198 



A matter for investigation is the relationship between H. besseyi 

 and H. apricus Lunell, Amer. Midi. Nat, 1910, 237. The latter 

 species, found on the open prairie in North Dakota, differs from 

 besseyi by the narrower leaves, and the involucral bracts in two 

 rows. The description is not sufficiently detailed to permit 

 adequate comparisons. In the herbarium of the New York 

 Botanical Garden I have examined H. apricus camporum (Lunell) , 

 from the type lot. This variety has leaves shaped as in besseyi, 

 but more remotely dentate, and (according to the description) 

 scabrous beneath. H. nitidus Lunell, from the description, 

 seems more like H. nebrascensis, but the rays are less than half 

 as long. — T. D. A. Cockerell 



Boulder, Colorado 



The Supposed Southerx Limit of the Eastern Hemlock. — 

 The common hemlock of the eastern United States — or spruce 

 pine as it is often called in the South — Tsuga Canadensis, has 

 long been known to range farther south in Alabama than in any 

 other state. Dr. Charles Mohr knew it in this state only from 

 a few localities in Winston County, at altitudes exceeding 800 

 feet, where it was probably first made known by Judge T. ]\L 

 Peters about fifty years ago.* In March, 1906, I found it near 

 Spruce Pine, in Franklin County, f and in November, 1911, 

 in the northeastern portion of Marion County and at the great 

 natural bridge in the southwestern part of Winston County. | 



About tw^elve years ago a friend in Tuscaloosa wrote me that 

 he had seen a hemlock tree floating in the Warrior River near that 

 place at a time of high water, and wondered where it had come 

 from. The nearest known stations for it at that time were in 

 Winston County, about 60 miles from Tuscaloosa in a straight 

 line and at least 100 by water, but the tributaries of the Warrior 

 River there are so small and so rocky that it was hard to believe 

 that a tree could have floated all the way and remained recog- 

 nizable. The facts set forth below, however, explain how such 

 a tree could have reached Tuscaloosa with a much shorter 

 journey. 



* See Mohr's Plant Life of Alabama (1901), pp. 34, 72, 159, 208, 324, 325. 



t Bull. Torrey Club 33: 524-525- 1906. 



X Geol. Surv. Ala., Monog. 8: 49, 136. 1913. 



