1906] Pease & Moore, — Botrychium lanceolatum 229 



PECULIARITIES OF BOTRYCHIUM LANCEOLATUM IN 



AMERICA. 



Arthur Sta\i>kv Pease atid Albert Hanford Moore. 



While recently examining at tlio Gray Herbarium specimens of 

 Botrychium lanceolatum (Gmel.) Angstr., we were struck by the dis- 

 similarity of the European and American material. The European 

 plants are distinguished by a coarser habit and by the broader and 

 much more approximate segments of the sterile frond. And their dif- 

 ferences are illustrated not only by the European specimens .in the 

 Gray Herbarium, but also by various plates, among them Flora Danica, 

 vol. xvii, pi. 1922, fig. 2 (1877). The ordinary American plant is well 

 represented by the plate in D. C. Eaton, Ferns of North America, vol. 

 i, pi. 5, fig. 2 (1879). A specimen from the island of Unalaska, col- 

 lected in 1881 by L. M. Turner agrees with the European plant. 

 The following description gives the salient features of the common 

 American plant: 



Botrychium lan(;eolatum ((Jmel.) Angstr. var. angustisegmen- 

 tum Pease et Moore var. nov. pinnarum segmentis distantioribus 

 quam in speciei exemplis angusteque lanceolatis insignitum. — 



Type specimen: Maixe, Bristol, July 19, 1897 {E. B. Chamberlain, 

 no. 354, in herb. N. E. B. C). 



Other specimens examined: Nova Scotia, Truemanville, July, 

 1885 {H. Trueman): New Brunswick, Fredricton, September Ki, 

 1872 (J. Fowler): Mauve, Bridgewater, 1881 and 1882 {K. Fur- 

 hish); Brownville, July 1, 1905 (./. C. Parlin); Dover, June 24, 1895 

 (M. L. Fernald); North Berwick, 1893 (/. C. Parlin): New Hamp- 

 shire, liandolph, 1900 (A. S. Pease, no. (5); Mt. Chocorua, 1904 

 (W. G. Farlow); Flat-top Mt., Sandwich, June 17, 1899 (J. H. Sears); 

 Alstead, July 4, 1899 (M. L. Fernald, no. 174): Vermont, Equinox 

 Mt., July 3-4, 1903 (W. W. Eggleston, no. 3172): Massachusetts, 

 Andover, June 28, 1902 (.1. S. Pease, no. 5); Sudbury (E. and C. E. 

 Faxon); Adams, August 27, 1901 (J/. A. Day, no. 100): New 

 York, Palisades (C. F. Austin): New Jersey, Closter, August, 1865 

 {C. F. Austin). 



Cambridge, Massachusetts. 



