208a. Leaves obovate to oblong (3 10 dm. high) 135a. 

 208b. Leaves linear or narrowly lanceolate (225 dm. high) 



Horse Weed, Erigeron canadensis. 

 209a. Pappus none, or minute and not of hairs (summer and autumn) 



210. 

 209b. Pappus of hairs 214. 



210a. Disk-flowers purple or brown (4 12 dm. high; rays pink) 



(Purple Coneflower) 211. 

 210b. Disk-flowers yellow or nearly white 212. 



211a. Leaves ovate or ovate-lanceolate, most of them serrate 



Purple Coneflower, Brauneria purpurea. 



211b. Leaves narrowly lanceolate, gradually narrowed at the base, 

 entire Purple Coneflower, Brauneria pallida. 



212a. Rays broadly obovate; heads 1 \ cm. wide (3 6 dm. 

 high) Sneezewort, Achillea ptarmica. 



212b. Rays oblong or narrowly elliptical 213. 

 213a. Leaves serrate (3 10 dm. high) 



Ox-eye Daisy, Chrysanthemum leucantliemum var. pinnatifiduin. 

 213b. Leaves entire (8 25 dm. high) Boltonia, Boltonia asteroides. 



214a. Involucral bracts all the same length or nearly so and 

 narrow, or with a few short outer ones; plants blooming in 

 spring and summer, or a few plants persisting in bloom until 

 autumn (Fleabane) 215. 



214b. Involucral bracts unequal, the outer successively shorter 

 (or rarely nearly equal), loo'sely or closely overlapping; plants 

 3 15 dm. high, blooming in late summer and autumn (Aster) 

 221. 



215a. Rays short and inconspicuous, barely longer than the pappus 

 (15 dm. high; summer) 



Fleabane, Erigeron acris yar. asteroides. 

 215b. Rays conspicuous, spreading, 3 mm. long or more 216. 



216a. Rare plants of the Northern Peninsula, with entire leaves 

 and stems 1 5 dm. high, from a thick woody root (flowers 

 white -or purple, summer) 217. 

 216b. Common species, with erect stems from fibrous roots; 



leaves toothed (except in one species) 218. 

 217a. Heads 3 5 cm. wide; rays about 100 



Fleabane, Erigeron glabellus. 

 217b. Heads 12 cm. wide; rays 20 30 



Fleabane, Erigeron hyssopifolius. 



218a. Stem unbranched, except for the peduncles; leaves chiefly 

 basal; heads 1 9 (2 5 dm. high; flowers pale-purple, spring) 



Fleabane, Erigeron pulchellus. 



218b. Stem branched; principal leaves on the stem; heads usually 

 numerous (3 12 dm. high; spring and summer) 219. 



