214 ELEMENTS OF BOTANY. 



throat with a prominent palate ; stamens 2, included ; ovary- 

 free, 1-celled, ovoid, style short, stigma 2-lobed ; fruit a 

 globose, many-seeded capsule, seeds roughened. 



I. UTRICULARIA. 



Annual or perennial ; floating in still water by means of 

 numerous small air bladders attached to the finely dissected 

 leaves, or growing in wet soil with entire leaves and few or 

 no air bladders ; scapes 1-many-flowered ; calyx lips entire ; 

 corolla with the upper lip entire, the lower larger and 3-lobed, 

 the throat usually bearded within and nearly closed by the 

 palate. 



1. U. coRNUTA Michx. Horned Bladderwort. Acaulescent; 

 leaves linear and entire or none ; air bladders few or none ; scape 

 erect, stout, 2-5-flowered, 8-12 in. high; flowers yellow, fragrant, 

 I in. wide; pedicel as long as the calyx; the lips of the corolla obo- 

 vate, unequal, the lower longer, abruptly pointed, the sides reflexed, 

 as long as the horn-shaped, curved spur, throat bearded ; seeds 

 minutely pitted. May-August. In swamps and muddy places. 



2. U. suBULATA L. Small Bladderwort. Scape filiform, 

 2-6 in. high; leaves few and setaceous or none; air bladders few or 

 none; racemes zigzag, 1-6-flowered; pedicels much longer than the 

 calyx ; corolla yellow, ^ in. wide, the lower lip 3-lobed, longer than 

 the appressed, conical, green-pointed spur. February-May. Wet, 

 sandy soil. 



3.' U. inflata Walt. Swollen Bladderwort. Perennial; 

 stem very slender, floating ; lower leaves scattered, finely dissected, 

 upper leaves whorled, finely dissected ; the petioles dilated upward 

 and inflated, air bladders very numerous ; scape stout, 6-12 in. high, 

 3-10-flowered; corolla j^ellow, about f in. wide, upper lip ovate, 

 slightly lobed, lower lip 3-lobed, twice the length of the curved, 

 emarginate spur ; fruit nodding. March-June. In ponds and still 

 water. 



11. PINGUICULA. 



Perennial, acaulescent herbs ; leaves in a rosulate, basal 

 cluster, entire, margins involute, surface covered with a sticky 

 secretion ; scapes naked, circinate, 1-flowered ; calyx 2-lipped, 

 the upper lip 2-lobed, the lower 3-lobed ; corolla 2-lipped, the 



