SYNGENESIA— POLYGAM.-^QU.Onopordiim.395 

 386. ONOPORDUM. Cotton thistle. 



Linn. GenAOO. Juss. 173. FL Br. 856. Vaill. ]\Um. de VAc. des 

 ^Sc. 152./. 39. Lam.t.QQA. Gcertn. t.\Q\. 



Common Col, orbicular, tumid, imbricated, of numerous, 

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

 permanent. Cor. compound, uniform ; Jiorets very nu- 

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

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

 pillary, very short. Anth, 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. Doxtm sessile, capillary, rough, annular at 

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

 deciduous. Recej)t. convex, fleshy, deeply cellular, the 

 membranous edo-es of the cells uneven, jaffored, or frinof-ed. 



Very large, hoary, spmous, 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. Acanthium. Common Cotton-thistle. 



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



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

 O. Acanthium. Linn. Sp. PI. 1 158. WiUd. v. 3. 1686. FL Br. 856. 



Engl. Bot. V. 14. t. 977. Curt. Lond.fasc. 5. t. 57. Hook. Scot. 



238. Fl. Dan. t. 909. 

 O. n. 159. IJalLIIist.v.\.6S. 



Carduus tomcntosus Acanthium dictus, vulgaris. Rail Syn. 196. 

 C. alutus tomentosus latifolius vulgaris. Moris. i\ 3. 152. sect. 7 



t.30.f. 1. 

 Acanthium. Dad. Pempt.72\.f. Matfh. J'algr. v.2. 'Si.f. Camcr. 



Fpit.AW.f. Lub.lc.v.2.\.f. 

 A. album. Ger. Em. l\ 49./. 

 Spina alba sylvestris. Fiichs. nist.i>7. f. Jc. 33./. BauJi. Hist 



f. 3. p. 1.5 1./. 

 S. alba tomcntosa latifolia sylvestris. Locs. Pruss.2()\. t. 82. 

 Silibum, sive Leucantha Loniccri. Dalech. Hist. \A(J6. f. not dcscr. 

 Cotton Thistle. Pclir. //. Brit. t. 21./ 10. 



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



soil, frequent. 

 Biennial. Jitli/, August. 



