A REVISION OF KALM’S HER¬ 
BARIUM IN UPSALA 
BY 
H. O. JUEL 
I N A PREVIOUS PAPER, PUBLISHED IN THE 3RD VOL. OF 
this periodical, I have given some information about Kalm’s contribu¬ 
tions to the investigation of the North American flora. The same paper 
also contains a description of the collection of N. American plants 
which he had presented to Queen LOVISA Ulrika and which is now kept 
in the Botanical Museum in Upsala. I have submitted this collection to 
a critical revision, and although many of the specimens are poor, as is 
often the case with herbarium specimens from that time, I was able to 
identify most of them with the help of modern works on the N. American 
flora, such as A. Gray, Synoptical flora of N. America, ROBINSON and 
Fernald, Gray’s new manual of botany, N. Y. 1908, and Britton and 
Brown, An illustrated flora etc., N. Y. 1913. 
The collection of plants which Kalm brought home from his travels 
in Pennsylvania and Canada seems to have been very large, and he gave 
Linnaeus a specimen of each species. Of the importance of this contri¬ 
bution to Linnaeus’ herbarium we can judge from these words of A. 
Gray 1 : »By far the greater part of the N. American plants which are 
found in the Linnaean herbarium were received from Kalm, or raised from 
seeds collected by him.» LlNNyEUS made use of these specimens to a 
great extent in elaborating his systematic works, particularly Spec, plant, 
of 1753 - To ninety of the N. American species described in this and 
other works of LlNN/EUS there is attached a reference to Kalm, and in 
most cases these species are provided with more or less detailed descrip- 
1 Notices of European herbaria, particularly those most interesting to the N. American 
botanist (Amer. Journ. of Science and Arts, vol. 40, 1841). 
