COMPOSITE. Ill 



3. C. benedic'ta, L. {Gnicus henedictus, L.) Flowers 

 yellow. Pappus double, of 10 long outer bristles and 10 

 short inner ones. A low branching annual, with clasping 

 cut leaves, and large sessile leafy-braoted heads. — Atl. Prov. 



6. XAN'THIEM, Tourn. Clotbub. 



1. X. Canadense, Mill.,var. eehina'tum, Gray. (Com- 

 mon CocKXBBtTB.) Stem rough, not prickly or spiny. 

 Leaves broadly triangular, and somewhat heart-shaped, long- 

 petioled. Fruit a hard 2-celled bur, nearly an inch long 

 clothed with stiff hooked prickles, the two beaks of the fruit 

 long and usually incurved. — Low river-banks and waste places. 



2. X. spino'sum, L. (Spiny Clotbdk.) Stem armed 

 with conspicuous straw-coloured triple slender spines, at the 

 bases of the lanceolate short-petioled leaves, the latter white*- 

 woolly beneath. — Town of Dundas, Ontario; the seeds having 

 been brought in wool from South America. 



7. AMBRO'SUL, Tourn. Ragweed. 



1. A. artemisisefolia, L. (Hog-weed.) Stem erect, 

 1-3 feet high, branching, hairy. Leaves twice-pinnatifid, the 

 lobes linear, paler beneath. — Waste places everywhere, but 

 not so common northward. 



2. A. trif'ida, L., (Great Ragweed) is found in low 

 grounds in the south-west of Ontario ; also at Montreal and 

 Ottawa. Stem stouter than No. 1, 2-4 feet high. Leaves 

 opposite, deeply S-lobed, the lobes oval-lanceolate and serrate. 



8. FRAASE'BIA, Cay. 



F. Hookeria'na, Nutt. Low and diffuse, hairy. Leaves 

 bipinnatifid, at least the lower ones. — N.W. 

 9. XANACETrM, L. Tansy. 



1. T. vulga'pe, L. (Common Tansy.) A very strong- 

 scented herb, 2-4 feet high, smooth. Leaves twice-pinnate, 

 the lobes serrate, as are also the wings of the petiole. Heads 

 densely corymbed. Var. erispum, DC, is easily disting- 

 uished by its crisper and more incised leaves. — Old gardens 

 aad roadsides near dwellings. 



