250 



-f^ 



SYNGENESIA iEQUALIS. 



610 RUDBECKIA. 



611 CENTAUREA 



POLYGAMM NECESSARIA. 



512 CHAPTALIA. 



513 SILPHIUM. 



514 FOLYMNIA. 



515 CHRYSOGONUM. 



616 GYMNOSTYLES 



517 PARTHENIUM. 



518 IVA. 



519 AMBROSIA, 



520 XANTHIUM. 



POLYGMIM SEGREGJlT.l 

 521 ELEPHANTOPUS. 



^"^^9^9^^** 



4' 



LEONTODON. 



EN. Pl. 1237. 



Involucrum imbrica- 



Involucrum 



imbri- 



tum, squamis inferior!- cate, with the lower 



bus, laxiuscuUs. Pap- scales loose. 



Pappus 



pus plumosus, stipita- feathered, stipitate 



tus. 

 nudum. 



Receptaculum Receptacle naked. 



1. Taraxacuju. 



L. involucri squamis 

 exterioribus reflexis; 



scapo 



uuifloro; 



foliis 



runcinatis, glabris, la 

 ciniis lanceolatis, den 



tctis. 



Exterior scales of 

 the involucrum reflect- 

 ed| scape one-flower- 

 edj leaves runcinate, 



labrous, the segments 

 lanceolate, toothed. 



Sp. pl. 3. 2544. Mich. 2. p. 88. Pursh, 2. p. A97. Nutt. 2. p. 123. 



Uoo^ perennial. Xecpe« all from the root, oblong, runcinate, glabrous, 

 when yoyng a little hairy. Scapes several from each root, terete, glabrous, 

 shorter than the leaves, one-flowered. Leaves of the involucrum numerous; 

 the interior series equal, appressed, frequently coloured, when old retlexed, 

 the exterior lanceolate, imbricate, slightly fringed. Corolla ligulate, yel- 

 low. Seeds oblong, angled, compressed towarcS the summit, slightly m"' 



