SYNGENESIA— POL.-FRUSTRAN. Centaurea. 469 



Myacanthos. Dalech. Hist. 1474./. 

 Star-thistle, Petiv. H. Brit. t.2\.f.\\. 



In waste gravelly ground, or in sandy plains near the sea, chiefly 

 in the more temperate parts of England. 



Annual. July, August. 



Root tapering, whitish. Stem low and widely spreading, very 

 much and repeatedly branched, leafy, furrowed, solid, hairy, or 

 rather downy. Leaves scattered, sessile, hairy, unequally pin- 

 natifid, various in breadth, beset with prickly teeth ; upper ones 

 less divided, crowded under the flowers ; lowermost stalked. 

 Fl. rose-coloured, lateral, solitary, nearly or quite sessile, en- 

 compassed with a few leaves. Cal. ovate, each scale terminating 

 in a large, shai-p, channelled, spreading spine, fringed at its 

 base with smaller prickles. Radiant florets small, nearly re- 

 gular. Disk convex, with pale red anthers and stigmas. Seeds 

 obovate, polished, particoloured, with scarcely any crown. The 

 irritability oi the. filaments has been described by several authors. 

 When handled the herbage leaves a glutinous matter on the 

 fingers, which is very bitter. 



7 . C. solstitialis. Yellow Star-thistle. St. Barnaby's 

 thistle. 



Flowers terminal, solitary. Calyx-scales doubly spinous. 

 Stem winged, from the decurrent, lanceolate, unarmed 

 leaves ; radical leaves lyrate. 



C. solstitialis. Linn. Sp. PI. 1297. Willd. v. 3.2309. H.Br. 913. 



Engl. Bot. V. 4. t. 243. Tr. of Linn. Soc. v. 2. 236. 

 Calcitrapa n. 193. Hall. Hist. v. 1 . 83. 

 Jacea lutea annua stellata et aUita, foliis Cyani. Moris, v. 3. 145. 



sect. 7. t. 34. f. 27. 

 Carduus stellatus luteus, foliis Cyani. Raii Syn. 196. Bauh. Pin. 



387. 

 C. stellatus mitior apulus. Spina solstitialis altera. Column. Ecphr, 



V. 1.30. t.3\. 

 C. solstitialis. Ger. Em. 1 166./. 

 Spina solstitialis. Dod. Pempt. 734. f. Lob. Ic. v. 2. 12./. Bauh. , 



Hist. V. 3. p. 1.90. f. 91. 

 Leucacantha quorundam. Dalech. Hist. 1464./. 

 Yellow Thistle. Petiv. H. Brit. l.2\.f. 12. 



In cultivated fields, and about hedges, rare. 



By hedges not far from Cirencester, Gloucestershire. Bobaii. 

 Near Northfleet, Kent. Hudson. At Arminghall, near Nor- 

 wich. Mr. Crowe. In a grassy field near Dartford, Kent. Mr. 

 Charles Sinclair Cullen. 



Annual. July — September. 



Root tapering, whitish. Herb of a hoary green, slightly clothed 

 with cottony down, a little glutinous, intensely bitter. Stem 



