COMPOSITE. 125 



the outer of short and rigid bristles. Rays white. Stem 

 smooth, leafy to the top, tall, simple. Leaves lanceolate, 

 long-pointed. Heads small, very numerous, in compound 

 flat corymbs. Moist thickets. 



28. ERIG'ERON, L. FLEABANE. 



1. E. Canaden'sis, L. (HORSE -WEED. BUTTER -WEED.) 

 Rays white, but very inconspicuous, shorter than their tubes. 

 Heads very small, numerous, in panicled racemes. Stem 

 1-5 feet high, erect and wand-like, bristly-hairy. Leaves 

 linear, mostly entire. Common in burnt woods and new 

 clearings. 



2. E. aeris, L. Kays purplish or bluish, about the same 

 length as the copious simple pappus. Heads several or 

 many, small, at length corymbose, hirsute. Stem 10-20 

 inches high, pubescent or smoothish. Leaves mostly lance- 

 olate, entire. A set of pistillate flowers within the circle of 

 ray-flowers, Atl. Prov. and N. W. 



3. E. bellidifO'lius, Muhl. (ROBIN'S PLANTAIN.) Rays 

 bluish-pur pie , numerous. Heads medium-sized, few, on 

 slender corymbose peduncles. Stem hairy, producing offsets 

 from the base. Radical leaves spathulate or obovate, toothed 

 above the middle ; stem-leaves oblong, few, sessile or partly 

 clasping, entire. Thickets. 



4. E. hyssopifo'lius, Michx. Rays rose-purple or whitish. 

 Stem slightly pubescent, slender, 6-12 inches high, from 

 slender rootstocks. Leaves very many, short, linear. Heads 

 small, terminating the slender naked branches. Pappus 

 simple. Atl. sea-coast and northward. 



5. E. CSBSpitO'SUS, Nutt. Stem dwarf, tufted, from a 

 stout rootstock, more or less hoary-pubescent. Rays white, 

 40-50, narrow. N. W. ' 



6. E. Philadel'phieus, L. (COMMON FLEABANE). Rays 

 rose-purple, very numerous and narrow. Heads small, few, 

 in corymbs. Stem hairy, with numerous stem-leaves. 

 Radical leaves spathulate and toothed ; the upper ones 

 clasping by a heart-shaped base, entire. Moist grounds. 



