CENTAUEEA. 219 



branches. Pappus or short. Heads sometimes radiant. Au- 

 tumnal forms have erect-patent branches, ending in solitary 

 heads ; vernal have almost divaricate branches. (3. C. decipiem 

 (Thuill.) ; phyll. -appendages erect lanceolate or ovate-lanceolate 

 usually not wholly covering the phyll. their teeth short. St. 

 usually simple, 1 -headed. L. broader than those of a. Teeth 

 often scarcely longer than the breadth of the brown appendage ; 

 3 inner rows of phyll. usually protruding. Pappus 0. Heads 

 usually (perhaps always) radiant. Sy.E.B.7Q7. C.nigrescens 

 (Bab.). The plant when seen is easily distinguishable from 

 the radiant form of C. nigra, although hardly to be separated 

 by characters. Meadows and pastures. jB. South of England, 

 rare. P. VI. IX. E. S. L 



** Phyll. lanceolate, their upper half with a somewhat scarious 

 deeply toothed or fringed decurrent margin. 



3. C. Cy'anus (L.) ; phyll. erect adpressed deeply toothed, 

 pappus rather shorter than the fruit, /. linear -lanceolate, the 

 lowermost toothed or pinnatitid. E. B. 277. St. 13 feet 

 high, loosely cottony, leafy. L. slightly cottony above, densely 

 beneath. Involucre greenish yellow ; phyll. often tinged with 

 purple in their upper half, margins brown decurrent with 

 whitish teeth. Heads with large radiant blue floivers, disk 

 purple. -Corn-fields. A. VI. VIII. Corn Bluebottle. E.S.I. 



4. C. Scabidsa (L.); phyll. erect adpressed, the triangular- 

 ovate black pectinate appendages not covering the inv., teeth 

 ascending setaceous short, pappus as long as the fruit, /. pinna- 

 tijld roughish, segments lobed with hard points. E. B. 56. 

 St. 2 3 feet high, rough, furrowed. L. hispid, lobes of the 

 upper ones entire. Heads on long naked stalks, solitary. In- 

 volucres usually rather woolly ; phyll. pale, with dark acute 

 membranous pectinate decurrent appendages ; teeth paler, short, 

 not longer than ^ the width of the phyllary, Fl. purple, outer 

 row radiant or 0. Rarely the inv. is quite covered by the 

 appendages. [/3. succisafolia (Marsh.) ; root-1. entire, upper st.-l. 

 entire, lower sometimes slightly lobed at base.]. Fields and hedges. 

 [/?. Sutherland, E. S. Marshall $ W. A. Shoolbred.~] P. VII. IX. 

 Great Knapweed. Matfellon. E. S. I. 



[C. paniculdta (L.) ; phyll. erect adpressed rigid with subulate 

 teeth and a short term, rigid point innermost narrow long toothed 

 at the end, pappus much shorter than the fruit, lower L pinna- 

 tifid with linear segments. R. xv. 780. St. about a foot high, 

 panicled above, rough, rather cottony. Heads cylindric-oblong. 

 Fl. purplish. Quenvais and St. Ouen's Bay, Jersey. B. VII.] 



L 2 



