45. COMPOSITE. 177 



tt Receptacle imthqut males or scaly only at the margin. Pr. 

 oj/lindi-ical o/r compressed. Pappus hairjike. 



(12.) 21. Gnaphalium. Fl. all tubular; outer fam. ; central 

 perfect. Receptacle flat, not scaly. • Inv. hemiapllerical, 

 , ■ imbrfeatejphyll. equalling the florets but not intermixed 

 with them.T^Oor, ot'the fem. florets often inconspicuous. 



(13.) 20. FiLAGo. Outer fl. fem., filiform, in several rows ; 

 outermost ones intermixed with the inner phyUaries; central fl. 

 few, perfect^ tubular. Receptacle cmiical, scaly at the margin. 

 Inv. subcorneal, imbricate ; ' phyU.. lanceolate, longer than 

 the flowers. ' 



(14.) 22. Antknnaria. Heads subdicecious. Male f^. tu- 

 bular ; style almost simple ; pappus clavate. Fem. fl. fili- 

 form. Receptacle convex, not scaly, lav. hemispherical, 

 imbricate ; phyU. coloured at the end. 



B. Pappus 0, or memhranom. 



t Receptacle without scales. Heads radiant. Fl. of the ray 

 fem., ligulate, in 1 row j of the disk herm., tubular. 



(16.) 6. Bellis. Phyll. in 2 rows, equal, blunt. Receptacle 

 conical. Fr. compressed. Pappus 0. 



(16.) 15. Cheysanthemum. Involucre hemispherical. Fr. 

 of disk terete, without wings ; of the, ray slightly angular 

 or someyvhat winged. Pappus or of 3 minute teeth. 



(17.) 14. Matricaria. Involucre conical, hemispherical or 

 nearly flat. Fr. angular, not winged. Pappus 0, or a slight 

 membranous border. 



tt Receptacle without scales. Heads discoidal. 



(18.) 17. Artemisia. Fl. of disk perfect ; of the ray fem., 

 slender, in 1 row; or aU herm. and tubular. Involucre 

 roundish. PhyU. imbricate. Receptacle naked or hairy. 

 Fr. obovate, with a small epigynous disk, without pappus. 



(19.) 18. Tanacetum:. Fl. as in Artemisia. Involucre he- 

 mispherical. Phyll. imbricate. Receptacle naked. Fr. 

 oblong, angular, with a large epigynous disk (as broad as the 

 fruit), crowned with a slight membranous border. 



ttt Receptacle scaly. Pappus scal^-like. 



(20.) 19. Gaiinsoga. Heads radiant. Fl. of ray fem., li- 

 gulate, in one row ; of the disk perfect, tubular. Recep- 

 tacle conical. PhyU. 4 — 5, in one row. Fr. prismatic, 

 with a pappus of oblong scales. 



l5 



