CATALOGUE. jgj 
naked ; florets densely woolly, the 1-4 outer ones pistillate and fertile, liaving 
short truncate obscurely 2~3-toothed corollas, branches of the style exsciicd, 
smooth ; achenia oblong-obovate ; inner florets 4-8, perfect but sterile, ( (H-ollas 
inflated-funnel-form, 5-toothed, styles undivided, expanded and i-adiately 
penicillate at the summit. — Plant 4-18' high, very ])it1er lo llie Insic. ^^)l■1h 
sources of the Platte, (Nuttall;) Laramie plains, in alkali-flats, (1). C. K.) 
Abundant in the valleys of Nevada, and also collected on the islaiuls of Great 
Salt Lake; June. There is no good reason why this slionld not be an 
Artemisia, of the section Dracuncnlus ; the style of the sterile llorcis is pn^ - 
cisely that of A. horealis, caudata, etc., and the other diameters are nol dis- 
cordant with the genus. Plate XIX. Fig. 15. Abranfddcl; n;iliir;d si/c. 
Fig. 16. A leaf ; enlarged two diameters. Fig. 17. An iiivoliicral scale; 
enlarged four diameters. Fig. 18. An outer pisfillale fciiilc floret. Fig. 19. 
An inner perfect but sterile floret; each enlarged eiglit di;iine<ei-s. Fig. 20. 
A stamen. Fig. 2L The style of a perfect floret; each enlarged twelve 
diameters. (G33.) 
Artemisia dracunculoides, Pursh. Saskatchewan to California, and 
Texas; eastward to Illinois, Common throughout Nevada, mostly in the 
valleys and lower canons, and collected at the City of Rocks in Southeastern 
Idaho ; August-October. (634.) 
Artemisia filifolia, Torr. Stems 1-3° high, with slender virgate 
panicled branches ; leaves 1-2' long, whitish-tomentose, becoming smooth, 
filiform with revolute edges, the lower ones mostly 3-parted; heads in dense 
leafy panicles, very small, tomentose, 3— 5-flowered ; two florets pislilljitc and 
fertile, with short truncate corollas, tlie rest perfect but sterile, the corollas 
funnel-form, 5-toothed; styles as in A. sinnescPMs, etc. — Colorado and the 
plains of the Upper Platte, extending to New Mexico and Arizona. Green 
River, Utah, (Gunnison.) 
Artemisia tridentata, Nutt. Shrubby, 1-6° high, much-branched, 
branches spreading ; leaves crowded, cuneate-ol)long, 6-12" long, usually 
3-toothcd at the apex, the teeth short and obtuse ; those of ilic dense com- 
pound leafy panicles linear and entire ; all finely tomenlose-cancsccnt like the 
branchlets ; heads obovoid, o-G-flowcred ; outer involuci-al scales tojnentose, 
very short ; inner ones longer, scarious ; florets all perlect and fertile ; co- 
rollas funnel-form, 5-toothed, the proper tube veiy short ; styles 2-( left, the 
branches widened slightly upward, truncate and somew hat penicillate. — xV 
