466 SYNGENESIA— POL.-FRUSTRAN. Centaurea. 



furrowed, and rather less rough. Lower leaves somewhat lyrate, 

 partly stalked, finely toothed ; upper sessile, either partly tooth- 

 ed near the base, or quite entire ; sometimes clasping the stem 

 with their heart-shaped base ; sometimes only ovate in that 

 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 Jlowers are occasionally white. Ray describes a double va- 

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

 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. Linn. Sp.Pl.\2%^. Willd. v. 3. 229]. H.Br.9\\. 



Engl. Bot. v.A.t. 277. Curt. Lond.fasc. 6. t. 62. Mart. Rust. 



t.lll. Hook. Scot. 249. Fl. Dan. t. 993. Bull. Fr. t.22\. 

 Cyanus. RanSyn.\9S. Bauh. Hist. v. 3. p. i. 21. f. Fuchs. Hist. 



428./. 

 C. n. 191. Hall. Hist. v. 1. 82, 

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

 C. minor. Matth. Valgr. v. 1 . 463. / Camer. Epit. 289. f. 

 C. sylvestris. Fuchs. Ic. 241. f. 

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



/4. 

 Baptisecula. Trag. Hist, 566. f. 



Papaver Heracleum. Column. Phytoh. 93. t. 92. ed. 2. 74. <. 21 . 

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



In corn fields, a common weed. 



Annual. July, August. 



Root tapering, with 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. FZ. numerous, solitary, on naked stalks. Cal. ovate; 

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

 teeth. Radiant florets large and spreading, generally with more 

 than 5 segments, of a bright sky-blue j 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 veiy unequal, tawny, rough bristles. 



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



