66 GENUS ARTEMISIA. 



as shown in the plates. Their occupation of the same general region (both grow around 

 Kotzebue Bay), without any evident tendency towards intergradation, also indicates 

 that they are not directly connected, although undoubtedly of the norvegica-macrobotrys- 

 laciniata stock. 



ECOLOGY AND USES. 

 Artemisia senjavinensis is a dwarf mat-former produced by extreme Arctic conditions, 

 as indicated by the short branches and coating of long hairs. No uses are known for it. 



7. ARTEMISIA PARRYI Gray, Proc. Am. Acad. 7:361, 1868. Plate 4. 



A perennial herb with a rootstock, 1 to 4 dm. high, probably without strong odor; 

 stems usually in groups, simple below, erect, glabrous, faintly striate, seldom if ever 

 reddish tinged; basal and lower leaves much crowded, petioled, 4 to 8 cm. long including 

 petiole, twice pinnately divided into linear elongated lobes, the divisions either widely 

 spreading or ascending, sparingly pilose especially on the back or glabrous; upper leaves 

 smaller and less dissected but with similar elongated linear lobes and similar pubescence ; 

 inflorescence an elongated terminal raceme or branching and subpaniculate, 10 to 30 cm. 

 long, 0.5 to 5 cm. broad, when compound the branches ascending; heads heterogamous, 

 peduncled (peduncles 1 to 5 mm. long), mostly nodding; involucre hemispheric, 3 mm. 

 high, 4 to 5 mm. broad; bracts 14 to 18, elliptic, obtuse, brown and scarious on the 

 margins, glabrous or rarely a little villous; ray-flowers about 8, fertile, corolla tapering 

 upwards, about 1.5 mm. long, pubescent or glabrous; disk-flowers about 30 to 50, fertile, 

 corolla funnelform, about 2 mm. long, 5-toothed, pubescent or glabrous; style-branches 

 of ray-flowers acutish, of disk-flowers truncate or rounded and erose at summit; achenes 

 nearly cylindric but narrowed below, truncate or slightly rounded at summit, faintly 

 4- or 5-ribbed, smooth or granuliferous. 



Known only from the high mountains of southern Colorado and southeastern Utah. 

 Type locality, Huerfano Mountains, Colorado (erroneously stated by Gray to be in 

 New Mexico). Collections: Type, September, 1867, Parry (Gr); Colorado: Sangre 

 de Cristo Pass, 1867, Parry (Gr) ; Crestones, Sangre de Cristo Mountains, at 3,700 m. 

 altitude, Brandegee (Gr, UC 173290, very similar to the type); Cottonwood Lake, 

 Shear 3802 (NY) ; La Sal Mountains, near Mount Peal, southeastern Utah, Rydberg and 

 Garrett 9003 (NY). 



SYNONYMS. 



1. Artemisia saxicola parryi Nelson; Coulter and Nelson, Man. Rocky Mt. 568, 1909. — Based upon 

 A. parryi Gray. 



RELATIONSHIPS. 



It is difficult to determine the exact position of this species in the phylogenetic scheme 

 of the Artemisias. This is due to its scarcity, its local distribution, and the absence of 

 variations. It is very certain, however, that it belongs to the group of macrobotrys 

 and norvegica, and although not heretofore associated taxonomically with the former, 

 it seems to be a far southern representative of that Siberian and Alaskan species. The 

 heads and flowers are smaller than in macrobotrys, but aside from this and a certain 

 leaf-character there are no essential differences. The principal reason for associating 

 these two is that both exhibit a unique divergence of the primary divisions of the leaf. 

 In macrobotrys the divisions, at least of the lower leaves, stand at about a right angle to 

 the rachis. An equally great divergence occurs in some specimens of parryi, for example, 

 Brandegee's plant from Crestones, Colorado (Univ. Calif. Herb. 173290), while in others 

 the divisions are directed forward. In shape, the segments are quite different. Those 

 of macrobotrys are lanceolate and very acute, while those of the present species are 



