VASGULA R PLAN TS. 35 



its scales narrow. Receptacle flat. Pappus 



4 — 12, obtuse, chaffy scales. 



0. flowers yellow, white, flesh-color. 



*7. Helenium, L. 



Superflua. Flowers of the ray palmate. In- 

 volucre 2-seriate; external scales co , narrow, 

 foliaceous, spreading, at length reflexed; inter- 

 nal few, paleaceous. Receptacle globular, naked. 

 Pappus 5 — 12, membranaceous paleae. 



U . flowers yellow, disk purple, leaves alter- 

 nate. 



48. Blennosperma, Less. 



Necessaria. Pay -flowers ovate, ligulate, 

 without tube. Scales of the involucre 1-se- 

 riate, membranaceous. Receptacle flat, naked. 

 Akenes pyriform, papillate, gelatinous when 

 wetted; pappus 



0. flowers pale yellow; leaves alternate. 



Tribe VI Anthemideae 



Receptacle not paleaceous. Scales of the in- 

 volucre scarious. Pappus not capillary. 



4-> Achillea, L. 



Superflua. Head x-flowered; ray-flowers 

 5 — 6, ligulate, ovate. Involucre ovate; scales 

 imbricate, those of the receptacle hyaline. 

 Akenes ob-compressed. marginate; pappus 0. 



IS. . flowers white, red, yellow. 



