304 REMARKS ON SOME FEATURES OF 
United States, it seems difficult for American botanists to. 
realize that it does not extend into Canada through some of the 
valleys that connect the two countries. It was attributed to. 
Canada by Michaux. Like the Cercis, it was included in 
Hooker's Flora Boreali-Americana, an authority of Pursh; and 
even in Dr, Asa Gray’s last and greatest work, the Synoptical 
Flora, it was recognized as Canadian. The fact is, however, 
that we have no actual evidence of the occurrence of this species. 
in British America. The only definite record to the contrary is. 
that of Mr. B. Billings, Jr., who thirty years ago included the 
name in a list of Prescott Plants published in the Annals of the 
Botanical Society of Canada. Mr. B., however, found, some 
some years later, that he had mistaken a broad-leaved form of 
K. angustifolia for the more southern species. That the southern 
limitation of certain woody plants is not due to unsuitable 
climatal conditions in the north at the present time is shown 
by the readiness with which such plants grow when planted, as 
in the case of the southern Rhododendron Catawbiense, which 
has flourished in a remarkable manner at Lucyfield, near 
Halifax, growing freely, and forming thickets of from ten to. 
fifteen feet in height, blossoming abundantly, and spreading 
itself by seed to adjoining grounds. Indeed it is a much more 
robust plant and more rapic grower than the native A. maa- 
mum, which seems to be now almost extinct in Nova Seotia, and 
to have become very rare in the Province of Quebec. At Lucy- 
field, Rhododendron ponticum has not survived, although large 
numbers have been planted, while Azalea pontica that grows. 
with it in beech woods in the Caucasus, is perfectly hardy and 
grows as vigorously as any native bush, 
Of other plants in Mr. Kearney’s collection may be noticed 
the oil nut, Pyrularia pubera ; sassafras (the Lawrus Sassafras 
of Linneeus, Sassafras officinale of Nees and Esenbeck, and of the: 
forthcoming volume of Hortus Kewensis), the fruit as well as. 
the bark of the root of which yields sassafras oil. This species, 
although indicated in books such as Lindley’s Flora Medica, as 
growing generally in “ woods of North America from Canada to. 
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