36 Nelson : New Plants from Wyoming 



slightly recurved ; the involucral bract short, oblong-ovate : the 

 flowers (30-60), all fertil, the pistillate few, with exserted, recurved 

 styles, the hermaphodite with short, included, cleft style : the 

 stigmas truncate, penicillate : the corollas resinous dotted through- 

 out. 



This Artemisia does not seem to be closely allied to any of the 

 known Rocky Mountain species, but in some respects at least it is 

 allied to A. Ludoviciana Nutt. Its silvery-white aspect, numerous, 

 slender, erect stems, narrow leaf segments and many-flowered heads 

 are characteristic. Seemingly rare : only a few clumps of it ob- 

 served on the sandy beaches and banks of Yellowstone Lake. 

 Type number, 6612, Aug. 22, 18991 



Artemisia subglabra 



H 



ing, slender, more or less branched above,jvery obscurely glandular - 

 pruinose, otherwise green and glabrous as are also the leaves, 3-5 

 dm. high : leaves pinnate or bi-pinnate ; the segments linear or 

 sometimes broader, widely divaricate, the margins more or less 

 revolute : inflorescence racemiform or narrowly paniculate ; the 

 heads medium size (3-5 mm.), shortly pedicelled, spreading or 

 deflexed ; the involucral bracts green, oblong, with ciliate-lanate 

 margins: flowers 12-20, all fertile, the pistillate with flattened or 

 grooved spatulate styles. 



In general aspect somewhat suggesting A. dracunculoides but 

 wholly different in floral characters, in which it more- closely 

 approaches A. incompacta Nutt. It was secured on the stony 

 banks of Yellowstone River, near Yancey's, Yellowstone Park, 

 July 9, 1899, no. 5743. 



