SYNGENESIA— POLYG.-SUPERF. Tanacetum. 405 



Sea Cotton-weed. Petiv, H. Brit. t. 20. f. 8. 



On the sandy sea coast, rare. 



In Anglesea and Cornwall. Rot/. Dorsetshire and the isie of She- 

 pey. Hiids. Pultency. On the beach just above high-water 

 mark, one mile north of Landguard fort, Suffolk, 1 793 j also 

 between Lowestoft and Pakefield, and on other parts of the 

 Suffolk coast. 



Perennial. August, September. 



Root branched and tufted, running very deep into the sand. Whole 

 herb densely cottony and singularly white. Stems scarcely a 

 foot high, recumbent at the base, branched and corymbose 

 above, round, copiously leafy. Leaves scattered, in four rows, 

 sessile, oblong, obtuse, flat, crenate, withering, permanent, 

 being held together by their cottony coating. Fl. yellow, in ter- 

 minal corymbose tufts. Cal. densely woolly. Seeds brown. 



My friend Dr. Hooker has, like the learned M. Cassini, well re- 

 sisted the gratuitous change of the excellent and original spe- 

 cific name. 



SYNGE^'ES1A—P0LYGA M.-SUFE RF. 

 392. TANACETUM. Tansy. 



Linn. Gen. A\7. Juss.XSA. Fl. Br. S62. Tonrn.t.26\. Lam. 

 t. 696. GcBrtn. f. 165. 



Nat. Ord. Compositce, y, discoidece. Linn. 4'9, Corijmhiferce, 

 sect. 4'. Juss. 55. 



Common Cal. hemispherical, imbricated ; .scales elliptic-ob- 

 long, compact, the innermost membranous at the margin. 

 Cor. compound, of two kinds oljiorets; those of the disk 

 numerous, tubular, regular, level-topped, with a 5-cleft 

 limb, perfect ; of the radius few, sometimes wanting, tu- 

 bular at the base, their limb flat, spreading, slighdy pro- 

 minent, 3-cIeft, without stamens. Filam. in the florets of 

 the disk only, capillary, very short. Anth. in a cylindri- 

 cal tube. Germ, in all the florets obovate, compressed. 

 Style thread-shaped. Stigmas 2, a little prominent, re- 

 curved, obtuse. Seed-vessel none but the permanent ca- 

 lyx. Seed oblong, angular, crowned with a slight mem- 

 branous border. Reccpt. convex, dotted, naked. 



Bitter, strongly aromatic herbs, with alternate, or scattered, 



