SYNGENESIA— POL.-FRUSTRAN. Centaurea. 4G7 



part ; their colour is always darker than that of C. Jacea. Fl. 

 of a deeper crimson, commonly without any radiant or abortive 

 florets, and the latter when present are smaller than in C. Jacea. 

 Cal. essentially different, much blacker, though pale and downy 

 at the base ; each scale terminating in a heart-shaped, or ovate, 

 black appendage, regularly fringed with parallel, mostly paler, 

 teeth, the inner ones only being irregularly torn. Seeds obo- 

 vate, each crowned with a dense tuft of pale, rough, scaly bristles. 

 The /?o«;er5 are occasionally white. Ray describes a double va- 

 riety, shown him by Thomas Willisel, in which the proper^- 

 rets of the disk were all changed to handsome radiant ones, 



3. C. Cyanus. Corn Blue-bottle. 



Calyx-scales serrated. Leaves linear-lanceolate, entire ; 

 lower ones toothed towards their base. 



C, Cyanus. Lian. Sp. PL 1289. IfWd. v. 3. 229 1. FL Br. 91 \. 

 EngL Bot. V. 4. t. 277. Curt. Lond.fasc. 6. t. 62. MarL Rust. 

 e. 1 1 1 . Hook. Scot. 249. FL Dan. t. 993. BulL Fr. t.22l. 



Cyanus. Raii Sijn. 1 9S. Bau/i. Hist. v. 3. p. 1 . 2 1 ./. Fuchs. Hist. 

 428./. 



C. n. 191. HalLHisLv.]. 82. 



C. vulgaris. Ger. Em. 732. f. Lob. Ic. 546./. 



C. minor. Matth. Falgr.v. I. 463./. Camer.Epit.289.f. 



C. sylvestris. Fuchs. Ic. 241 ./. 



C. segetum vulgaris minor annuus. Moris. v. 3. 134. sect. 7. t.25./.4. 



Baptisecula. Trag. Hist. 566./. 



Papaver Heracleum. Column. Phytoh. 93. t. 92. ed. 2. 74. ^ 2 1. 



Blue Bottles. Petiv. H.Brit, t. 22. f. 4. 



In corn fields, a common weed. 



Annual. Julij, August. 



Root tapering, vvith many rigid fibres. Herb loosely cottony, of 

 a greyish hue. Stem 2 or 3 feet high, copiously branched, leafy, 

 angular. Leaves linear-lanceolate, pointed, entire ; the lower 

 ones broader, mostly toothed or pinnatifid, but the radical ones 

 are entire. FL numerou'^, solitary, on naked stalks. CaL ovate ; 

 its scales smooth, serrated, with sharp, white, or partly brown, 

 teeth. Radiantjlorets large and spreading, generally with more 

 than 5 segments, of a bright sky-blue ; those of the disk pur- 

 plish, with dark anthers. Seeds obovate, rather compressed, a 

 little downy, abrupt, each crowned with a dense conical tuft, 

 of very unequal, tawny, rough bristles. 



White and dark-purple varieties* sometimes with a multiplied ra- 

 dius, are commonly raised, amongst other hardy annuals, in 

 flower-gardens. They have no scent. The wild flowers afford 

 a blue for painting in water-colours, the expressed juice requi- 

 ring only to be mixed with cold alum water. The separate T^oref 

 in Engl. Bot. coloured with this, by way of experiment, has now 

 stood well for 30 years. 



2 II 2 



