188 Rhodora [OCTOBER 
marginal gemmae clearly for M. furcata but made no allusion to them 
in his description of M. conjugata, thus implying that they did not 
occur in this species. Goebel! goes still farther; he associates marginal 
“adventive branches” definitely with M. furcata, and says that M. 
conjugata is characterized: by the occasional production of gemmae 
of an entirely different type. Miss Boatman, to be sure, describes 
marginal gemmae for M. conjugata, but her statements have not been 
confirmed by subsequent writers and it seems probable that her 
descriptions were not drawn from the true M. conjugata. On the 
whole the evidence at present appears to indicate that the marginal 
gemmae of M. furcata yield important differential characters, and it 
seems safe to assume that such gemmae do not occur in M. conjugata. 
The writer hopes to discuss the vegetative reproduction of Metzgeria 
more fully in another connection. 
2. Metzgeria crassipilis (Lindb.) sp. nov. Metzgeria furcata, 
subsp. Metzgeria crassipilis Lindb. Acta Soc. Faun. Fl. Fenn. 1: 42, 
1877. On rocks. Vermont: Lake Dunmore (W. G. Farlow). 
Connecticut: New Haven (D. C. Eaton); Orange (J. T. Phinney). 
Although Lindberg, as already noted, saw no specimens of typical 
M. furcata from North America, he described a peculiar plant from 
the eastern United States under the above name, including it under 
M. furcata as a subspecies. He was able to study two specimens of 
this plant, one from Laurel Hill, Pennsylvania (Sullivant), and the 
other from Ben Lomond, Warren County, Tennessee (Fredriksson). 
Neither of these specimens has been accessible to the writer, but 
Lindberg’s description is so detailed and so clear that there can be but 
little doubt as to the correctness of the above determinations. For 
some strange reason M. crassipilis has been completely overlooked or 
ignored since its original publication but it is amply distinct from 
M. furcata, and Lindberg would undoubtedly have described it as a 
distinct species if he had had a more liberal supply of material at his 
disposal. It has a fairly wide distribution and the following localities, 
‚outside of New England, may also be recorded. New York: Chilson 
Lake (Mrs. Smith); Little Moose Lake (Miss Haynes); Shandakan 
(Miss Miller). West Virginia: Seebert and Warntown (J. L. Shel- 
don). Virginia: Nick's Creek and Walker's Mountain (J. K. Small); 
Dickey's Creek and Hungry Mother Creek (Mrs. Britton and. Miss 
! Organographie der Pflanzen 275. 1898. 
