THE DICOTYLEDOXES 



187: 



These results are confirmed by the number of 

 seeds developed in the various examples. 



The genus Hottonia contains two species, 

 both of which are water plants with finely divided 

 submerged leaves. H. palustris (Fig. 1782) 

 (Water Violet) is widely distributed from Siberia 

 through Europe including Britain, while H. 

 inflata is found in North America along the 

 Atlantic coast. The flowers (Fig. 1783) are 

 heteromorphic, with concealed nectar secreted 

 at the base of the ovary and stored in the corolla 

 tube. Pollination is efltected mainly by two- 

 winged flies. 



Among the other genera included in this tribe 

 we may mention Soldanella, with six species 

 found in the European Alps, Dodecatheon, with 

 thirty species found in Pacific North America, 

 and Androsace, with ninety 

 species in the mountains of 

 north temperate regions. 



The Soldanellas are fam- 

 ous for their habit of thrusting 

 their flowers up through the 

 fringes of the melting snow 

 in the high Alps. The flowers 

 are pendent and are of two 

 kinds. In some species the 

 corolla is wide and bell-like 

 and in these the nectar is 

 protected by an interior ring 

 of corolla scales. In others 

 the corolla is tubular and 

 narrow and the protective 

 scales are absent. 



1 782. — Hottonia palustris. 

 Water Violet. Plant with in- 

 florescence and rosette of 

 floating leaves. 



