Class XVI. Order VOL. 163 



cultivated grounds. Stem erect, varying greatly in height, ac- 

 cording to the soil in which the plant grows. Leaves ternatej 

 inversely heart shaped, very thin and delicate ; their common 

 petiole long and slender, without stipules. Peduncles axillary, 

 generally longer than the petioles, (in which respect the plant 

 differs from that of Willcienow,) supporting small, terminal 

 umbels of yellow flowers. Fruit beaked, erect. Flowers all 

 summer. 



POLYANDRU. 



203. MALVA. x 



MALVA ROTUNDIFOLIA. L. Round leaved Mallow. 



Stem prostrate ; leaves roundish, heart shaped, 

 obtusely five lobed. Fruit stalks bent downward. 

 L. 



Root fusiform. Stems lying upon the ground, branching. 

 Leaves roundish, somewhat reniform, crcnate, with five or sev- 

 en imperfect lobes. Petioles long, hairy. Stipules lanceolate, 

 ciliate. Flower stalks axillary, shorter than the petioles, sev- 

 eral together, hairy. Outer leaves of the calyx linear, inner ones 

 ovate. Petals purplish white, deeply emarginate. Fruit flat, 

 with numerous capsules forming its circumferei.ee, the stalks 

 commonly deflexed. In cultivated ground, about houses and 

 side walks. All summer. 



204. ALTHAEA. 

 ALTHAEA OFFICINAHS. L. Marsh Mallow. 



Leaves downy, oblong, ovate, obtusely three 

 lobed, toothed. Willd. 



This plant grows spontaneously on the marshes at South 

 Boston, and is said to be found at other places on the sea coast. 

 It is probably not originally native, but imported from Europe. 

 Root perennial, long, white. Stem erect, firm, covered with 



