396SyNGENESIA— POLYGAM.-^QU.Onopordum. 

 386. ONOPORDUM. Cotton thistle. 



Linn. Gen. 409. Jiiss. 1 "3. FL Dr. 856. VailL Mem. de V Ac. des 

 Sc. 152./. 39. Lam. t. 664. Gcertn. f. 161. 



Common Cal. orbicular, tumid, imbricated, of numerous, 

 lanceolate, spinous-pointed scales, spreading, or erect, 

 permanent. Cor. compound, uniform ;^or£'/5 very nu- 

 merous, equal, tubular, funnel-shaped ; tube very slen- 

 der ; limb in 5 deep, linear, equal segments. Filam. ca- 

 pillary, very short. Aiith. in a cylindrical tube, with 5 

 teeth. Germ, obovate, short. Style thread-shaped, pro- 

 minent. Stigma oblong, notched. Seed-vessel none, ex- 

 cept the somewhat spreading calyx. Seed obovate, point- 

 ed, smooth. Dowri sessile, capillary, rough, annular at 

 the base, embracing the point of the seed, and finally 

 deciduous. Recept. convex, fleshy, deeply cellular, the 

 membranous edges of the cells uneven, jagged, or fringed. 

 Very large, hoary, spinous, annual or biennial herbs ; ge- 

 nerally with winged stems ; in some species without any. 

 Leaves pinnatifid, wavy, toothed, and spinous. Fl. pur- 

 ple, solitary and terminal, or aggregate and radical. 

 The honey-comb receptacle characterizes the genus, and 

 its habit also is appropriate. 



1. O . Acanthmm. Common Cotton-thistle. 



Calyx-scales awl-shaped, spreading in every direction. 



Leaves ovate-oblong, sinuated, woolly on both sides. 

 O. Acanthium. Linn. Sp. PI. 1 1 58. mild. v. 3. 1 686. . Fl. Br. 856. 



Engl. Bot.v. M.t. 977. Curt. Loud. fuse. 5. t. 57. Hook. Scot. 



238. Fl.Dan.t.009. 

 O. n. 159. Hall. Hist. V. 1.68. 



Carduus tomentosus Acanthium dictus, vulgaris, Raii Syn. 196. 

 C. altitus tomentosus latifolius vulgaris. Moris, v. 3. 152, sect. 7. 



t.30.f. 1. 

 Acanthium. Dod.Fempt.72\.f. Matth. Valgr.v.2.oA.f. Camer. 



Epit. 44 1 ./. Lob. Ic. V. 2, 1 ./. 

 A, album. Ger. Em. 1 149./, 

 Spina alba sylvestris. Fuchs.Hist.57.f. /c 33,/, Bauh. Hist. 



v.Z.p. 1,54./. 

 S. alba tomentosa latifolia sylvestris. Loes. Priiss. 261 . <• 82. 

 Silibum, sive Leucantha Loniceri. Dalech. Hist. 1466./. not descr. 

 Cotton Thistle. Petiv. H. Brit. t.2\.f.l0. 

 In waste ground, on hedge banks, and by roadsides, in a gravelly 



soil, frequent. 

 Biennial. July, August 



