238 SYNGEN. POLYGAM. iEftUAL. 



}7. ONOPORDUM. 



1 . O. Acanihmm {Cotton Thistle), scales of the involucre spread- 

 ing subulate, leaves ovato-oblong sinuated and spinous decur- 

 rent woolly on both sides. Lightf. p. 458. E. B, t. 977. 



Hab. ^^'aste places near tov/ns and villages, as at Weems on the coast 

 of Fife and half a mile beyond Preston Pans, &c. Light/. Field close 

 by the village of Cockenzie ; near Melrose ; and Links at Port 

 Seton, Maiigh. Near Musselburgh, Mr. Arnott. Fl. Aug. S^ . 



Four to six feet high, branched and winged to the summit. JVi7igs 

 very spinous. Involucre globose. Flowers purple. 



18. CARLINA. 



\. C. vulgaris [common Carli?ie), stem many-flowered corymbose 

 pubescent, leaves lanceolate unequally spinous and sinuated 

 downy beneath. Light f. p. 460. E! B. t. 11 44. 



Hab. Dry hilly pastures, but not very common. Light/. Near Ar- 

 broath, Mr. D. Stewart. Coast of Angus-shire, Mr. D. Don. 

 Coast of Galloway, near Glenluce ; and heughs of St. Cyrus, near 

 Montrose, Maugh. Fl. June, c? • 



One foot high. Very spinous, but the spines generally short. Exte- 

 rior scales or leaflets of the involucre much resembling the leaves, 

 but smaller ; inner ones linear membranous, yellow, entire, forming 

 a horizontal ray round the florets. Floivers purplish. Anthers with 

 2 bristles at the base. 



*** Discoidei. 

 19. BIDENS, 



1. B. cernua {nodding Bur-Marigold), flowers drooping, brac- 

 teas lanceolate entire (longer than the involucre), leaves lan- 

 ceolate serrated undivided, bristles of the pericarp about 4 

 erect. Light/. p. 4Q\. E.B.tAWL 



Hab. Sides of rivulets, ditches, and lakes, frequent. Fl. June — Aug. 



O- 

 One to two feet and more high, branched, slightly hispid. Leaves gla- 

 brous, deeply serrated. Floivers large, greenish yellow. 



2. B. tripartita {trifid Bur- Marigold), leaves tripartite, leaflets 

 lanceolate deeply serrated, bristles of the pericarp 2 — 3. 

 Light/, p. 462. E.B.t.l 113. 



Hab Marshy places and sides of lakes. Dr. Parsons. Kinross-shire, 



Mr. Arnott. Rare about Glasg. ; edge of a loch near New Kil- 



patrick, N. side, Flopk. Fl. July. ©. 

 Readily distinguished by its tri- and sometimes quinque-partite leaves. 



Thej^ou-erA, which are slightly drooping, are also smaller than those 



of B. cernua. 



20. EUPATORIUM. 

 1. E. cajinalinum {Hemp- yJgri77io?iy) , leaves opposite sub-pe- 



tiolate tri-quinque- partite their segments lanceolate deeply 



-serrated. Light/, p. 464, E.B.t. 428. 



