CLASS XVIII. ORDER H. 93 



panicled. Jl. y. — rugosa^ very rough, lower leaves 

 with close serratures, racemes spread-panicled. y. 

 '^canadensis ^ stem downy, leaves rough serrate, 

 racemes panicled recurved, ligulate, florets abbre- 

 viated. %'y RACEMES ERECT bicoloVy IcaVCS 



oval, lower ones serrate, stem and leaves hairy, ca- 

 lyx-leaves obtuse. %. w-y. — lanceolata^ stem and 

 leaves glabrous, branching, leaves lance-linear en- 

 tire, corymbs terminal, y.. y — laevigata, stem and 

 leaves smooth, leaves fleshy, peduncles scaly 

 downy. 1^. y. — caesia^ (a variety of flexicauUs) 

 glabrous, leaves acuminate, racemes axillary, y. 



Senecio. Calyx cylindric ; leafets with wither- 

 ing, blackish tips, and a few small calycle leafets at 

 the base : egret simple: receptacle naked. 49. 55 

 ^•-aureus, (rag-wort) root-leaves heart-ovate ser* 

 rate petioled, slem-leaves pinnatifid-toothed with 

 lanceolate terminal divisions. 2/.y. — hieracifolius,^ 

 ray obscure, leaves clasping oblong unequally tooth- 

 ed. 0. y. — vulgaris, ray obscure, flowers scatter- 

 ed, leaves sinuate-pinnatifid clasping toothed. 0, 

 y. — elongatusy glabrous, root-leaves spatulate, stem- 

 leaves pinnatifid. %. 



TussiLAGo. Calyx simple, scales equal, and 

 equalling the disk, sub-membranous : receptacle 

 naked : pistillate florets ligulate or without teeth : 

 egret simple, sessile. (Sometimes polygamous.) 

 49. ^S — farjara, (colt*s foot) scape 1 -flowered sca- 

 ly, at length come out radical heart-angular leaves. 



X-y- 



Aster. Calyx imbricate, the inferior scales 

 spreading : egret simple : receptacle naked, scro- 

 biculate. (Florets of the ray more than 10, except 

 in solidaginoides, and a few other species.) 49. 55. 



Leaves lance- linear entire solidaginoidesy 



(star-flower) leaves obtuse with scabrous margins, 

 branches fastigiate-corymbed, flowers sessile with. 



