Class X. Order V. Ill 



The inflated, bladder-like calyx at once distinguishes this 

 plant from every thing about it. Radical leaves spatulate, stem 

 leaves opposite, ovate, acute, entire. Stems one or two feet 

 high, smooth, panicled. Flowers nodding. Calyx oblong- 

 spherical, thin, elegantly veined. Petals white, spreading, bi- 

 fid. About fences and waysides. July. Perennial. 



FENTJ1GYNU. 



137. PENTHORUM. 



PENTMORUM SEDOIDES. L. Penthorum. 



The only species of its genus. Stem about a foot high, 

 angular. Leaves alternate lance-oval, serrate, acute, green on 

 both sides. Flowers terminal, in a few revolute spikes, of a- 

 greenish yellow. Capsule with five beaks at top. Wet ground, 

 brook sides, Sec. July. Perennial. 



138. CERASTIUM. 



CERASTIUM VULGATUM. L. Mouse ear chickweed. 



Hairy, viscid, forming tufts ; leaves ovate ; pe- 

 tals equal to the calyx ; flowers longer than their 

 stalks. Sm, 



Stems spreading, round, dichotomous. Leaves ovate, op- 

 posite. Flowers from the forks of the stem, crowded at the 

 ends, on peduncles shorter than themselves. Petals oblong, 

 white, a little longer than the calyx. In cultivated ground. 

 May. Annual. 



139. SPERGULA. 

 SPEROULA AHVENSIS. L. Corn spumy. 



Leaves whorletl ; stalks of the fruit reflexed ; 

 seeds kidney shaped, angular, rough. Sm. 



A weed In corn fields, by many of our farmers denominated 



