184 Class X. Order V. 



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

 cal, thin, elegantly veined. Petals white, spreading, bifid. 

 About fences and waysides. July. Perennial. 



CUCUBALUS STELLATUS. L. Star Campion. 



Pubescent, erect ; leaves in whorls of four, oval- 

 lanceolate, acuminate. 



Petals white, about four cleft. Woods, Connecticut. July. 

 Perennial. 



PENTAGYX1A. 



190. PENTHORUM. 



PENTHORUM SEDOIDES. L. Penthorum, 



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

 lar. 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, &c. July. Perennial. 



191. CERASTIUM. 



CERASTIUM VULGATUM. L. Mouse Ear Chickweed. 



Hairy, viscid, forming tufts ; leaves ovate ; petals 



equal to the calyx ; flowers longer than their stalks. Sm. 



Stems spreading, round, dichotomous. Leaves ovate, opposite. 

 Flowers from the forks of the stem, crowded at the ends, on pe- 

 duncles shorter than themselves. Petals oblong, white, a little 

 longer than the calyx. In cultivated ground. May. Annual. 

 CERASTIUM VISCOSUM. L. Viscid Cerastium. 



Hairy, viscid, diffuse ; leaves lanceolate-oblong. 



In dry fields, &c. Introduced. May, &c. 

 CERASTIUM SEMIDECANDRUM. L. Small Cerastium. 



Hairy, viscid, flowers pentandrous, petals emarginate. 



A small species, sometimes of a reddish cast. Sandy soils. 

 Introduced. May. 



CERASTIUM ARVENSE. L. Field Chickweed. 



Leaves linear-lanceolate, obtuse, ciliate at base, pe- 

 tals twice as long as the calyx. 



