﻿COMPOSIT.^:. 



.72. CARDUUS. Tourn.; Linn, (excl. spec); Gartn.fr. t. 162; DC. I c. 

 Bristles of the pappus scabrous (not plumose) : otherwise as in Cirsium. 

 § Bristles of the pappus few and slender — Leptocii^ita, Nutt. 

 . C. occidentalis (Nutt.): perennial, dwarf ; leaves deeply pinnatifid, nearly 



Nuttall.— Stem tomentose, 6-12 inches high. 



Nutt. in trans. Amer. phil 

 St. Barbara, Californi? 

 Leaves 4-5 inches long, j 

 cauline clasping. Heads 2-3, subsessile, pale purple. Plant with the habit 

 of Cirsium discolor, Nutt.—We have not seen this plant, the only one of the 

 genus known to inhabit this continent. May it not be some species of South- 

 ern Europe, introduced into California ? 



is probably conrectly referred hy Sprengel to Carduus defloratus. 



173. ONOPORDON. VailL; Linn.; Gmrtn.fr. 1. 161; Schkvhr, handb. t. 230. 



Heads many-flowered ; the flowers perfect. Scales of the ovate-globose 

 involucre imbricated, coriaceous, tipped with a lanceolate spinescent appen- 

 dage. Receptacle fleshy, deeply alveolate; the alveoli membranaceous, 

 sinuate-toothed. Tube of the corolla incrassated at the summit. Anthers with 



ing herbs; the stems winged by the decurrent base of the lobed or toothed 



1. O. acanthium (Linn.) : stem erect, branching, somewhat woolly ; leaves 

 decurrent, sinuate, spinose-toothed, tomentose on both sides ; scales of the 

 involucre linear-subulate ; the exterior spreading, woolly at the base. DC 

 —Engl. hot. t. 977 ; Bigel. fl. Bost.ed. 2. p. 293 ; DC. prodr. 6. p. 618. 



Waste grounds and dry pastures ; introduced from Europe, and natural- 

 ized in the New England States ! July-Aug.— (D A tall cottony plant, 

 called Cotton Thistle. 



174. LAPPA. Tourn. inst. t. 156 ; Juss. ; Lam. ill. t. 665 ; DC 

 Heads many-fl, 

 globose; the imbi 



