Erigeron. COMPOSIT.E. 217 



small heads : leaves spartlate, or the radical cuneate-obovate ; these an inch or two long, 

 coarsely 3-5-tootlied or incised ; cauline more entire, inch lon;^ : rays [jale purple, quarter- 

 inch long. — Proc. Am. Acad. xix. 2. — Oregon, along the Columbia River under overhang- 

 ing cliffs in ilultnomah Co., Iloa-t-ll. 



•<— -i— Ka}s very narrow, almo^t filiform, and nunievou.s (much over 100) : disk only 3 or 4 lines 

 broad: ^tenl^ scattered, erect, either from a bier.nial root or from a biennial or winter-annual 

 ofiVet. 



•■E. Philadelphicus, L. S.jft-hirsute, a foot or two high: stem striate-anjrled : leaves 

 obhing, or lowest ,patulate or obovate; upper cauline half-clasping, obtuse, sparin L'1 v and 

 coarsely serrate or entire : peduncles thir-kened under the head : ravs pink, about 3 lines 

 long. — Spec. ii. 863; 'WiUd. Sper. iU. l<j.57 ; Torr. & Gray, Fl. ii. 171, not Michx., ED., &c. 

 E. purpureum. Ait. Kew. iii. 1,S6, IJ! '. 1. c. E. pnhheUus, rav., Hook. Fl.ii.19 (X. W.Am.). — 

 il"i.~t fields and border of woodlands, Hudson's Bay to Florida, Texas, California, and Brit. 

 Columbia : fl. .-rummer. 



■ E. quercifolius, L.\m. Pubescent with short spreading hairs, sometimes cinereous, about 



a foot liigli : radical and lowest cauline leaves obovate or spatulate, from repand to sinuate- 

 pinnatifid : heads smaller than in the preceding: rays barely 2 lines long, from blui.-h or 

 purpli-sh to white. — 111. t. 681, f. 4; Poir. Diet. vii. 490; Eeicheub. Ic. Exot. t 1.'34 {"!]; 

 Torr. & Gray, 1. c. E. Philadelphicus, :Michx. Fl. ii. 123 ; Ell. Sk. ii. 396 ; DC. 1. c, not L. 



— Low grounds, S. Carolina to Florida and Texas; fl. spring. 



****** Perennial b}' rooting from decumbent or creeping leafy stems or stolons : rays 

 very numerous and narrow: heads solitary-, slendtr-peduncled. 



■ E. repens. Cinereous-pubescent: stems prostrate or ascending from the slender root; pros- 



trate ones rooting at the nodes : leaves obovate or broadly spatulate with cuneate base taper- 

 ing into a petiole, obtusely and deeply .5-9-toothed or almost lobed : peduncles scapiform, 

 4 to 8 inches long: involucre 4 lines high: rays 3 lines long, white : pajijjus simple. — E. 

 scaposus, Torr. & Gray, Fl. ii. 170; (jray, PI. Lindli. i. 11, but hardly the Mexican E. scapio- 

 sus nor E. longipes, DC. E. scoposns, var. ? cunc-ijblias, Gray, Proc. Am. ^Vcad. xvi. 94. — 

 Sandy sea-coast, Texas, Burlandier, Drummond, Lindheimer, Wright, &c. (Probably also on 

 the ilexican side of the Piio Grande.) 

 - B. flagellaris, Gray. ^lore or less cinereous with fine appressed pubescence : stems slen- 

 der, diffusely decumbent and flagelliform but leafy, some prostrate, many at length rooting 

 at the apex and proliferous: leaves small, entire; radical spatulate and petioled; those of 

 the branches pa.ssii]g to linear (from an inch to 3 lines long) : peduncles 2 to 5 inches long : 

 head barely 3 lines high : rays white or pur])]ish : papptis double, the outer subulate-setulose. 



— PI. I'endl. 69; Eothrock in Wheeler Rep. vi. 1.53. E. divergens, Hook. Loud. Jour. Bot. 

 vi. 242. E. diverr/ens, var.. Gray, PI. Wright. — Banks of streams, W. Texas and Xew 

 Mexico to Colorado and S. W. ITtah ; also north to the Upper Platte; first coll. by Eendler. 



******* Annuals or sometimes biennials, leafy-=temmed and branching: heads con- 

 spicuously radiate, except in one -pedes. 



■y- Akenes nan-ow, little compressed, with a broad and whitish truncate apex and a simple capil- 

 lary pappus: heads small (only 3 lines high) : rays 40 to 70, not very narrow. 

 E. Bellidiastrum, Xutt. a diffusely or loosely branched annual, a -pan or two high, 



cinereous-pubescent : leaves entire, spatulate-linear or the lowest bmader (an inch or less 



long): heads panicukte, short-peduncled : rays light purple. — Trans. Am. Phil. Soe. vii. 



307; Torr. & Gray, Fl. ii. 170; Gray, Proc. Am. Acad. viii. 648. — Low grounds, plains of 



Nebraska to Xew ilexico ; first coll. by Snttall. 



H— -1— Akenes compressed. 2-nerved: pappus more or less double; outer short and subulate- 

 squamellate or sometimes coroniform ; inner often fragile or deciduous. 



•H- Leaves entire, sometimes dentate or lower incisely lobed, not dissected. — Phalacroloma, Torr. 

 & Gray, Fl. ii. 17.5. 



^= Rays of the middle-sized or rather large heads numtrous, well exserted, and with pappus like 

 the disk-flowers : leaves all entire : Southwestern species. 

 B. Rlisbyi. Hirsute-pubescent or hispidulors, but green: stems a foot high from probably 



annual or biennial root, sparingly branched, somewhat diffuse or spreading, equably leafy : 



cauHue leaves oblong-lanceolate, acute, closely sessile by a broad base, about an inch long; 



