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MONOECIA PENTANDRIA. 

 433. XANTHIUM. Bur- weed. 



Linn. Gen. PIAS7 . Juss.\9\. Fl. Br. 1017. Tourn.t. 2b2. Lam. 

 t.76D. Gcertn.t.\64. 



Nat. Ord. Compositce, ?, micamentacece, Linn. 49. Corym- 

 bifera, sect. 9, anomaltjo. Juss. 65. 



Barr. fl. compound. Common Cal. of many, thin, imbri- 

 cated, equal scales, on a level with the uumevous florets. 

 Cor. compound, hemispherical, uniform \jiorets monope- 

 talous, tubular, funnel-shaped, erect, in 5 equal, mar- 

 ginal segments. Filam. 5 in each floret, converging in 

 the form of a cylinder. Antli. erect, distinct, parallel. 

 Common Receipt, scarcely any ; the jlorets are separated 

 by scales. 



Fert.Jl. below the barren ones. Common Cal. 2-flowered, 

 of 2 opposite, acutely and unequally 3-lobed, leaves, 

 beset all about with hooked prickles, and closely united 

 to the germen in every part, except the segments. Cor. 

 none. Germ, oval, clothed with the prickly calyx. 

 Styles 2 pair, capillary. Stigmas undivided. Drupa spu- 

 rious, formed of the permanent calyx, dry, elliptic-ob- 

 long, covered with prominent hooked prickles ; cloven at 

 the summit. Nut of 2 cells. Seeds solitary. 



Herbaceous, or somewhat shrubby, rather downy, of a 

 coarse habit. Leaves alternate, stalked, simple, lobed. 

 Stipulas in some spinous. Fl. axillary and terminal, 

 spiked, greenish, inconspicuous. Fr. large, aggregate, 

 armed with hooked adhesive prickles. 



1. IL. strumarium. Broad-leaved Bur-weed. 

 Prickles none. Leaves heart-shaped ; three-ribbed at the 



base. 

 X. strumarium. Linn. S-p. PI. WOO. Willd.v.4.S73. H.Br.\0l7. 



Engl. Bot.v. 36. t 2544. Fl. Dan. t.970. Ehrh. PL Of. 419. 

 X. n. 1621. Hall. Hist. V. 2.292. 

 X. seu Lappa minor. Rail Syn. 140. Bauh. Hist. v. 3. p. 2.5/2./. 



Matth.Faigr.v. 2. 545./. 

 Xanthium. Fachs. Hist. 579./. Ic. 333./ 

 Bardana minor. Ger. Em. 809 /. Merr. Pin. 14. 

 Small Burdock. Petiv.H. Brit. t.\./\2. 



