— 9- 



with very fine mesh, while those of 5. imbricatum, though somewhat 

 irregular and often curving in direction, tend to run parallel with 

 rather than cross each other, only occasionally forking. The species 

 shows no other characters suggesting relationship with 5. imbricatum, 

 but is obviously more closely related to 5. palusire; the numerous, 

 clearly defined, nearly round pores on the outer surface of the branch- 

 leaves give a distinctive appearance noted also by Warnstorf in the 

 original description. The recognition of this species is one of Warn- 

 storf 's most valuable contributions to North American sphagnology. 

 This in spite of the fact that he seems to have forgotten it for a time, for 

 specimens of it collected by Mr. H. H. Bartlett in Georgia received 

 from Warnstorf the herbarium-name 5. Bartlettii, only to be reduced by 

 him later, according to a letter from Mr. Bartlett, to 5. henryense as its 

 variety Bartletiii. They correspond entirely with his description of 

 the species and form the basis of my knowledge of it, as I have not 

 seen the type. According to Mr. W. R. Maxon, through whose kind- 

 ness I was enabled to see the types of the species proposed 

 by Warnstorf from Kearney's Dismal Swamp collections, there 

 is no specimen of 5. henryense in the U. S. National Herbarium, so it 

 is evidently accessible only in Warnstorf 's herbarium, now the prop- 

 erty of the Berlin Botanical Museum. Other specimens entirely iden- 

 tical collected by Bartlett in the same locality as his 5. Bartlettii 

 ^Branch Swamp, McDuffie Co., Ga.) were wrongly named by Warn- 

 storf, S. subbicolor Hampe, 



In 1907^^^ Warnstorf described 5. alegrense from Brazil, character- 

 ized by the same condition of the cell walls, erroneously stating it to 

 be his first observation of this character in the genus ; whether it is 

 really distinct from 5. henryense I should not undertake to say from 

 the description, though the chlorophyll cells are described as of some- 

 what different section. 



In looking through the material of the New York Botanical Gar- 

 den, I find one other specimen of our spec'es from Delaware (Laurel 

 collected by Commons, 1893, No. 65), which leaves its present known 

 distribution Delaware, Virginia, Georgia. It is then one of the 

 species characteristic of our southern Atlantic coast, as for example 

 5. porforicense, and may be looked for from New Jersey to Florida, 

 Its organs of fructification as well as its fruit are as yet unknown, 



Ithaca, N. Y. 



(1) Hedwigia47: 83,/ 



