SECT. II 



PHANEROGAMIA 



523 



The Cistaceae constitute a small, chiefly Mediterranean family of woody, or 

 more rarely herbaceous plants, with simple leaves ; e.g. the European Rock Rose, 

 Helianthemum vulgare, a small undershrub with yellow flowers, found growing, 

 like other Cistaceae, in dry, sunny situations (Fig. 484). 



Family Droseraeeae. — Flowers actinomorphic, with five stamens ; 

 ovary usually unilocular, with parietal placentae, STYLE DIVIDED. 

 Fruit a capsule ; seeds with endosperm. Herbs, with irritable, 



GLANDULAR CILIATED LEAVES. 



—Jl 



7lt 



Fig. 4S4. — Heliantlieimim vulgare (nat, 

 size). (After Wossidlo.) 



Fig. 4S5. — Floral diagram of Fig. 486. — Viola tricolor. A, Eutire plant (reduced) ; B, a 

 Viola. stamen, enlarged ; C, gynoecium, enlarged ; D, transverse 



section of ovary ; E, fruit (nat. size). — Officinal. 



The Droseraeeae are widely distributed, and are all carnivorous plants, e.g. 

 Drosera rotundifolia, Sundew, growing in boggy ground (cf. p. 215). 



The families Nepenthaceae and Sarraceniaceae are regarded as allied to the 

 Droseraeeae, and comprise likewise carnivorous plants ; their leaves are wholly or 

 in part modified into pitchers (ef. p. 216). 



Family Violaeeae. — Flowers actinomorphic, or more frequently 



