670 The American Naturalist. [August, 
composing it are of a more or less transcontinental distribution, but 
often characteristic of a higher latitude. Some can be said to belong 
to the Rocky Mountain Region. The only trees of western origin are 
Pinus ponderosa scopulorum, and Betula occidentalis; the others are 
eastern, or transcontinental. The flora resembles, therefore, more that 
of the region around the Great Lakes than that of the Rockies.” 
It merely remains to say that the nomenclature and capitalization 
(all specific names decapitalized) of this interesting and valuable re- 
port are of the most advanced type—CHARLEs E. Brssry 
Trelease’s Hickories and Walnuts ofthe United States.— 
Dr. Trelease has rendered a good service to the botanists of the country 
by publishing (in the Seventh Annual Report of the Missouri Botan- 
ical Garden) the results of his studies of the Juglandacex of the United 
States, especially with reference to their winter characters. The species 
recognized are: 
Hicoria pecan (Marshall) Britton—lIowa to Southern Indiana, 
Kentucky, Louisiana and Texas, extending into Mexico. 
H. myristiceformis (Michx. f.) Britton —Arkansas to Alabama, Texas 
and Mexico, and in South Carolina. 
H. aquatica (Michx. f.) Britton.— Virginia to Florida, around the 
Gulf to Texas, thence north to Arkansas and southern Illinois. 
H. minima (Marshall) Britton —Canada and Maine to Minnesota 
and Nebraska, south to Texas and Florida. 
H. glabra (Miller) Britton.—Atlantic region from Massachusetts 
and Pennsylvania to Florida.—var. odorata (Marshall) Sargent.— 
Mississippi valley eastward, and from Canada to the Gulf.—var. villosa 
Sargent.—Missouri, on flinty hills—var. microcarpa (Nuttall) Sar- 
gent.—Same range as var. odorata. 
. H. alba (L.) Britton —Canada to the Great Lakes and Kansas, 
south to Texas and Florida. 
H. mexicana (Engelm.) Britton.—-Mexico, in mountains of Alvarez. 
H. laciniosa (Michx.) Sargent—New York and Pennsylvania to 
Iowa, Kansas and the Indian Territory. 
H. ovata (Miller) Britton.—Canada to Minnesota, south to Florida, 
Kansas and Texas 
Juglans cinerea p ates Brunswick to Dakota, Kansas, and the 
Mountains of Georgia and Alabama. 
d. rupestris Engelmann.—Texas, New Mexico and Arizona, extend- 
ing into Mexico. 
J. californica Watson.—Coast range of southern California, 
