A.TWOWM] SYNGENESIA 471 



Ilab. Woodlands, and clearings: frequent. Fl. July— Sept. Fr. Sept— Octo. 

 Obs. There is one other species in the U. States. 



377. ERIGERON. L. Mitt. Gen. 657. 

 rGrcek, Er, spring, and Geron, an old man ; the plant being hoary in the spring.] 



Heads manv-flowercd. Involucre imbricated, the leaflets narrow. 

 Florets of the ray in several series, numerous, very narrow. Pappus 

 mostly simple. Receptacle naked, punctate. 



I E. canadensis, L. Stem hirsute, paniculate ; leaves lance-linear, 

 mostly entire, ciliate ; heads of flowers small, numerous, racemose on 

 the branches; rays minute. Beck, Bot. p. 180. 

 Canadian Erioehok, Vulgo — Horse-weed. Buttcr-wecd. 



Root annual. Stem 6 inches to 5 or G feet high] sulcate-striatc, very hairy, much 

 broached above. Leaves 1 to 3 or 4 inched long, and 1 line to near half an inch 

 wide, lance-linear, acute, tapering at base, sessile, hirsute and ciliate, the lower 

 ones Sparingly dentate. Heads of flowers small, numerous, loosely racemose on 

 the branches, forming an oblong panicle ; branches and pedicels hirsute, slender, 

 with subulate-linear leaves or bracts at base; leaflets of the involucre narrow, 

 lance-linear, acute, membranaceous on the margin, somewhat pilose and ciliate , 

 rays white, capillary, scarcely longer than the pappus. Akenes oblong, sprinkled 

 with short hairs, whitish; pappus simple, pilose, the hairs numerous, scabrous, 

 pale straw-color. 

 Ilab. Fields, roadsides, &c. common. Fl. August— Sept. Fr. Sept— Octo. 



Obs. A common weed, and very variable in size. The E. pusillus, of Xuttall, 

 is perhaps scarcely more than a variety. 



2. E. strigosus, JMuhL Stem hairy, corymbose-paniculate; leaves 

 lanceolate, attenuate at base, dentate, or entire, the radical ones spatu- 

 late-lanceolate ; rays spreading, scarcely twice as long as the involucre. 

 Beck, Bot. p. 180, 



Also? E. integrifolium. BigeL Bost. p. 302. Torr. Comp. p. 289. 



Beck, Bot. p. 179. Eat. Man. p. 135. 



Also ? E. nervosum. Pursh, Am. 2. p. 534. Eat. I. c. Not of 



mud. 



SrHiGosE Erigerox. Vulgo— Flea-banc. Daisy. 



Root biennial ? Stem 2 to 3 or 4 feet high, angular and sulcate-striate, more or 

 le89 hairy, corymbosely branching above, sometimes simple, or with a small co- 

 rymb at summit. Leaves 1 to 3 inches long, and I eighth to 3 fourths of an inch 

 wide, more or less pubescent, — the radical and lower ones somewhat spatulate- 

 lanceolate, sparingly dentate, 3-nerved, attenuate at base to a margined petiole 

 nearly as long as the leaf,— the sterrUeaves varying from lanceolate to oblong and 

 lance-linear, acute, sparingly dentate, or entire, often 3-nerved, somewhat ciliate, 

 sessile. Heads of flowers rather small, in terminal corymbs at the summit of 

 the branches; leaflets of the involucre lance-linear, acute, minutely pubescent; 

 rays white, narrow, sub-linear. Akenes oblong, angular, or ribbed, sparsely 

 pilose ; pappus while, the hairs few, brittle. 



Hub. Pastures, and upland meadows: common. Fl. June— Au<?. Fr. July— Sept. 



Obe. This is also a very common, and worthless weed,— especially in the first 



crop of our upland meadow*, after a course of grain crops. We have what ap- 



