compositjE. 115 



16. ETJPATO'RIUM, Tonrn. Thorouohwort. 



1. E. purpu'reum, L. (Joe-Pyb weed. Tkumpet-weed.) 

 stem tall and simple. Leaves petioled, 3-6 in a whorl. 

 Flowers purplish or flesh-coloured. Heads in dense corymbs. 

 — Low grounds. 



2. E. perfoli'atum, L. (Boneset.) Stem short, hairy. 

 Leaves rugose, connate-perfoliate, tapering. Flowers whitish. 

 Corymbs very large. — Low grounds. 



3. E. ageratoi'des, L. (White Snake-boot.) Stem very 

 smooth, commonly branching, 2-3 feet high. Leaves 

 opposite, petioled, broadly ovate, pointed, coarsely serrate. 

 Flowers white, in corymbs. — Low rich woods. 



17. CACA'IiA., L. Indian Plantain. 

 C. tubero'sa, Nutt. stem angled and grooved, tall, from 

 a thick root. Leaves 5-7-nerved, the lower lance-ovate or 

 oval, tapering into long petioles. — Western Ontario. 



18. rvA, L. Mabsh Elder. 



1. I. axlUa'riS, Pursh. Stem 1-2 feet high, the nodding 

 heads mostly solitary in the axils of the upper leaves. 

 Leaves small, obovate to oblong-linear, entire, sessile. — 

 N. W. 



2. I. xanthiifo'lia, Nutt. Stem 3-5 feet high, the nar- 

 row spike-like clusters of heads forming a naked panicle. 

 Leaves large, broadly ovate, long-petioled, serrate. — N. W. 



19. SEKE'CIO, L. Groundsel. 



1. S. VUlga'riS, L. (Common Geoundsel.) Ray-florets 

 wanting. Stem low, branching. Leaves pinnatifid and 

 toothed, clasping. Flowers yellow, terminal. — Cultivated 

 and wasts grounds. 



2. S. viseo'SUS, L. Say-florets very minute. Stem viscid- 

 puhescent and strong^scented. Leaves twioe-pinnatifid. — 

 Atl. Prov. 



3. S. au'reus, L. (Golden Ragwort. Squaw-weed. J 

 Says 8-12. Stem smooth, or woolly when young, 1-2 feet 



