Arhminia. COMPOSITjE. 373 



Var. Tilesii, Ledeb. Robust, leafy to the very summit : heads glomerate, fuscous : 

 involucre broadly- caiiipauulate, araclinoid-cottony wheu youug,but glabrate, many-flowered : 

 k-avcs ii.arM-ly cleft and huiuiate, the lobes lanceolate, attenuate-acute. — Fl. Koss. ii. 586. 

 .1. TiUsii. Le.leb. .Mem. Acad. Petrop. v. .jGs ; Lie-s. Abrot. 7U; Les.s. iu Linn. vi. 214; UC. 

 1. c. ; Torr. & Gray, 1. c — Arctic coast to Uualaska. (Adj. E. Asia.) 



- Var. Californica, Be^s. Le^s branched or simple-stemmed, with more naked pani- 

 cle : heads of var. Tii<sii or smaller, or at_ maturity sometimes oblong, glabrate. — Bess, in 

 Liun. XV. 91 (fouuded ou -i. inirynfolia, Less.); 'Xorr. & Gray, 1. c. ; Gray, Bot. Calif, 

 i. 40-1. ^1. heterophylla, Nutt. Trans. Am. Phil. Soc. vii. 400. A. Tili'sii, var. elatior, Torr. 

 & Gray, Fl. ii. 422. — Xorthern llocky Jlountains to Alaska, south to the coajit of California * 

 aud in the Sierra Nevada. 



A. franserioides, Greene. Habit of A. vulgaris, glabrous throughout, or minutely and 

 obscurely ciuereous-puberuleut : stem ratlier stout, 2 or 3 feet high: leaves comparatively 

 ample, green abo\e, pale and barely cinereous beneath ; lower bipinnately and upper simply 

 pinuately parted into lanceolate-oblong obtuse entire or 2-.3-cleft divisinns and lobes : heads 

 numerous, loosely racemose on the brauches of the leafy elongated panicle, 2 or 3 lines 

 broad: involucre greenish, ylalirous, low-hemispherical, 30-40-flo-ivered. — Bull. Torr. Club, 

 X. 42. A. disrnlnr, Torr. &, Gray in Pacif. R. Rep. ii. 12G ; Rothrock in A\'lieeler Rep. vi. 

 171), not Dougl. — Roubideau's Pass, Moiuitains of S. Colorado, (Jininiswi. Pinos Altos 

 Mountains, New Mexico, Greene. Mount Graham, Arizona, Eotliroch. 



^^. discolor, Dotgl. \ foot high, mostly slender, from a lignescent slender candex, glabrous 

 or glabrate except the lower face of the leaves : these white with close cottony tomentum 

 (which is rarely deciduous), 1-2-pinnately parted into narrow linear or lanceolate entire or 



— sparingly laciuiate di\ isions and lobes : heads glomerate in an interrupted .spiciform or vir- 

 gate panicle, 1 or 2 lines high : involucre liemi>pherical-campauulate, greenish aud scarious, 

 glabrous or soon becoming so, 20-30-flowered. — Dougl. in herb. Hook.; Bess. Suppl. &. 

 DC. i'rodr. vi. 109; Torr. & Gray, 1. c. ; Gray, Bot. Calif, i. 404. A. Ludodciana & A. 

 Mlchauxiana, Bess. Abrot. 38, 71, & in Hook. Fl. 1. c, not 2Sutt. — Mountains of Brit. 

 Cidumbia and Jlontana to Utah, Nevada, and the Sierra Nevada in California. 



Var. incompta. A stouter form, with coarser and less dissected leaves, having 

 mristlv broader (sometimes shorfc-oblong) lobes, or the upper entire. — .1. iiiro/ujtfa, Nutt. 

 Trans. .Vm. Phil. Soc. vii. 400. — Rocky Jlonutaius from ilontana and \\'yoming to Wash- 

 ington Terr., Ne\'ada, and the Sierra Nevada in California. 



^ = ^ Not tall, sometimes low. herbaceous or suffrutescent at base : leaves or their divisions 

 narrowly linear, simple, small : heads 1.5-2i)-tlowered, in a narrow thj-rsoid or spiciform panicle. 



A ■ Lindleyana, Bnss. ^V foot or two, rarely only a span high, sender, with thin fioccu- 

 lent tomentum soon deciduous, or persisting on the lower face o/ tlie mostly entire leaves 

 (these inch or less long, a line or much less wide, the lower occasionally with 2 or 3 small 

 lobes) : heads barelv 2 lines high, loosely spicate on the simple stem or paniculate branches 

 of the inflorescence : involucre sparingly pubescent or glabrate, pale fuscous — Abrot. 35, & 

 in H'lok. 1. c, described from herb. Liudl. A. pundia, Nutt. Trans. Am. Phil. Soc. 1. c. .399, 

 a dwarf state. — Samlv banks of the Columbia River and its tributaries, Idaho, Oregon, and 

 ■\Vashin5t0n Terr., Dotighi.<, yuttall. Hall (distrib. as .1. discolor ?), Brandeyee. Also on the 

 sands of the sea-shore near the Straits of Juan de Fuca, Douglas. 



A. "Wrightii, Gray. Cinereous or eanescont with minute pubescence, or radical shoots 

 sometimes white-tomentose, 10 to 20 Indies high, very leafy up to the strict virgate panicle : 

 leaves pinnatelv 5-7-parted into very narroiv linear and by revolution filiform entire divis- 

 ions : heads numerous aud crowded : involucre minutely cinereous-canescent, glabrate in 



acre. Proc. Am. Acad. xix. 48. — Plains of S Colorado and adjacent Xew itexico, Wright 



(no. 1279, PL TVri^ht. ii. 98, mention only). Palmer, Greene, Rothrock (no. 539), Brandegee. 

 __ ^ ^ = Pinnatelv parted leaves mostly attenuate-filiform: heads simph' and loosely race- 

 mose-spioate. 



A. Prescottiana, Bess. :Much branched from the base, a foot or two high, slender, gla- 

 brous or earlv glabrate . lower leaves cuneate-linear and incised or cleft at apex, slightly 

 tomentose beneath; nmst of the cauline pinnately parted into 5 to 7 delicate filiform divis- 

 ions (of an inch or less long) : involucre glabruus, hemispherical, about 1 .5-flowered. — Abrot. 

 72, & in Hook. 1. c. — " Quicksand River, near the Grand Rapids of the Columbia," Douglas. 



