LENTIBULARIACE^ 95 



bog plants with insectivorous habit, belonging to the 

 colder parts of the globe. 



I. PiNGUICULA, Tourn. 



Flowers solitary, on leafless stalks ; corolla ringent, 

 spurred; calyx unequally 5 -cleft; stem o; leaves all 

 radical, in rosettes, succulent, entire, with incurved mar- 

 gin and numerous capitate glands. The species of 

 Butterwort are all bog plants. The glands on the upper 

 surface of the leaves exude a viscid secretion, by which 

 insects are detained, and the softer parts of their bodies 

 digested, as in a stomach. 



P. vulgaris^ L. ; corolla violet, with a long spur, calyx- 

 teeth obovate-lanceolate, spreading, leaves ovate-lanceo- 

 late, very succulent ; bogs, especially at a high elevation, 

 common. P. longifolia^ Ramb. (leptoceraSy Rchb.) ; simi- 

 lar, but flowers rather smaller, leaves narrowly lanceolate ; 

 bogs. P. grandifloray Lam. ; flowers larger than in vul- 

 gariSy leaves ovate - lanceolate, calyx-teeth obovate or 

 nearly orbicular, touching ; bogs ; Alps, Jura, Pyrenees. 

 P. alpinUy L. (PI. 98) ; corolla white with yellow spots on 

 the lower lip, spur short, conical; alpine bogs and wet 

 rocks, not uncommon. 



2. Utricularia, L. 



Flowers solitary or in spikes or racemes, yellow ; calyx 

 2-partite; corolla personate; leaves (in the European 

 species) divided into linear segments and furnished with 

 minute bladders. All the European species of Bladder- 

 wort are aquatic plants with submerged leaves and hand- 

 some flowers appearing above the surface of the water. 



