282 LENTIBULACE^E. (BLADDERWORT FAMILY.) 



I- S. floribundus, Kunth. Stem at length much branched ; leaves obo- 

 vate, the lowest tufted, spreading, the others scattered ; racemes many-flowered ; 

 pedicels long, filiform, minutely bracted in the middle; capsule globose, longer 

 than the calyx ; flowers minute. Brackish marshes, Florida to Mississippi, 

 and northward. May - July. @ Plant 6' - 12' high, pale green. 



2. S. ebracteatUS, Kunth. Stem simple or sparingly branched, naked 

 above ; leaves spatulate-obovate ; racemes few-flowered ; pedicels bractless ; 

 capsule shorter than the calyx ; flowers conspicuous. Saline marshes, Florida, 

 and westward. May and June. Stem 1 2 high. 



ORDER 88. LENTIBULACEJE. (BLADDERWORT FAMILY.) 



Aquatic or marsh herbs, with entire or dissected leaves, and irregular 

 flowers. Calyx 2-lipped. Corolla 2-lipped, personate, spurred at the 

 base. Stamens 2, short, included : anthers 1-celled. Ovary free, ovoid, 

 1-celled. Ovules numerous, anatropous, inserted on the free central 

 globose placenta. Style short : stigma 2-lipped, the lower lip larger and 

 covering the anthers. Capsule globose, many-seeded, opening irregularly. 

 Embryo straight and thick. Albumen none. 



1. UTBICULARIA, L. 



Lips of the calyx entire. Throat of the corolla nearly closed by the 

 projecting palate ; the lips entire or slightly lobed, the lower one with an ap- 

 pressed or depending spur at the base. Herbs, floating in still water by means 

 of small air-bladders attached to the finely dissected leaves (or roots), or rooting 

 in damp earth, with entire leaves, and few or no air-bladders. Scapes or pe- 

 duncles 1 - many-flowered. 



* Stem floating : upper leaves whorled, on inflated petioles ; the others scattered and 

 finely dissected : flowers yellow. 



1. U. inflata, Walt. Scape 5 - 10-flowered ; corolla large ($' wide) ; the 

 lower lip 3-lobed, twice as long as the appressed conical notched spur, the upper 

 concave, nearly entire ; fruit nodding. Var. MINOR. Every way smaller ; 

 scape 2-flowered. Ponds and ditches, Florida to North Carolina, and west- 

 ward. April and May. Stem 2 long. Scape 6'- 12' high. 



* * Stem floating : leaves all scattered and finely dissected: flowers ydlow. 



2. U. VUlgaris, L. Leaves decompound ; scape scaly, 5 - 1 2-flowered ; 

 throat of the corolla closed by the prominent palate ; the lobes nearly entire, 

 with reflexed margins, longer than the conical obtuse somewhat spreading 

 spur; fruit nodding. Ponds and still water, Mississippi to North Carolina, 

 and northward. May - July. Stem 2 - 3 long. Scapes 6' - 1 2' high. Co- 

 rolla ' wide. 



3. TJ. striata, Leconte. Leaves decompound ; scape slender, sparingly 

 bracted, 5 - 6-flowered ; lips of the long-pedicelled corolla nearly equal, 3-lobed ; 



