238 DICOTYLEDONS. COMPOSITE. CniCUS. 



Div. II. CINAROCEPHAJJE. Corollas all tubular and spreading. 

 13. ARCTIUM. 



Involucre globose, each of its scales with an incurved hook at the 

 extremity. Receptacle chaffy. Pappus simple. 



1. A. Lappa, leaves cordate petiolate. p. 235. Waste places. 



14. SERRATULA. 



Involucre cylindrical, imbricated with scales that are not spinous. 

 Receptacle chaffy. Pappus roughish or feathery, rigid, persistent. 



1. S. tinctorial leaves sharply serrated glabrous pinnatifid the ter- 

 minal lobe the largest, flowers in a small clustered umbel. 

 p. 235. Woods. 



2. S. alpina, leaves ovato-lanceolate attenuated at the base un- 

 divided toothed cottony beneath, involucre hairy, flowers in a 

 clustered umbel, p. 235. Alpine rocks. 



15. CARDUUS. 



Involucre swelling, imbricated with spinous scales. Receptacle 

 hairy. Pappus deciduous, roughish. 



* Leaves decurrent. 



l.C. nutans, leaves decurrent spinous, flowers drooping, scales 

 of the involucre lanceolate cottony, outer ones spreading. 

 p. 235. Waste places. 



2. C. acanthoidesy leaves decurrent sinuated spinous, involucre 

 globose nearly sessile, its scales linear slightly recurved, p. 236. 

 Way -sides. 



3. C. tenuiflorus, leaves decurrent sinuated spinous somewhat 

 cottony beneath, involucres nearly cylindrical clustered sessile, 

 their scales lanceolate erect, p. 236. Waste places. 



** Leaves sessile. 



4. C. marianus, leaves amplexicaul waved spinous, the radical 

 ones pinnatifid, scales of the involucre subfoliaceous recurved 

 spinous at the margin, p. 236. Waste places. 



16. CNICUS. 



Involucre swelling, imbricated with spinous scales. Receptacle 

 hairy. Pappus deciduous, feathery. 



* Leaves decurrent. 



1. Cn. lanceolatus, leaves decurrent hispid pinnatifid, their seg- 

 ments generally 2-lobed spreading spinous, involucres ovate 



a This species is observed, by Mr. Brown in his paper on Composites, pub- 

 lished in the Linn. Trans.) to be polygamous. One sex is figured in the Eng~ 

 lisk Botany , another in jFV. Danica. 



