J TO SYNGENESIA POLYGAMIA FRUSTRANEA. [CI. 19. 



Hills in Derbysh. If. 8. 18. in. Fl. few, scented, buff-coloured, 



3. A. Millefolium, 11. 758. (Common Y. or Milfoil.) Leaves doubly 



pinnatifid, hairy ; segments linear, toothed, pointed. Stem fur- 

 rowed. 

 Mead, and past. If. 6 — 8, \f Fl. numer., small, white, or reddish. 



4. A. tomentosa, 36. 2532. (Woolly Y. or M.) Leaves doubly pin- 



natifid, woolly ; segments crowded, linear, acute. Corymbs re- 

 peatedly compound. 

 Dry hills, Sc. and Ir. : native ? If. 8. A span. Fl. golden yellow. 



SYNGENESIA POLYGAMIA FRUSTRANEA. 



410. CENTaUREA. Knapweed, Blue-bottle, and Star-thistle. 



1. C Jdcea, 24. 1678. (Brown Kn.) Calyx-scales membranous, torn ; 



lower ones pinnatifid. Leaves linear-lanceolate ; radical ones 

 elliptic-lanceolate, toothed. Flowers radiant. Seed-down very 

 short, in a simple row. 

 Past. rare. If . 8, 9. Stem 1 f. leafy. Cal. brown. Fl. purple. 



2. C. nigra, 4. 278. (Black Kn.) Calyx-scales oval, fringed with 



upright capillary teeth. Lower leaves somewhat lyrate, with 

 angular lobes ; upper ones ovate. Flowers discoid. Seed-down 

 very short, tufted. 

 Fast. If • 6 — 8. Rather taller and more bushy. Cal. black. 



3. C. Cydnus, 4. 277. (Corn B.) Calyx-scales serrated. Leaves 



linear-lanceolate, entire; lower ones toothed towards their base. 

 Corn fields. 0. 7, 8. 2 — 3 f. Disk purplish ; rays bright sky-blue. 



4. C. Scabiosa, 1. 56. (Greater Kn.) Calyx-scales ovate, fringed, 



somewhat downy. Leaves pinnatifid ; segments lanceolate, 

 roughish, partly toothed. 

 Borders of fields. If. 7, 8. 2 /! Fl. large and handsome, crimson. 



5. C. Isndrdi, 32. 2256. (Jersey Star-thistle.) Calyx-scales with 



palmate spines. Leaves toothed, somewhat lyrate, roughish, 

 slightly clasping the stem. Flowers terminal, solitary, leafy at 

 the base. 

 Meadows, in Jersey, If. 7, 8. Stems recumb. 6 — 8 in. Fl. light purp. 



6. C.Calcitrapa, 2. 125. (Common S.) Flowers lateral, sessile. Calyx- 



scales doubly spinous. Leaves pinnatifid, toothed. Stem hairy, 

 widely spreading. 

 Waste, sandy soil. 0. 7, 8. Low and spread. Fl. lateral, rose-col. 



7. C. solstitidlis, 4. 243. (Yellow S.) Flowers terminal, solitary. 



Calyx-scales doubly spinous. Stem winged, from the decurrent, 

 lanceolate, unarmed leaves ; radical leaves lyrate. 

 Fields, rare, not native. 0. 7, 8. Stem 1£ — 2f Fl. bright yellow. 



