

238 SYNGEN. POLYGAM. 1E&UAL. 



17. ONOPORDUM. 



1. O, Acantliium (Cotton Thistle), scales of the involucre spread- 

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

 rent woolly on both sides. Li^hlf. p. 458. E.B. t. 977. 



HAB. Waste places near towns and villages, as at Weems on the coast 

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

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

 Seton, Maugh. Near Musselburgh, Mr. Arnott. FL. Aug. <$ . 



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

 very spinous. Involucre globose. Flowers purple. 



18. CARLINA. 



1. C. vulgaris (common Carline), stem many-flowered corymbose 

 pubescent, leaves lanceolate unequally spinous and sinuated 

 downy beneath. Lig/itf.p.46Q. El B. t. 1 144. 



HAB. Dry hilly pastures, but not very common, Lightf. Near Ar- 

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

 Coast of Galloway, near Glenluce ; andheughs of St. Cyrus, near 

 Montrose, Maugh. FL June. <$ . 



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

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

 but smaller 5 inner ones linear membranous, yellow, entire, forming 

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

 2 bristles at the base. 



*** Discoidei. 



19. BIDENS. 



1. B. ' cernua (nodding Bur -Marigold), flowers drooping, brae- 

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

 ceolate serrated undivided, bristles of the pericarp about 4 

 erect. Lightf. p. 461. E. B. t. 1114. 



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. Flowers large, greenish yellow. 



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

 lanceolate deeply serrated, bristles of the pericarp 2 3. 

 Lightf. p. 462. E. B. I. 1 1 13. 



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



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



patrick, N. side, Hopk. Fl. July. Q. 

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



The Jiowers, which are slightly drooping, are also smaller than those 



of B. cernua. 



20. EUPATORIUM. 

 1. E. cannalinum (Hemp- Agrimony), leaves opposite sub-pe- 



tiolate tri-quinque- partite their segments lanceolate deeply 



serrated. Lightf. p. 464. E. B. t. 428. 



