RUTACEÆ. 431 
imbricated calyx, with five deep divisions, and five alternate petals, 
with cucullate apex, and valvate-induplicate in the bud. The sta- 
mens are free and hypogynous, with naked filaments, and two-celled, 
Nitraria Schoberi. 

Fie. 519, Fie. 515, Fie. 520. 
Fruit (4). Floriferous branch. Long. sect. of fruit. 
introrse anthers, dehiscing by two longitudinal clefts. Very rarely 
there are but five of them alternipetalous; generally they are 
deduplicate, and each alternate stamen may be accompanied by 
Nitraria Schoberi. 

Se 
Fig. 516. Fra. 517. Fig. 518. 
Flower (5). Diagram, Long. sect. of flower. 
two lateral stamens more exterior, which seem oppositipetalous 
(fig. 517). When some of these latter are wanting, from six to four- 
teen may be counted. The gynæceum is superior, formed of ovary 
often three-celled, surmounted by a short style, with stigmatiferous 
apex divided into as many small lobes as there are cells. In the 
internal angle of these a placenta is seen supporting a descending 
ovule, with superior and interior micropyle. The fruit (figs. 519, 
520) is an elongated drupe tapering at the apex, accompanied at the 
