70 CALTCIFLOE^l. 



the top. Radical leaves spear-shaped, spinous ; stem-leaves 

 clasping, cottony on their under sides. Flower-heads large; 

 inner scales of the involucre cream-coloured ; florets red, with 

 yellow anthers. Fields about Torquay. Stentaway Hill. Bab- 

 bicombe Down. (E. B. t. 1144.) B. vn.-x. 



CENTAUFiEA. KNAPWEED, BLUE-BOTTLE, AND 

 STAR-THISTLE. 



1. C. nigra (black discoid Knapiveed.) In meadows and by 

 roadsides, frequent. Stem from 1 to 2 feet high, branched; 

 branches bearing one flower-head. Lower leaves stalked, lan- 

 ceolate, sometimes entire and sometimes deeply notched ; upper 

 leaves sessile. Flower-heads large and round ; florets purple, 

 the outer row spreading. Hedges and fields, very common. (E. 

 B. t. 278.) P. vui. ix. 



2. C. scabiosa (greater K.) Fields, hedges, and banks. 

 From 2 to 3 feet high ; stem erect, much-branched, rough and 

 furrowed. Leaves pinnatifid, rather rough ; segments lanceolate, 

 pointed. Heads on long, leafless stalks, solitary ; involucre large, 

 nearly round, and generally rather woolly. Florets purple, the 

 outer row spreading out in rays around the top of the involucre. 

 Fields about Torquay and Marychurch. Warberry Hill. Mead- 

 foot Cliffs. (E. B. t. 56.) P. vn.-ix. 



3. C. Cyanus (corn Bluebottle.) In cornfields, common. 

 Stem from 1 to 3 feet high, branched, cottony. Leaves nume- 

 rous, linear-lanceolate ; root-leaves slightly toothed ; both stem 

 and leaves downy. Flower-heads solitary ; involucre oblong ; 

 inner florets purple, outer row large and spreading, bright-blue. 

 Cornfields, common. (E. B. t. 277.) A. vi.-vm. 



4. C. Calcitiapa (common Star-T7iistle.) Gravelly and sandy 

 places. About a foot high ; stem branched, furrowed and 

 slightly hairy. Root-leaves deeply pinnatifid, with lanceolate 

 segments ; stem-leaves not so deeply cut, with linear lobes. 

 Flower-heads sessile, the scales of the involucre ending in long 

 sharp points ; florets purple. Exmouth Sands, Fl. D. (E. B. t. 

 125.) A. vn.-ix. 



TRIBE III. COEYMBIFEE^E. 



SUBTBIBE 1. TUBIFLOE^;. 



BIDBNS. BTJR-MARiaOLD. 

 1. B. cernua (nodding B.) Sides of ditches and in marshy 



