oy(j CUMPOSIT^E. Ihhia. 



coi-ulliis willi II iiiirrow but iioiiimoiily rutliev Hlutrt iind glaiululiir or liirsulu i)V()|>cr 

 tubo. AnUu'ia tipiH'tl witli tin oviito apiKMidugo. 8lylo-bmii(;bus willi truncuU)- 

 cui>ittito or obtuso tip, sometimes witb a short subulate-conical apiKUulago. Akeucs 

 narrow, linear or oblouj^-linear and tapering to the base, 4-angled, the i)\dtescenco 

 minute or none; the terminal areola large. Pappus of several (4 to 12) blunt and 

 nerveless scarious scales (in true JJahia often callous-thickened next the base), 

 rarely obsolete or wanting. — W. North American with a few Mexican and extra- 

 tropical S. American plants, perennials, with perhaps a single exception ; with oppo- 

 site or all but the lower alternate entire or divided leaves, aud mostly peduncled 

 heads of yellow flowers. — Benth. & Hook. Gen. PL ii. 402. 



Altliougli the tyiiical section is leiivcscnteJ eastward of California, all our specic^s are of tlie 

 two following sections ; the lirst s[)eeies, howevei', approaches Bahiu proper ; the last section con- 

 nects with Mwiuto/zia. 



§ 1. Ferennial, sometimes ahruhhy at base, Jfoccose-tvoolit/ or cottony: leaves mainly 

 alternate and vuistly either jnnnately or teruately jxirted or lohed : scales of 

 the cavipauidate or obovoid involucre erect, commonly a little united at base, 

 oval or oblan;/, more or less carinately one-nerved : throat or limb of disk- 

 coroUa rather narrow: style branches truncate, or rarely minutely tipped: 

 scales of the pappus wholly nerveless. — Euu)l'llYLLUM, (Jray. (Kriojihyllum, 

 Lagasca. TrichophyUum, Nutt.) 



« Heads corymbose or cymose, small, short-pedicelled, with only i to 8 short rays : the 

 wool close and cottony : stems tvoody at base, leafy to the top : leaves alternate. 



1. B. artemisieefolia, Less. Two to four feet high, loosely branching, whitened 

 when young with a coat of close cottony avooI, which is mostly nearly deciduous 

 with age, excei)t from the lower surface of the once or twice pinnatitid leaves ; their 

 lobes few, linear, obtuse, witli revoluto nuirgins : heads numerous in irn^gular pa- 

 niculate cymes : involucre cylindraceous-campanulate, slightly if at all woolly ; its 

 scales 8 to 10, oblanccolate or narrowly oblong : receptacle convex, strongly alveo- 

 late and to(»thed : scales of the i)ai)pus 8 to 12, oblong-linear, the four answering to 

 the i)rinciind angles or nerves of the akene rather longer. — Jl stachadifolia & var. 

 Californica, DC, a stunted foim, Avith leaves less lobed, or the ujjpermost, as often 

 liappens, entire. 



TJocks and hlulls, coninion from tiiu Hay of San Francisco to Santa l^urhara. Decidedly 

 Hhruliliy. Leaves Hunn^whut lik(^ liiose of Artanisiu vidijuris. lieadn 8 or i lines long : Hcales 

 of the'invohicru distinct to the hast; or nearly so, hocouiing concave at maturity. Kays (5 to 8. 

 If this is the Kriojthrilhtiii sttvchadi/ulium of Lagasca, that speciUc name has j)riority ; hut 

 the leaves of that are (hy implication) entire, and it may be an unrecognized species from Mexico, 

 as stated. 



2. B. confertiflora, DC, A foot or two high, white with a coat of close wool, 

 which is somewhat deciduous with age : branches erect and commonly fastigiate, 

 slender, naked at sunnnit and terminated by a small and dense few- to many- 

 llowered corymbose cyme : leaves small, of cuneato outline, pinnately A - 7- parted 

 (rarely 3-parted) into narrow linear lobcts : involucre obovoid or narrow cumiianulate ; 

 its scales about 5, broadly oval : receptacle convex or low conical in tlie centre, not 

 alveolate: scales of the pappus 8 to 14, oblong-linear, somewhat nniH"iual. 



Var. trifida, Gray (U. tri/ida, Nutt.), seems to be merely a form growing in 

 more exposed stations ; with the leaves mostly sessile or tapering into a broadly 

 margined petiole, and 3- 5-cleft at the apex into shorter lobes. 



Hillsides, &c., from the Bay of San Francisco to the Sierra Nevada and south to San Diego. 

 Shruhby at base, the llowering shoots mainly herbaceous. Involucre 'I lines long. Flowers 

 deep golden yellow : rays 4 or 5, broadly oval or orbicular. 



