CLASS IV.— TETRANDKIA. 



Order 1. — Monogynia. 



5 I. OVARIUM INFERIOR. ^ 



f Monopetalous, 



129. CEPHALANTHUS. L. (Button- wood.) 

 Common calix 0; proper superior, small and 

 angular, 4-cleft. Corolla tubular, slender, 4- 

 cle'ft. Stamina exserted; stigma globose. Cap- 

 sule mostly bipartile, (2 to 4,) 2-celled, 2-seed- 

 ed; cells semibivalve; exterior valve angular, 

 indurated, interior flat and flexile. Seed soli- 

 tary, sheathed at the apex with a suberose cal- 

 lus. Receptacle globose, hairy. 



A shrub witli entire leaves, which are opposite and ter- 

 nate; producing' flowers in a pedunculate globose capitu- 

 lum. Seeds 2 io4. 



Species. 1. C. occidentalis. From Canada to Florida.; 

 near stagnant waters. The bark is considered to be a to- 

 nic. A variety, or perhaps a distinct species, with pubes- 

 cent leaves, is said by Dr. Baldwin, to exist near Ricebo- 

 rough in Georg-ia. 



Peculiar to North America; but scarcely differing- from 

 the J\anclea of India and Africa, excepting in the number 

 of its parts, which are 4 in place of 5. 



ISO. DIPSACUS. i. (Teasel.) 



Flowers collected into an ovate or roundish 

 capitulum. — Common calix many-leaved, folia- 

 ceous, (involucrum): proper superior, of 1 Uafo 

 Corolla 4i'lobQ^* Meceptaok paleaceous^ chaff ri- 



