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 0; 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. J. longifolia, Ramb. (leptoceras, Rchb.); simi- 
lar, but flowers rather smaller, leaves narrowly lanceolate ; 
bogs. PP. grandiflora, Lam.; flowers larger than in vu/- 
garis, leaves ovate-lanceolate, calyx-teeth obovate or 
nearly orbicular, touching; bogs; Alps, Jura, Pyrenees. 
P. alpina, L. (Pl. 98); corolla white with yellow spots on 
the lower lip, spur short, conical; alpine bogs and wet 
rocks, not uncommon. 
2, UTRICGULARIA, Li 
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. 
