EXOGEN^E MONOCHLAMYDE.E. 



165 



Serronia Jaborandi. 1. A cluster of flowers magnified. 2. A ripe fruit, 

 vertical section of the same, showing the seed and the position of the embryo. 



3. A 



145. Saururaceae. Herbaceous marsh or water plants. 

 Leaves alternate, with stipules. Flowers hermaphrodite. Sta- 

 mens 6, clavate, persistent. Ovaries 4, distinct, with solitary 

 ascending ovules ; or a 3- 4-celled pistil. Nuts 4, inde- 

 hiscent ; or a 3- 4-celled capsule. Embryo minute in a fleshy 

 sac or vitellus, on the outside of hard mealy albumen. 



USES. Unknown. 



TYPICAL GENERA. Saururus, Aponogeton. 



146. Salicaceee. Trees or shrubs. Leaves alternate, sim- 

 ple, with stipules. Flowers unisexual, amentaceous. Ovary 

 superior, 1-celled ; ovules numerous, erect. Fruit coriaceous, 

 1-celled, 2-valved, many-seeded. Seeds comose ; albumen 0. 



USES. Various species of Salix are the Willows from 

 whose flexible shoots wicker-work is made. S. alba is a 

 very large fast-growing tree, and its bark abounds in tannin ; 

 S. Russelliana and purpurea yield a good febrifugal bark. 

 The same property resides in Populus tremula, and other 

 species of that genus ; the young buds of Populus candicans 

 and balsamifera exude a fragrant resin used in medicine ; 

 finally, the timber of Poplars is light, clean, and very useful 

 for purposes in which hardness and strength are not required. 



TYPICAL GENERA. Populus, Salix. 



