VASCULAR PLANTS OF NORTH DAKOTA 7 1 



12 1 6. Cirsium arvense var. horridum Wimmer & Grabowski, 

 Fl. Silesiaca II: 92. (1828). 



Leeds, and everywhere. 



12 1 7. 1 2 18. Epithymum indecorum and E. Gronovii to be 

 found next after No. 844, E. Coryli, in Vol. IV: 511. (19 16). 



LEUCACANTHA (Asvxaxai&Y]) Diosc. 3. 19. YlavrahovSa 

 Theophr. h. p. 6. 5. Kixxwc;, a floris cyaneo colore, Plin. 21: 8, 

 11. Centaur ea 263. (1737). 



1 2 19. Leucacantha imperialis (Hauskn.) Nwd. & 1,11. 

 Centaurea imperialis Hauskn. ex. Bornm. Beitr. Bot. Centralbl. 



XX. II. 68. (1906). 



Occasional escape from gardens. Leeds. 



1220. Agalinis aspera to be found next after No. 927, in 

 Vol. V. 7: (1917). 



122 1. Monotropa uniflora to be found next after no. 793, 

 in Vol IV: 503. (1916). 



1222. Leucacantha Cyanus (Linn.) Nwd. & 1.11. 

 Centaurea Cyanus Linn Sp. PI. 911. (1753). 

 Fargo (CI. Waldron). 



PLANTS OF MANHATTAN AND BLUE RAPIDS, 

 KANSAS, WITH DATES OF FLOWERING— I. 



BY O. A. STEVENS. 



Under this title it is intended to bring together the writer's 

 observations made chiefly during the years 1904 to 1909 inclusive. 

 The list is fairly complete, comprising about 600 species, speci- 

 mens of practically all of which were collected and are now deposited 

 with the Blue Rapids High School. The dates of flowering refer 

 only to the beginning of the flowering period and are the results 

 of a practise of recording each season the first flowers seen, together 

 with a note on the approximate time which it was believed the species 

 had been in flower. Many of these records are of common plants 

 under constant observation and quite accurate. Others are doubt- 

 less subject to correction. 



In recording the time of flowering it has seemed advisable to 

 divide the month into periods of five days each, using the days 

 5, 10, etc.; also giving the exact average date where the dates 



