PHYTOLACCACEÆ. 33 
IV. RIVINA SERIES. 
Rivina (figs. 45-50) has regular hermaphrodite flowers. 
On 
the convex receptacle is inserted a calyx with four sepals more or 
less petaloid, of which one is anterior, one posterior, and two lateral; 
they are imbricated in the bud in a variable manner.’ 
internally the androceum is found. 
More 
In certain species, such as 
Rivina humilis. 

Fra. 45. 
Floriferous and fructiferous branch. 

Fra. 48. 
Longitudinal section of flower (4). 
R. humilis, levis, orientalis, &c.,° it is formed only of four stamens 
alternating with the sepals. 
In other species eight may be 
counted, as in &. octandra, and even from ten to twelve, as in 

1 Prum., Gen., 47, t. 39,3.—GÆRTN., Fruct. 
i, 375, t. 77, fig.5.—Lamx., Dict., vi. 213; IUL., 
t. 81.—Enpu., Gen., n. 5257.— PAYER, Or: 
ganog., 301, t. 62.—Moa., Prodr., xiii. sect. ii. 
10.—Solanoides T., in Act. Par. (1706), 87, 
ic. 7.—Rivinia L., Gen., n. 162.—J., Gen., 84, 
—Piercea Mi, Dict., vi. 310.—Rarin., F1. 
VOL. IV. 
Tell., n. 631.— Villamilla R. et Pav., mss. (ex 
Moa.) 
2 Sometimes the two lateral are hidden, and 
sometimes the anterior covers the lateral, which 
envelops the posterior. 
3 Sect, Piercea (Mog., Prodr., 11). 
D 
