DICOTYLEDONOUS PLANTS 209 



92. LENTIBULARIACE^:. BLADDEKWORT FAMILY. 



Scape-bearing herbs, chiefly aquatic or living in marshes. 

 Leaves are often thread-like and floating, without stipules. 

 Flowers irregular. Calyx free from the ovary, persistent. 

 Corolla hypogynous, 2-lipped, the tube short, spurred at the 

 base. Stamens 2, opposite the lateral sepals, hypogynous or 

 inserted on the corolla-tube. Ovary free, 1-celled ; style 

 short, thick, stigma 2-lipped, ovules many. Capsule 2-valved 

 or bursting irregularly, many-seeded. 



UTRICULARIA, L. 



Aquatic or terrestrial herbs, often floating and propagated 

 by buds which break loose from the plant and sink to the 

 bottom of the pond or stream during the winter. Leaves of 

 the aquatic species floating, thread-like, furnished with little 

 bladders in which animalcules are caught. Flowers often 

 rather showy, solitary, spiked or racemed. Corolla with its 

 throat nearly closed by the palate. Capsule globose, bursting 

 irregularly. 



1. U. cornuta, Michx. HORNED BLADDERWORT. Stemless. Leaves 

 linear and entire or none ; air bladders few or none. Scape erect, 

 stout, 2-5-flowered, 8-12 in. high. Flowers yellow, fragrant, f in. 

 wide. Pedicel as long as the calyx. Lips of the corolla obovate, 

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

 long as the horn-shaped, curved spur, throat bearded. Seeds minutely 

 pitted. In swamps and muddy places.* 



2. U. subulata, L. SMALL BLADDERWORT. Scape thread-like, 

 2-6 in. high. Leaves few and awl-shaped 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. Wet, sandy soil.* 



3. U. inflata, Walt. SWOLLEN BLADDERWORT. Perennial ; stem 

 very slender, floating. Leaves finely dissected, the lower ones scat- 

 tered, the upper ones whorled; the petioles dilated upward and 

 inflated, air bladders very numerous. Scape stout, 6-12 in. high, 

 3-10-flowered. Corolla yellow, about f in. wide, upper lip ovate, 

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

 emarginate spur. Fruit nodding. In ponds and still water.* 



