Artemisia. COMPOSITiE. 395 



^2. Abrotanttm, Tourn. Receptacle naJied {not hairy) : heads heterogamous ; the flotcers all fertile. 

 3. Artemisia vulgaris, Linn. Mw^ivort. 



Perennial, erect ; leaves whitish-tomentose underneath ; the cauline pinnatifid, with the 

 lobes either laciniate, incised, coarsely serrate, or entire ; the uppermost nearly linear and 

 entire ; heads spicats-paniculate, ovoid, nodding, at length erect ; the panicle leafy and 

 spreading ; exterior scales of the involucre canescently tomentose, the inner scarious ; corolla 

 smooth {Bess, in Hook. jl. Bor.-Am. 1. p. 322). — Linn. sp. 2. p. 848 ; Engl. hot. t 978 • 

 Miclix. Jl. 2. p. 128 ; Pursli, fl. 2. p. 522 ; Nutt. gen. 2. p. 144 ; DC. prodr. 6. p' 112 • 

 Torr. 4- Gr. fl. N. Am. 2. p. 421. A. heterophylla, Nutt. in trans. Amer. phil. sac (n s ) 

 7.^.400. ^ ^ ' '' 



var. vulgatissima : lobes of the leaves linear-lanceolate, the lower scarcely incisely toothed ; 

 panicle ample, erect. Bess. I. c. ; Torr. ^ Gr. I. c. 



Stem 2-3 feet high, suffruticose, much branched, furrowed. Leaves 2-4 inches lono- 

 and 1 - 2 inches broad ; the lobes coarsely incised and acute, green above, clothed with dense 

 white wool underneath. Heads sessile. Scales of the involucre woolly. 



Old fields, road sides and waste places ; northern and western parts of the State ; natural- 

 ized in many places. September - October. This plant, though bitter, is eaten 'by cattle 

 and sheep, and is said to be used in Sweden as a substitute for hops in the preparation of beer. 



Subtnbe V. Gnapiialie.e, Less. Heads Iwmogamous or heterogamous, discoid; thefloiuers 

 all tubular ; the pistillate mostly fertile. Anthers caudate at the base. Style in the 

 perfect flowers with the branches not appendiculate ; in the staminate mostly undivided. 

 Pappus composed of capillary or setaceous bristles, or sometimes none. — Leaves mostly 

 alternate. 



CONSPECTUS OF THE GENERA. 

 * Receptacle not chaffy. 



35. GNAPnALiCM. Heads heterogamous ; the central flowers perfect, the marginal filiform. Pappus all capillary. 



36. A.VTENN1BU. Heads dioecious. Pappus of the sterile flowers clavatc or thickened at the apex. 



"* Receptacle chaffy, except in the centre. 



37. FiLAoo. Heads heterogamous ; the exterior flowers pistillate, filiform, subtended by the chaff of the receptacle, 



without a pappus ; the central flowers with a pappus. 



35. GNAPHALIUM. Linn. ; Endl. gen. 2767. CUDWEED. 



[ From Iho Greek, gnaphalan, soft down or wool, with which most of the species arc clothed.] 

 Heads many-flowered, heterogamous ; the flowers all tubular ; the exterior pistillate, very 

 slender, mostly in several scries ; the central perfect. Scales of the involucre imbricated, 

 apprcssed, scarious or somewhat hyaline. Receptacle flat, naked. Style 2-cIcft. Achenia 



50" 



