362 Class XXII. Order III. 



421. ACALYPHA. 



ACALYPHA VIRGINICA. L. Three seeded Mercury. 



Pubescent, leaves on short petioles, lance-oblong, 

 serrate; involucres subsessile, axillary, nerved, cut in- 

 to acute, crested segments. Mick. abr. 



An annual plant of ordinary appearance. Branches pubescent. 

 Leaves ovate-lanceolate, with a rather obtuse point, remotely 

 serrate or crenate at the edge, somewhat three nerved. Involu- 

 cres of the fruit axillary, hairy, on short stalks, their edge cut 

 into a number of long, acute, ciliated segments or teeth. 

 Woods, Cambridge. August. 



Class XXII. DICECIA. Barren and fertile flow- 

 ers on different plants. 



Order II. DIJ1NDR1A. Two stamens. 



422. VALLISNERIA. Barren flowers, spathe two- 

 parted ; spadix covered with florets ; corolla three- 

 parted. Fertile flowers, spathe cloven, one flowered ; 

 calyx three parted, superior ; corolla three petalled ; 

 stigma three parted ; capsule one celled. 



423. SALIX. Calyx scale of an ament ; corolla 

 none. In the barren flowers, from one to five stamens, 

 with a nectariferous gland at the base. In the fertile 

 flowers, two stigmas; capsule one celled, two valved ; 

 seeds downy. 



Order III. TR1AJYDRIA. Three stamens. 



424. EMPETRUM. Calyx three parted ; corolla three 

 petalled. Barren flowers, stamens from three to nine, 

 very long. Fertile flowers, styles from three to nine ; 

 berry from three to nine seeded. 



