. marginatum. 



It is to be regretted that the question of plant names should 

 arise to bother beginners, but many of those in Lesquereux and 

 James' Manual are untenable. We have chosen to use the nomen- 

 clature of Braithwaite's "British Moss Flora," which is also fol- 

 lowed in the editor's "X'ermont Mosses." Mrs. Smith very kindly 

 contributes a table of synonyms. 



In using the key it will be well to remember that M. ciispi- 

 datiim, var. ntgicioii often has entire lea\es. The American M. 

 lycopodioides of L. ^.'v: J. is doubtfully the same as the European 

 plant of the same name, and hence was called .1/. psciidolycopo- 

 dioides C. M. & Kindb. Mrs. Britton informs us that the plant 

 we described in the July issue as .1/. pioulatiiiu is really the variety 

 elatum. The variety grows on the ground in bogs, while the species 

 grows on wet stones and is much smaller. 



The writer has found M. stellare and M. ciucUdioides abun- 

 dant in Plymouth, X. H.; both sterile except a very few capsules 

 of M. stellare. M. stellare grows on humus at the base of trees 

 in swampy woods. .1/. cincloidioides in the swampy places near 

 bv; it resembles M. pnnctatum, var. elatum in appearance, but is 

 easily distinguished by the non-margined leaves. 



Mrs. E. G. Britton very kindly furnished us with a list of the 

 Mniums of this region, and has promised an article on their habi- 

 tats and distribution for the January issue. — .4. J. G. 



SYNONYMS. 



In the list of species of Mnium found in eastern United States 

 the first name given is the one used by Dr. Grout in his keys. B. 

 stands for Braithwaite, "British Moss Flora;" L. &■ J. for Les- 

 quereaux & James, "Manual of Mosses of N. A.;" D. df J. for 

 Dixon & Jameson, "Student's Handbook British Mosses," and 

 H. for Husnot. "Muscologia Gallia?." In cases where any of 

 these authorities are omitted, it means that the moss is not treated 

 by those authors: 



