332 



374. PRENANTHES. Recept. nalied. Doivn nearly ses- 

 sile, simple. Cal. double. Florets in a single row. 



372. SONCHUS. Recept. naked. Doison sessile, simple. 

 Cal. simple, imbricated, swelling at the base. 



380. LAPSANA. Recept. naked. Do'W7i none. Cal. dou- 

 ble ; innermost of equal channelled scales. 



** Florets all tubular, lax and spreading in the limb. 

 Capitati. 



387. CARLINA. Ca(yj; swelling ; outer scales spinous ; 



inner coloured, polished, radiant. Recept. chaffy. 

 Do*wn feathery. 



382. ARCTIUM. Cal. globose ; scales spinous, hooked, 



indexed. 



384. CARDUUS. Cal. tumid, imbricated; scales spi- 



nous. Recept. hairy. Dovon deciduous, capillary, 

 roughish. 



385. CNICUS. Cal. tumid, imbricated ; scales spinous. 



Recept. hairy. Doison deciduous, feathery. 



386. ONOPORDUM. Cal. tumid; scales spinous, spread- 



ing. Recept. cellular, somewhat chaffy. 



383. SERRATULA. C«/. nearly cylindrical, imbricated; 



scales unarmed. Doxmn permanent. 



Centaurea 1. 



*** piorets all tubular, parallel, croXGded, nearly on 

 a level at the top. Discoid. 



389. EUPATORIUM. Recept. naked. Doxm rough. 



Cal. imbricated, oblong. Style cloven half waydown, 

 prominent. 



390. CHRYSOCOMA. Recept. naked. Doison rough. 



Cal. imbricated, hemispherical. *S/?//^ scarcely longer 

 than the florets. 



388. BIDENS. Recept. chaffy. Doivn rough with re- 



versed prickles. Cal. of many f)aralle], channelled 

 scales. Cor. occasionally radiated. 



391. DIOTIS. Recept. chaffy, with hairy-tipped scales. 



Doison none. Cal. imbricated, hemispherical. Flo- 

 rets with 2 spurs, which border the seed. 



Tanacetum. Senedol. Aster I. Anthemis 2, 



