164 TETRANDRIA. MONOGYNIA. cepiialanthus, 



2-partiIe.) Receptacle globose, liairy. Gen. pi. 147. 

 Nutt. Gen. 1. p. 92. Juss. p. 209. Lam. III. X. 

 LIX. Roem. b' Schult. Gen. 428. Nat. Ord. 

 RuBiACEAE Juss. Flowcrs in globose heads. But- 



ton-biish. 



C. occidenlalis L. : leaves opposite or lernate. IV Hid. 

 Sjoec. 1. p. 543. Mick. Fl.\.^.Ql. Pursh Fl.\.p.l\A. 

 Big. Bost. p. 33. Elliott SA:. 1. p. 186. Wall, Car, 

 p. 84. Roem. ^ Schult. \\\. ^. \0i. G r on. Virg. id. 

 Cold, Novth. 12. ScABiosA dendroides, &c. P tuk. Aim. 

 336. t. 77. f. 4. C mala. J 



A sAruA 4 or 5 feel high, considerably branched, with li^ht 

 sponiry wood and smooth bark. Lcavirs ovate -oblong;, acu- 

 minata;, petiolate, generally opposite, smooth. Heads of 

 fl.jwers about an inch in diameter, standing: on long peduncles 

 at the extremity of the branches. Calyx very minute; seg- 

 ments ovate, obtuse. Corolla white, ab ut half an inch I'-ng, 

 dilated towards the extremity so as to be a little infundibnli- 

 form, hairy witiiin, smooth externally; segments obtuse. Fila- 

 ments inserted into the tube of the corolla near the middle ; 

 anthers oblong, acute. Style filiform, nearly as long again as 

 the corolla. Cafisule anguiar, 2-celled ; (4-ceUed, not open- 

 ing. IVilld. PcricarfiO; se^rf solitary. Linn. 8cc.)"cplls 

 semibivalve ; exterior valve anvjular, indurated ; interior flat 

 and flexile. Seed solitary, sheathed at the top with a suberose 

 callus." M'u 1 1. 



Hab. In swamps, and in thickets on the borders of ponds and 

 rivers. July — August. 



104. DIPSACUS. L. 



Flowers in an ovate or roundish capitulum. — Com- 

 vion calyx (involucrum) many-leaved, fohaceous; y&^o- 

 per superior, of one leaf. Corolla tubular, 4-cleft. 

 Seed solitary. Receptacle conic, paleaceous. Pappus 

 cyathiform. Gen. pi. 148. Nii 1 1. Gen. I. p. 92. 

 Juss. p. 194. Lam. III. t. LVI. Roein. ^ 

 Schult. Gen. 4>05. Nat. Ord. Dipsaceae /z/5.y. 



Teasel. 



D. sylveslris L. : leaves rarely connate ; scales of the 

 receptacle straight; involucrum curved upward. IV H I d. 

 Spec. I. p. 544. Pursh Ft. I. p. 96, Eng. Bot. 1031. 

 Roem.<^ Schult. III. p. 42. 



Root biennial. Stem 3 — 4 feet high, angular and prickly. Leaves 

 oblong-lanceolate, opposite, sinuately serrate. Heads of flowers 



