118 



GENUS ARTEMISIA. 



experiments of Gmelin, who found that the seeds of odorous plants produced inodorous 

 individuals when grown in the botanical garden (according to Ledebour, Fl. Rossica 

 2:563, 1846). In the latest account of our species (Rydberg, N. Am. Fl. 34:244 to 285, 

 1916), aromatica is retained as a species and separated from the Old World dracunculus 

 on two principal characters: (1) the outermost bracts are said to be almost as long as the 

 innermost instead of only about one-half as long; (2) the flowers are given as 30 to 100 

 in number as compared with 20 to 40 in dracunculus. 



The supposed difference in the bracts is not evident. In fact, a close examination of 

 a series of collections indicates the same relative length of outer and inner bracts in 

 American and European material. As to the number of flowers, the figures just quoted 

 show a sufl[icient overlapping to suggest the doubtful value of this criterion and when a 

 large series is examined it is found that the distinction almost completely vanishes. 



Table 10. — Variation in the svbspecies of Artemisia dracunadv^. 



No. of 



involucral 



bracts. 



No. of 

 disk- 

 flowers. 



Total no. 

 of flowers. 



Length of 



corolla of 



disk-flowers. 



Subspecies typica: 



Great Falls, Mont 



Laramie, Wyo 



Gunnison Watershed, Colo. 



Washoe County, Nev 



Davis Ranch, Nev 



Palomar Mountains, Calif.. 

 Little Green Valley, Calif. . 



Atascadero, Calif 



Eel River, Calif 



Grants Pass, Greg 



Enterprise, Oreg 



Waitsburg, Wash 



Payette, Idaho 



Cafion County, Idaho 



Santa Barbara, Calif 



Sarepta (Europe) 



Somme, France 



Cultivated, Europe 



Liverpool, England 



Tibet 



Average . 



Subspecies glauca: 



Winona, Minn 



Hennepin County, Minn.. . . 



CafSon City, Colo 



Monticello, Utah 



Dofia Ana County, N. Mex. 

 Lincoln County, N. Mex.. . . 



Comanche Springs, Tex 



Chihuahua, Mex 



Klickitat County, Wash.. . . 



Brandon, Manitoba 



Leeds, N. Dak 



Siberia 



Average . 



Subspecies dracunculina: 



New Mexico 



Grand Cafion, Ariz 



Sierra Madre, Mex 



Chihuahua, Mex 



Do 



Cafion de San Diego, Mex. 



Average 



29745 UC 



51693 UC 



34508 UC 



175965 UC 



91256 UC 



65449 UC 



64995 UC 



205777 UC 



196572 UC 



CI 



170013 UC 



73885 UC 



205776 UC 



160228 UC 



NY 



549840 US 



200431 US 



NY 



NY 



Gr 



67845 UC 



29743 UC 



172710 UC 



176480 UC 



112378 UC 



135380 UC 



147505 UC 



135379 UC 



130207 UC 



(12257) NY 



Gr 



Gr 



NY 

 SF 



91224 UC 



91225 UC 

 29742 UC 



91226 UC 



9 11 

 8 14 

 8 10 



8 10 

 14 15 



9 11 



12 12 



10 13 



11 12 



10 14 



11 12 



10 12 



11 14 



13 15 

 11 13 



11 10 



12 11 

 12 11 

 10 11 



14 15 



11 



9 11 

 7 



7 10 



8 10 



6 8 



10 11 



8 9 



7 9 



9 10 

 12 12 



11 10 

 11 12 



9 



8 10 



7 8 



8 8 

 10 12 



8 10 



9 10 



8 13 



12 13 

 18 20 



8 13 



13 15 



9 11 

 9 11 



15 26 

 17 14 

 15 20 



21 26 



11 13 



12 26 

 17 16 



14 17 



15 13 



13 11 

 11 12 



9 12 



22 18 



16 16 

 14 15 



19 20 



14 15 

 18 10 



12 14 

 27 29 

 16 25 



13 20 

 9 15 



25 23 

 12 10 

 12 23 



15 16 



11 14 



12 14 



11 14 



13 12 



12 11 



20 17 



24 29 



26 28 

 37 40 

 22 28 

 31 25 



21 25 

 36 40 



31 51 

 30 34 

 24 35 

 46 49 



22 25 



24 49 



32 32 



25 31 



27 27 

 24 25 

 24 24 

 21 23 

 42 35 



14 



16 



30 



12 14 

 8 9 

 12 17 



8 9 

 10 10 



9 9 

 15 12 

 12 12 

 12 10 



8 10 

 11 



9 10 

 18 20 

 10 14 



12 20 

 10 11 



8 12 

 6 8 

 14 21 



13 16 

 13 12 



18 20 

 19 



17 19 

 30 34 



18 23 



24 37 

 18 20 

 18 22 

 15 17 

 29 33 



25 28 

 25 22 



22 



12 10 

 9 11 



14 14 

 8 10 



11 18 



12 15 



12 



16 12 

 9 16 

 6 7 



10 17 



10 12 



11 13 



11 



28 22 

 18 27 



20 21 

 18 27 



21 30 

 23 28 



23 



2.0 

 1.7 

 2.0 

 1.8 



1.7 

 1.7 

 1.6 

 1.8 

 1.7 

 1.8 

 1.6 

 1.7 

 2.2 

 2.0 

 2.0 

 2.0 



2.0 

 2.1 

 16 

 1.1 

 1.5 

 1.7 



1.8 

 1.6 

 2.0 

 1.8 

 1.6 

 1.7 



