[ 136 ] 



MONOECIA PENTANDRIA. 



433. XANTHIUM. Bur-weed. 



Linn. Gen. PL 487. Juss.\9l. Fl.Br.l017. Tourn.t.252. Lam. 

 1.765. G£ertn.t.l64. 



Nat, Ord. Compositce, ?, nucamentacets. Linn. 49. Coi'ym- 

 biferce^ sect. 9, anomalcs. Juss. 55. 



Barr. fl. compound. Commo7i Cal. of many, thin, imbri- 

 cated, equal scales, on a level with the numerous Jlorets. 

 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. Atith. erect, distinct, parallel. 

 Commo7i Recept. scarcely any ; the Jiorets 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 j^rickly calyx. 

 S/fi/ZfS 2 pair, capillary. S/Zgwos undivided. Z)rw7;« 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 . X. strumarium. Broad-leaved Bur-weed. 



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

 base. 



X. strumarium. imw.Sp. PZ. 1400. Willd.v.4.o72,. Fl.Br.\0\7. 



Engl.Bof.v. 36.1.2544. H. Dan. t. 970. Ehrh. PL Of. 419. 

 X. n. 1621. Hall. Hist. V. 2. 292. 

 X. .seu Lappa minor. Raii Syn. 140. Bauh. Hist. v. 3. p. 2. 5/2./. 



Matth. Valgr. v. 2. 545. f. 

 Xanthium. Pucks. Hist. 579./. Ic. 333./. 

 Bardana minor. Ger. Em. 809 f. Merr. Pin.]4. 

 Small Burdock. Petiv. H. Brit.'t. 1./. 12. 



