Preface 



The present number of "M ini 

 the third edition of "Spring Flowers." It is pre] 



hools to begin work with flowering plants in tl i 

 dent some preliminary knowledge and training as a ba 

 work in the spring. For this reason, cultivated •; 

 included, and special attention is given to tl i 

 play such a large and practical part in fall vegetation. An ei 

 to include all the specie- found in bloom alter September first 

 to bloom in July and August, SO that autumn and spril 

 fairly well for the recognition of the summer 



generally, as well as for the increasing number • and high 



greenhouses, all of the common species blooming during the wintei 

 also. 



The flowering plants of the whole school year, from September i I 

 cultivated and native, are now covered by the two guides to spring fl< 

 autumn flowers. In a few year- it is expected that a summer guide will I 

 in anticipation of the time when a completely illustrated book of all the fl 

 state will be possible. 



Britton and Brown's "Illustrated Flora" and Gray's "Manual" 

 drawn upon in the preparation of the present guide, and acknowledgmei I 

 made of their aid. The grouping <>i the families is essentially that 

 system of classification. The sequence is from pines and 1. utter, 

 mints to roses and asters, and then to lilies, grasses and orchids. 



In addition to the list of publications in the following series, "Minn* 

 and Shruhs" is also available for students and plant lovers generally. In 

 supplants the "Guide to Trees and Shruhs." which will not be republish* 

 "Minnesota Algae" is also valuable for schools, health officers, water and 

 missioners, as well as to others who possess micr< - 



MINNESt >TA PLANT STUD! 



i. Guide to Spring Flowers, third edition 



2. Guide to Trees and Shrubs, second edition 



3. Guide to Ferns and Fern Allies 110 cents). , 



4. Minnesota Mushrooms (paper. 50 cents; cloth, . c I 



5. Guide to Autumn Flowers (15 cento. 



6. School Gardens and Greenhouses (15 cents). (In prepai 



Copies of the above publications ate sent free to resident 

 copies of Nos. I. 5 and 6 will be furnished tree to the sell 

 Additional copies may be Secured at the price indicated This is the ; 

 non-residents, who are not on the exchange list of the 



FREDERIC l CLEW 

 ' of the Departmi 



The University of Minnesota 



May, 1913. 





