DICOTYLEDONS. — coMPOSiTyE. Centaurea. 239 



tomentose, their scales lanceolate spreading, p. 236. — Way- 

 sides. 



2. Cn. paliLstris, leaves decurrent scabrous piunatifid spinous, 

 involucres ovate clustered, their scales ovato-lanceolate niucro- 

 nate appressed. p. 236. — Meadows. 



** Leaves sessile. 



3. Cn. arvens'is, leaves sessile pinnatifid spinous, stem paniclcd, 

 involucre ovate, scales appressed mucronated.p. 237. — Fields. 



4. Cn. eriophorus, leaves sessile pinnatifid every other segment 

 pointing upwards spinous scabrous, involucres sphterical woolly. 

 p. 237. — Road-sides. 



5. Cn. heterophyllus, leaves amplexicaul lanceolate ciliato-den- 

 tate undivided or laciniated white and downy beneath, flowers 

 mostly solitary, p. 237- — Marshy places in the mountains. 



6. Cn. prniensis, leaves sessile lanceolate waved at the edge and 

 unequally spinous pubescent cottony beneath, flowers mostly 

 solitary, p. 237. — Pastures. 



7. Cn. acaulis, stemless, involucre glabrous, p. 237. — J^^'y pO-S- 

 iiires. 



17. ONOPORDUM. 



Involucre swelling, its scales spreading and spinous. Receptacle 



cellular. Pappus deciduous, rough. 

 1. O. Acanlhium, scales of the involucre spreading subulate, 



leaves ovato-oblong sinnated and spinous decurrent woolly on 



both sides, p. 238. — IVaste places. 

 18. CARLINA. 

 Involucre swelling, the ext. scales with mimerous spines ; the inner 



ones coloured, scariose. Receptacle chaffy. Pappus feathery. 

 I.e. vulgaris, stem many-flowered corymbose pubescent, leaves 



lanceolate unequally spinous and sinnated downy beneath. 



p. 23^.— Dry hills. 



19. CENTAUREA. 



Involucre scaly. Receptacle bristly. Corolla<! of the ray steille, 

 infundibnliform, irregular, longer than those of the disk. Pap- 

 pus simple. 



1. C. Ji/cec, scales of the involucre scariose torn^ the lower ones 

 pinnatifid, leaves linear lanceolate, the lower ones broader and 

 toothed, p. 24S. — Woods and pastures, rare. 



2. C. nigra, scales of the involucre ovate ciliated with capillary 

 teeth, lower leaves angulato-lyrate, upper ones ovate, p. 248. 

 — Pastures. 



3. C. Cyanus, scales of the involucre serrated, leaves linear entire 

 the lowermost toothed, p. 249. — Cornfields. 



4. C. Scaliosa, scales of the involucre ciliated ovate pubescent. 



