‘ 
254 Dr. Tully on Datura. 
of violence are every where visible in the large collections of 
logs and brushwood, and even of whole trees, accumulated in 
various places, and in the transportation of ponderous quartzy 
stones for many miles, and in the heaving of them up, on high 
masses of chlorite and mica-slate, to which they have no re- 
lationship. 
hould you, sir, ever find it convenient to cross the Green 
Mountain from Windsor to Middlebury, I hope you will 
take the trouble to view this admirable specimen of nature’s 
workmanship. The labor will, I assure you, be richly re- 
warded. Your very obedient 
F. HALL. 
BOTANY. 
Art. VII.— Diversity of the two sorts of Datura found in 
the United Siates. | 
Two sorts of Datura, which present considerable differ- 
ences to the eye, are well known to on in man 
parts of the United States. One of these has been general- 
supposed by botanists to be the Datura-Tatula, and the 
other the Datura-Stramonium of Linne. Their specific di- 
versity, as far as Lam informed, remained unquestioned till 
Dr. Bigelow advanced the opinion that they are mere varie- 
ties, and stated the concurrence of Sir James Edward Smith, 
who, it seems, made his decision from an examination of 
the specimens in the Linnean Herbarium. Mr, Elliott has 
since expressed his doubts upon the same subject. 
a most of the principal authorities, such as Linne, 
Gmelin, Willdenow, Persoon, Turton and many others in 
Europe, and likewise Muhlenburg and Pursh, in America, 
are in opposition to the opinion under consideration, yet, a5 
there can be no question that the decisions of the gentle- 
men above mentioned are entitled to the highest respect, I 
should not at this time venture to suggest any doubts of 
their correctness in the present instance, had not long-con- 
tinued and close observation convinced me, that they are, 
in fact, perfectly distinct. 
