SECT. II 



PHANEROGAMIA 



629 



FIG. eS5.Helianthemum vulgare (i nat. si/el. 



Family 4. Cistaceae. 

 Perennial herbs or 

 shrubs with opposite, 

 simple, stipulate leaves. 

 Pentamerous, regular 

 Mowers, with numerous 

 stamens and three or five 

 carpels united to form a 

 unilocular or multilocu- 

 lar ovary with a single 

 style. In Britain the 

 Rock Rose (Helianthe- 

 mum vulgare) ; the pros- 

 trate stem bears small 

 elliptical, sessile leaves 

 and racemes of bright 

 yellow flowers (Figs, 684, 

 685). Many species of 

 Cistus are characteristic 

 shrubs of the type of 

 vegetation of the Medi- 

 terranean region, known 

 as the Maqtiis. 



Family"). Violaceae. 



FIG. r>80. Floral diagram 

 of Viola. 



FIG. 687. Vida tricolor. A, Entire itlant (ivduced); st, stipules. 

 /;. a stamen, enlarged; c, connective: nt, nectary. C, gynae- 

 ceum, enlarged ; n, stigma. D, transverse.. section of ovary. 

 K, fruit (nat. size). 



