SURVEY OP MINNESOTA. 65 



an independent observer. Therefore rt eated verifications of an observed 

 variation or peculiarity, or of a species not named in the familiar text-books, 

 should be made before reporting such observation as a fact. 



2d. Collect and preserve as many specimens as possible. They will ex- 

 emplify the local flora of your region, and will serve as duplicates for 

 exchange with other portions of the state and with foreign botanists. The 

 most valuable portion of your contribution to the survey will be, after all, 

 the collections which you may make and forward for careful identification. 



3d. It is the design of the Regents to collect together at the University, 

 a complete representation of the plants of the state as ordered by the law, 

 and to have them so arranged and exhibited that they can be seen for 

 comparison by any of the botanists of the state that may wish to examine 

 them. 



4th. For aid in the study of the flora of the state, the following works 

 will be useful : 



Gray's Ilanual of Botany. 



Torrey & Gray's Flora of North America, 2 vols., to Lobeliacece. 



De Candolle's Prodromus, 18 vols., down to Endogenae. 



U. S. Geological Exploration of the Fortieth parallel. Vol. V, Botany, 

 (Watson.) 



Pacific R. R. Reports. 



Transactions of the St. Louis Academy. 



Proceedings of the American Academy, Philadelphia. 

 . Catalogue of the Plants of Minnesota, by I. A. Lapham, published in the 

 Annual Report of the State Horticultural Society for 1875. Furnished by 

 the Secretary of the Society. 



Hayden's Nebraska Plants. 



Hooker's Fl. Bot. Am., 2 vols. 



Flora of Colorado, I vol., Porter & Coulter. 



Nuttall's Genera, 2 vols. 



Bentham's Genera, 4 parts. 



oth. It is evident that there is no botanist, nor even any public library in 

 the state that possesses the books necessary for the thorough study and 

 satisfactory determination of the species of our flora. Within certain limits 

 our flora can be studied, but the burden of our first efforts must be the col- 

 lection of specimens. Their exhaustive study can only be done by experts, 

 with the fullest facilities for comparison. 



6th. The present design of the survey is to act as a means of communi- 

 cation between botanists of the state, to enable them to compare specimens, 

 and as a depository for duplicates. To this end exchanges will be made 

 with such as desire to compare species, and any aid or information will be 

 rendered that it is possible to give. Lists of the local flora in different 

 parts of the state should be made out as thoroughly as possible, to judge of 

 the distribution of species. The areas that are covered with timber in the 

 various counties, or townships, and the kinds of trees, should be stated. It 

 is highly desirable that a local botanist be assigned to the working up of 

 each county. For this purpose, the survey should be furnished with the 

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