EXOGEN.E THALAMIFLOR.E. 



101 



Cistus Berthelotianus. 1. A calyx and pistil, the petals and stamens having fallen 

 off. 2. A cross section of the ovary. 3. A vertical section of ovary and calyx. 

 4. A seed cut through ; the pointed end being the true apex. 



19. Droseraceae. Herbaceous plants, often covered with 

 glands. Leaves with stipulary fringes and a circinate verna- 

 tion. Peduncles circinate. Sepals imbricate. Petals 5, hy- 

 pogynous. Stamens distinct, either equal in number to the 

 petals, or 2, 3, or 4 times as many. Styles 3-5. Capsule of 

 3-5 valves. Embryo in fleshy or cartilaginous albumen. 



USES. The herbage of some Droseras is acrid. The bulbs 

 of others abound in a rich purple dye, and are filled with 

 starch, which renders them eatable. It is probable that 

 many species would prove of value to dyers. 



TYPICAL GENERA. Drosera, Dionsea. 



20. Tamaricacea. Shrubs or herbs, with rod-like branches. 

 Leaves alternate, resembling scales. Calyx 4- or 5-parted, 

 persistent. Petals withering. Stamens definite, distinct, or 

 monadelphous. Stigmas 3. Capsule 3-valved, 1-celled, many- 

 seeded. Seeds ascending, comose ; embryo straight. 



USES. Ornamental bushes or trees. A sweet substance 

 resembling Manna oozes out of the stem of Tamarix Gallica, in 

 hot, dry countries. The bark is bitter, astringent, and tonic. 

 A very astringent gall, employed in medicine and dyeing, in 

 India, i.s yielded by some oriental species. 



TYPICAL GENERA. Tamarix, Myricaria. 



