37i COMPOSITE. Artemisia. 



Described by Besser from herb. Lindl., here from herb. Hook. A peculiar and little known 

 species, to which Douglas had applied the aiipropriate^name of A. leptophi/Ua. 



-H- ■^+ HH- -H- ++ Heads small and narrow, very few-flowered : flowers glabrous : stems woody 

 at base: habit of the following section. 



A ■ Bigelovii, Gray. Silvery-canescent throughout, a foot high: leaves from oblong- to 

 linear-cuneate, mostly 3-toothed at the truncate apex, about half-inch long: heads very 

 numerous and crowded in the oblong or virgate thyrsiform panicle, tomeutose-cauescent, 

 containing only one or two hermaphrodite and as many female flowers, all fertile. — Pacif. 

 E. Rep. iv. no. — Eocky banks and canons, Colorado, on the Upper Canadian and Arkansas, 

 common where the latter leaves the mountains ; first coll. by Bigelow. 



§ .3. Seriphidium, Bess. Heads liomogamous, the flowers all hermaphrodite 

 and fertile : receptacle not hairy. — Graj', Proc. Am. Acad. xix. 49. 



# Anomalous species of Southwestern border, tall, mainly herbaceous, 3 to 5 feet high, with ample 

 and naked compound panicles; the heads nodding in anthesis, as is common in tlie genus. 



A.. Parishii, Gray. Frutescent, ciuereous-puberulent : leaves linear and entire, below pass- 

 ing into elongated sleuder-spatulate and with 3-toothed apex : panicle a foot or two long, 

 loose: heads mostly pedicellate (2 lines long): involucre oblong-campanulate, canescent, 

 6-7 -flowered : akenes sparsely arachnoid-villous ! — Proc. Am. Acad. xvii. 220. — Interior 

 of Los Angeles Co., California, Parish. 



A. Palmeri, Gray. Wholly or nearly herbaceous, obscurely puberulent; but leaves white 

 beneath with close cottony tomentum, pinnately 3-5-parted into long narrowly linear entire 

 lobes, their margins revolute : heads glomerate on the branches of the open panicle, hemi- 

 spherical, less than 2 lines in diameter : involucre greenish, about 20-fliowered ; many of the 

 flowers subtended by scarious-hyaliue bracts of the receptacle ! — Proc. Am. .Vcad. xi. 79, & 

 Bot. Calif, i. 618. — Jamul Valley, 20 miles south of San j:)iego, on the borders of California 

 and Lower California, Palmer, Miss Bird. 



* # S.VGE-BEUSH or Sage-bushes, low shrubs, or fruticulose, canescent or silvery with very fine 

 and close tomentum : heads glomerate or st]-ict in the paniculate or spicifoi-m inflorescence, not 

 nodding even when young: corollas sometimes turning reddish. 



-)— FoKose-spicate : heads solitary in the axils, surpassed by the rigid leaves. 

 - A. rigida, Gray, a span to a foot high from a thick woody base or short stem, producino- 

 a profusion of rigid and slender rather simple fastigiate branches, leafy to the very top : 

 leaves also rigid, silvery-canescent, filiform-linear, 3-5-parted or cleft, or some of the "upper 

 and fascicled ones entire (even the lower rarely inch long), most of them subtending a sessile 

 head: involucre oblong to campauulate, 5-12-flowered, less than 2 Hues long; bracts oval, 

 hyaline-margined. — Proc. Am. Acad. xix. 49. J . trijida, var. rigida, Xutt. Trans. Am. Pliil! 

 Soc. vii. 398. — On high rocky ridges, N. E. Oregon and adjacent Idaho, Xuttall (without 

 flowers), Cusick. 



-1- -I- More naked-paniculate or thyrsoid, at least the upper heads or clustere exceeding the sub- 

 tending leaves ; these not rigid. 



++ Heads comparatively small and few-flowered, mostly oblong, one or two lines long: involncral 

 bracts rather flrm in texture, well imbricated, tlie outer successively shorter: leaves seldom over 

 an inch long, mostly shorter. 



• A. arbliscula, Nutt. Dwarf, a span or rarely a foot high, with a stout base and slender 

 flowering branches : leaves short, cuneate or flabelliform, 3-lobed or parted, with the lobes 

 obovate to spatulate-linear, sometimes again 2-lobed ; those subtending tjie heads usually en- 

 tire and narrow: panicle strict and comparatively simple and naked, often spiciform" and 

 reduced to few rather scattered sessile heads : involucre 5-9-flowercd. — Trans. Am. Phil Soc 

 1. c; Torr. & Gray, PI. ii. 418; Eaton, Bot. King Exp. 182; Grav, Bot. Calif, i. 405 — 

 High mountains and elcvnted arid plains, Wyoming and Ut:ili to Idaho and the Sierra 

 Kcvada, California. Two forms, passing into ciich other (both coll. Ijv XiiUall, &c.); one 

 with involucre more campanul.ate, 7-9-flo^^•prell ; in the other oblong ancl only 4-5-flowered; 

 sometimes the inflorescence simply spiciform, sometimes freely naked-paniculate. 

 A. tridentata, Nott. 1. c. Larger, 1 to C, (nr even 12) feet high, much branched : leaves 

 cuneate, obtusely 3-toothed or 3-lobed, or even 4-7-toothed, at the truncate, summit, upper- 



