FAMILIES OF FLOWERING PLANTS 239 
stamens 2 or 4, the anthers sometimes united. Ovary 1-celled, sur- 
rounded by glands at the base. Fruit 1-celled, dry or succulent. 
The chief interest attaching to this family lies in their value as 
ornamental plants for the greenhouse, most of them, such as Gloxinia, 
Gesnera, Achimenes, etc., take kindly to cultivation and many beautiful 
varieties have been developed from the original species. 
Family Columelliaceae. Columellia Family. Consists only of the 
genus Columellia, with several Peruvian species. They are evergreen 
shrubs related to the Gesneraceae, but the flowers are remarkable in 
having the two anthers with enormously elongated cells, which coil upon 
themselves and form a globular mass. 
Fic. 206. Greater Bladderwort (Utricularia vulgaris). After Britton and 
Brown, Ill. Fl. Northeast U. S. 
Family Lentibulariaceae. Bladderwort Family. These are marsh 
terrestrial or aquatic herbs, with perfect irregular flowers having a 2-5- 
parted calyx, and a 2-lipped corolla, the upper lip 2-lobed, the lower 3- 
lobed and spurred. Stamens 2; ovary 1-celled, capsular in fruit. There 
are 4 genera and about 180 species ; the two important genera are Uéri- 
cularia and Pingwicula. The former comprises the three bladderworts, 
most of which are immersed or floating aquatics with finely cut foliage, 
supported by small inflated bladders, and erect scapes of pink or yellow 
flowers. (See Fig. 207.) Pinguicula is common in the pine barrens of 
