Erigeron. COMPOSITE. 217 



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

 coarsely 3-5-toothed or incised ; cauline more entire, inch long : rays pale pnrple, quarter- 

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

 ing cliffs in Multnomah Co., Howell. 



.i~- ^— Raj-s very narrow, almost filiform, and numerous (much over 100) : disk only 3 or 4 lines 

 broud: stems scattered, erect, either from a biciaiial root or from a biennial or winter-annual 

 offset. 



E. Plliladelpllicus, L- Soft-liirsute, a foot or two liigh : stem striate-angled : leaves 

 oblong, or lowest spatulate or obovate ; upper cauline half-clasping, obtuse, sparingly and 

 coarsely serrate or entire : peduncles thickened under the head : rays pink, about 3 lines 

 long. — Spec. ii. 863; Willd. Spec. iii. 1957; Torr. & Gray, Fl. ii. 171, not Michx., Ell., &c. 

 E. piirpurcum. Ait. Kew. iii. 18G, DC. 1. c. E. pulchcUus, var., Hook. Fl. ii. 19 (N. W. Am.). — 

 Moist fields and border of woodhmds, Hudson's Bay to Florida, Texas, California, and Brit. 

 Columbia: fl. summer. 



E. quercifolius, Lam. Pubescent with short spreading hairs, sometimes cinereous, about 

 a foot higli : 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 bluish or 

 purplish to white. — 111. t. 681, f. 4; Poir. Diet. vii. 490; Reichenb. Ic. Exot. t. 134 (?); 

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



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



****** Perennial by rooting from decumbent or creeping leafy stems or stolons: rays 

 vcrv numerous and narrow: heads solitary, slcnder-pedunclcd. 



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 cuueate 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: pappus simple. — E. 

 scaposus, Torr. & Gray, Fl. ii. 170; Gray, PI. Lindh. i. 11, but hardly the Mexican E. scapo- 

 sns nor E. lomjipes, DC. E. scaposus, var.? cuneifulius, Gray, Proc. Am. Acad. xvi. 94. — 

 Sandy sea-coast, Texas, Bcrlandicr, Dnuninond, LinJhcimcr, Wr'njht, &c. (Probably also on 

 the Mexican side of the Rio Grande.) 



E. flagellaris, Grav. More or less cinereous with fine appressed pul)escence : stems .slen- 

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

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

 the branches passing to linear (from an inch to 3 lines long) : peduncles 2 to 5 inches long : 

 head barely 3 lines high : rays white or ])uri)lisli : pappus double, the outer subulate-setulose. 



— PI. Fendl. 69; Rothrock in Wheeler Rep. vi. 153. E. dirergms, Hook. Lond. Jour. Bot. 

 vi. 242. E. divergens, var.. Gray, PI. Wright. — Banks of streams, W. Texas and New 

 Mexico to Colorado and S. W. Utah ; also north to the U])per Platte; first coll. by Fcndler. 

 ******* Annuals or sometimes biennial-, leafy-stemmed and branching: Iieads con- 

 spicuously radiate, except in one species. 



-»— Akenes narrow, little compressed, with a broad and whitish truncate apex and a simple capil- 

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

 E. Belli diastrum, Kutt. A diffusely or loosely branched annual, a span or two high, 



cinereous-pul)escent : leaves entire, spatulate-linear or the lowest broader (an inch or less 



long): heads paniculate, short-pedunclcd : rays light purple. — Trans. Am. Phil. Soc. vii. 



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



Nebraska to New Mexico; first coll. by Nuttall. 



^_ ^_ Akenes compressed, 2-ncrved : pappus more or less double; outer short and subulate- 

 squamellate or sometimes coroniform; inner often fragile or deciduous. 



++ Leaves entire, sometimes dentate or lower incisely lobed, not dissected. — Phalacroloma, Torr. 

 & Gray, Fl. ii. 175. 



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

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

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



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



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



