DICOTYLEDONES : GAMOPETAL^. 



663 



Tribe 1. Eupatoriece. Leaves mostly opposite : flowers all tubular, ^ ; the 

 branches of style narrow ; papilla extending to the middle. 



Eupatorium camiabiniim, the Hemp Agrimony, is common in damp places. 



Tribe 2. Asteroidece. Leaves alternate: ray-florets ? or sterile, generally 

 ligiilate : branches of the style hairy above, papillae extending to where the 

 hairs begin. Many species of Aster, belonging chiefly to North America, are 

 cultivated as ornamental plants, as also Callistephus hortensis, commonly known 

 as the China Aster. Erigeron acre, alpinum, and canadense occur in England ; 

 the last is an imported weed. Bellis perennis, the Daisy, has no pappus. Solidago 

 virgaurea is the Golden Rod. 



Fig. 468.— Flowers of Compositse : / fruit or ovary : h its beak ; p pappus; c corolla ; r 

 stamens; o anthers; n stigmata. A Ligulate flower of Taraxacum, with a5-toothed corolla- 

 limb, 3 . B Capitulum of Achillea : m floret of the ray, with liKulate 3-tootbed corolla, ? ; 

 r»i 9 florets of the disc, with a 6-toothed tubular corolla; i involucre. C Longitudinal 

 section more highly magiiifted ; r receptacle; i involucre; d bracteoles (palea?) ; ra floret 

 of the ray ; m florets of the disc ; n' stigmata of the $ flowere. D Fruit of Tanacetum 

 with a scaly pappus: E of Taraxacum, with a hairy pappus; h beak: F of Artemisia 

 without a pappus (mag.). 



Tribe 3. Senecionidea. Leaves alternate : ray- florets in one row, ligulate 

 ? , rarely absent: branches of the style tufted at the tips. 



Senecio vulgaris, the common Groundsel, has no ray-florets. Arnica viontana 

 occurs in Alpine woods. Two species of Doronicum {D. Pardaliauches and 

 plantagiueum) have become naturalized in England. Petasites vulgaris, the 



