DIV. II 



ANGIOSPERMAE 



671 



(carina). The upper ends of the stamens are usually free and curve upwards, as 

 does also the style bearing the stigma. 



The genus Myroxylon is of importance on account of the balsam obtained from 

 species belonging to it. Myroxylon Pereirae is a tree of moderate height with 

 alternate, imparipinnate leaves (Fig. 708). The flowers are borne in the terminal 

 racemes and have a large vexillum, the other petals remaining narrow and incon- 



FIG. 711. Laburnum vulgare. (^ nat. size.) Poisosocs. 



spicuous. The stamens are only coherent at the base, and bear conspicuous, 

 reddish-yellow anthers (Fig. 709). The fruit is very peculiar. The ovary has a 

 long stalk and bears two ovules near the tip. One of these develops into the seed 

 of the indehiscent, compressed pod, which has a broad wing along the ventral 

 suture and a narrower wing along the dorsal suture (Fig. 710). The bell- 

 shaped calyx persists on the stalk. Genista, Sarothamnus, Lupinus, Cytisus 

 have all ten stamens united (Fig. 706 B) ; their leaves are pinnate or simple, with 

 entire margins. The Laburnum (Laburnum vulgare, Fig. 711) is one of the 

 commonest ornamental trees of our gardens and grows wild in the Alps. It has 



