104 THE PLANT WORLD. 



have been worked up by the resident active members into available 

 form for consultation and study. A herbarium of about 10,000 

 specimens is one of these results. This is much more than a mere ag- 

 gregation of mounted specimens, much labor having been expended 

 upon it to make it show the distribution of species. For this purpose 

 outline county maps of the state are attached to the species sheets, and 

 on these each station is shown by a red stamp. For many species this 

 has been carried out quite completely, the map being well dotted over 

 with station stamps, while for others the work has just begun. When 

 this has been done for all the species, the Survey Herbarium will pos- 

 sess unusual value from the phytogeographical standpoint. 



The formal publications of the survey began in 1892 with No. i 

 of its series of " Reports," this being a preliminary announcement. 

 No. 2 followed in 1893, containing reports upon two somewhat ex- 

 tended explorations, and a list of additional species discovered in the 

 state. A year later No. 3 appeared, including many additions to the 

 list of species, a bibliography of the flora of Nebraska, a list of botani- 

 cal expeditions made in the state, and a revision of the nomenclature 

 of the Nebraska Polypetalae. The fourth report appeared in 1896, 

 and included many new species of fungi and an extended list of other 

 additions, amounting to fifty-five new species ; and over three hundred 

 others. These several lists of additions brought the total number of 

 species for the state to very nearly thirty-two hundred. 



In 1893, the "Flora of Nebraska" was projected, and in August of 

 1894, parts I and 2 appeared, including descriptions of all the known 

 Protophytaand Phycophytaof the state, and in addition the holophytic 

 Carpophyta. These parts are illustrated by thirty-six full-page plates, 

 including over three hundred figures. In December, 1895, another 

 part of the Flora (21) appeared, devoted to the Rosales, and involving 

 a treatment similar to that accorded to the lower plants. 



During the two years past much attention has been given to the 

 arrangement of the facts thus far observed into such order as would 

 serve as a basis of the phytogeography of the state. From time to time 

 papers have been prepared and read in the public meetings of the 

 Seminar. The following are some of the titles: "The Plant-forma- 

 tion as an Element," " Mycological Statistics of Nebraska," "The 

 Periodicity of Flowering," "Herbaceous Vegetation-Forms," "Eco- 

 logical and Distributional Statistics of Nebraska Grasses," "The Hab- 

 itat-groups of the Prairies. " These phytogeographical studies have been 

 brought together in a volume entitled the "Phytogeography of Ne- 

 braska," now in course of publication by two members of the Seminar. 



In the phytogeographical work already done it has been possible 

 to trace the boundaries of the botanical regions and districts with a 



