18 PLUMBAGINACE^. Statics. 



wide ; the midrib prominent, but the veins indistinct, with a small recurved mucro at the tip ; 

 the margin either flat or undulate. Scape longer than the leaves, nearly terete, striate, with 

 several lanceolate clasping scales. Flowers in a corymbose panicle, sessile, erect, usually 

 two together with a clasping bract at the base , the upper one expanding first. Calyx colored; 

 the segments minutely toothed ; the intermediate teeth sometimes wanting. Corolla pale 

 purple ; the petals spatulate. Ovary obovate, with five spreading filiform styles. 



Salt-marshes. Long Island, on the Island of New-York, and in Westchester cdunty as far 

 as the salt water reaches. August - October. The root is a valuable astringent, and is kept 

 in the shops. (See Bigelow, I. c, and Wood Sf Bache's U. S. Dispens.) 



Group 8. Ovary free, 1-2- (sometimes spuriously 4-) celled, with numerous ovules. 

 Corolla 2-Upped or irregular ; the sta7nens inserted upon its tube, and mostly 

 fewer than its lobss, or often didynamous. 



Order LXIV. LENTIBULACE^E. L. C. Rich. The Bladderwort Tribe. 



Calyx of two sepals, or unequally 5-parted. Corolla very irregular, 2-lipped, 

 personate ; the tube very short, spurred. Stamens 2, inserted on the upper 

 lip of the corolla : anthers one-celled. Ovary one-celled, with a free central 

 placenta and numerous ovules : style single ; stigma mostly 2-lipped. Fruit a 

 capsule. . Seeds without albumen. — Herbaceous plants, growing in water or 

 wet places, with the flowers on scapes. Leaves radical and entire, or sub- 

 mersed and divided into numerous root-like branches, and then usually 

 furnished with small oval air-bladders by which the plant is suspended in the 

 water. 



1. PINGUICULA. Tourn. ; Endl. gen. U95. BUTTERWORT. 



[ From the Latin, pinguis, fat ; the leaves being thick and greasy to the touch.] 



Calyx 4 - 5-parted, unequal. Corolla 2-lipped, spurred at the base underneath. Stamens 2, 

 included : filaments ascending : anthers transversely 2-valved. — Perennial herbs, growing 

 in wet places. Leaves in a radical spreading cluster, entire, fleshy, very smooth. Scape 

 naked, one-flowered. Flowers showy. 



1. PiNGUicuLA VULGARIS, Liun. Common Butterwort. 



Segments of the corolla very unequal, rounded, entire, reinless ; the stamens subulate- 



