176 COMPOSITtE. Erigeron. 



Bigel. Jl. Bost. ed. 2. p. 302. Aster annuus, Linn. ! liort. Cliff, p. 409, &■ 

 spec. 2. p. 875 ; Willd. enum. 2. p. 884. Bellis ramosa, &c. Cornut. Canad. 

 t. 194. Pulicaria annua, Gcertn. fr. 2. p. 462. Diplopappus dubius, Cass, 

 in hull, philom. 1817 Sf 1818. Stenactis dubia, Cass, in diet. sci. nat. 37. p. 

 485. S. annua, Nees, Ast. p. 273. S. annua & S. strigosa (excl. syn.), DC ! 

 prodr. 5. p. 299. Phalacroloma acutifolium, Cass, in diet. I. c. 39. p. 405. 

 Fields and waste places, Canada ! and throughout the Northern States ! 

 to Kentucky ! a common weed; now naturalized throughout Europe. May 

 or June-Aug.— (|) or (l) 1 Stem stout, 2-4 feet high, striate or angled. 

 Radical andlower leaves large. Heads as large or larger than E. strigosum, 

 but less showy ; the ray (white or tinged with purple) being shorter.— i^im- 

 hane, Daisy. — Nuttall says the ray has no pappus ; and Nees, that it is very- 

 deciduous. We find the exterior squamellate-coroniform pappus, but no 

 trace of an interior : both the pappus and the achenia entirely correspond 

 with the following species ; and, indeed, specimens almost intermediate be- 

 tween the two may sometimes be observed. 



28. E. strigosum (Muhl.) : more or less strigose with a minute appressed 

 pubescence ; stem slender, paniculate-corymbose at the summit ; leaves all 

 entire or slightly serrate ; the radical and lower cauline oval or spatulate, 

 3-nerved, tapering into a slender petiole ; the upper ones scattered, lanceo- 

 late, oblanceolate, or linear, acute or obtuse ; rays narrowly linear, about 

 twice the length of the minutely hispid or pubescent involucre. — Muhl. ! in 

 Willd. spec. 3. p. 1956 ,• Ell. sic. 2. p. 394 ; Hook. ! ft. Bor.-Am. 2. p. 18 ; 

 Darlingt. jl. Cest. p. 471. E. ambiguum, Nutt. ! gen. 2. p. 147. E. lon- 

 gifolium, Hort. Par., ex Cass., not of Lam. E. nervosum, Pursh, I. c, not 

 of Willd. E. spathulatum, H. H. Eaton, in trans, mcd. soc. New York, 

 1822. E. Philadelphicum, Bart. veg. mat. med. t. 20. Doronicum ramo- 

 sum, Walt. Car. p. 205. Phalacroloma obtusifolium, Cass, in diet. I. c. ; 

 DC. prodr. 5. p. 298, excl. all the syn. Stenactis ambigua, DC! prodr. 

 5., p. 299. 



(3. stem and leaves nearly glabrous ; the latter almost constantly entire, 

 except the lowest. — E. integrifoHum, Bigel. fl. Bost. ed. 2. p. 302. 



y. slender; heads rather smaller; rays rose-color, turning nearly white. 

 — E. Beyrichii, Hort. Berol. ! Stenactis Beyrichii, Fisch. S^- Meyer, 5th 

 ind. sem. St. Petersb. Phalacroloma Beyrichii, i^isc/i. 4* -^%^''- Gth ind. 

 sem. I. c, &; in Linneea, 14. suppl. p. 162. (Carolina, Beyrich. v. sp. in 

 hort. Berol.) 



Fields and open places, Canada! and from the Saskatchawan ! to Florida! 

 and Louisiana! and west to Oregon ! .Tune-Aug., or in the Southern States, 

 April-June. — (T) or @ ? Stem 1-3 feet high, usually much smaller and 

 more slender than the preceding, angled or furrowed. Corymbs loose, at 

 length rather naked. Rays while ; the tube hairy. Achenia slightly hairy. 

 Inner pappus in the disk, of about 15 slender fragile and deciduous bristles ; 

 in the ray none, or sometimes of one or two caducous bristles : the exterior 

 a small setaceous-squamellate crown, similar in the ray and disk.— The 

 plant infests cultivated fields and meadows, like the preceding, and is also 

 called Flea-bane and Daisy. 



§ 5. Rays in a single series, rather few {about 30), longer than the invo- 

 lucre : pappus simple : achenia mostly A-nerved : perennial, scapiform. — 

 Erigeridium. 



29. E.vernum: nearly glabrous ; radical leaves rosulate, slightly succu- 

 lent, spatulate or oval, mostly petioled, obscurely toothed or entire; the 

 cauline very few and small, or none ; heads several (5-12), small, paniculate- 

 cymose ; rays narrowly spatulate-linear ; scales of the involucre lanceolate, 

 with scarious margins, slightly pubescent. — E. nudicaule, Michx. ! Jl. 2. p. 



