250 SYNGEN. POLYGAM. FRUSTR. Centaurea, 



toothed. Leaves linear-spear-shaped, entire ; lower 

 ones toothed towards their base. E. B. 277« C. 6. 

 62. Cyanus vulgaris. G. E. 732. 



Cornfields. 



An. July. 



Stem two, or three f., erect, angular, much branched alternately^ 

 Ls. stalkless, light greyish green, with three ribs, and somewhat 

 cottony beneath ; lower owes generally toothed ; root-ones (in the 

 young plants) entire. Fl. solitary. Cal.-scales with brown 

 indentations. Flor. of the ray, bright, shewy blue, horizontal, 

 very large ; of the disk, smaller, purplish. Filam. just below 

 the anth. with a fringe of silvery hair. 

 Fl. dye sugar blue. Linn. Fl. Suec. 

 White and dark-purple varieties introduced into our gardens, 



but not permanent. The flowers afford a blue colour; the 



expressed juice mixed with cold alum water. The separate ^orei 



in F7i(]f. Bot. coloured with this, by way of experiment, has stood 



well for thirty years. Sm. 



C. Scabiosa. Greater Kn. Calyx-scales egg-shaped, 

 fringed, somewhat downy. Leaves wing-cleft ; seg- 

 ments bluntly spear-shaped, roue^hish, partly toothed. 

 E. B. 56. Jacea major. G. E.^727. 



Borders and ridges of cornfields, way sides. 



Per. July. 



Stem hard, about two f., erect, alternately branched, leafy. FL 

 solitary, on long foot-stalks, she\\'y. Cal.-scales triangular, 

 acute, comb-like in the margin, tipped with black. Cal. globu- 

 lar, permanent, becoming bent back, very conspicuous from its 

 silvery hue. Ls. alternate, root-ones on long foot-stalks. Fl. 

 purple, very large, sometimes white. Seeds food for small birds. 



(C. solstitidlis. Yellow St. T, Not far from Cirencester. 

 Bobart, in Tur. See Appendix,) 



