452 



BOTANY 



herbaceous (most Gentianaceae) or woody shrubs or trees e.g. Oleander, Ash, 

 Lilac. The most important families are the following: Oleaceae, tlie Olive 

 family, including the Lilac (Syringa), Ash (Fraxinus), Jasmine. The Gentian- 

 acese are all herbaceous plants, of which the various species of Gentian (Fig. 

 441, E) are familiar examples. The Apocynacese include the species of Dogbane 

 (Apocynum) and various showy cultivated plants e.g. Oleander (Nerium), 

 Periwinkle (Vinca). The last family, Asclepiadaceae, is represented by several 

 native species of Asclepias, or Milkweed, some of them showy plants well 

 worthy of cultivation. 



Order V. Tubiflorae 



The order Tubiflorse is a large one and includes many familiar sympetalous 

 flowers. The flowers may be isocarpous, but more commonly, as in the Contort*, 

 the number of carpels is reduced, and this may be true of the stamens as well, 



FIG. 442. A-C, Phlox, divaricata. D, Hydrophyllum appendiculatum. 

 E-G, Cynoglossum offidnale. 



especially in such zygomorphic types as the Labiatae and Scrophulariaceae. The 

 corolla is always markedly sympetalous, and the tubular corolla, characteristic 

 of most of them, gives the name to the order. The stamens are always in- 

 serted on the corolla-tube, and the flowers are in all cases hypogynous. The 

 more primitive types (Fig. 442) e.g. Convolvulus, Phlox, Hydrophyllum 



