318 LENTIBULACE^, (bLADDKUWORT FAMILY.) 



free : style very short or none : stigma 1 - 2-lipped, the lower lip larger 

 and with a prominent palate. Tod often bui-sting irregularly. Scapes 

 1 -few-flowered. — Consists mostly of the two following genera: — 



1. UTRICULARIA, L. Bladdekwort. 



Lips of tlic 2-])artcd calyx entire, or nearly so. Corolla personate, the p.alate 

 on the lower 11]) projectin},^ often closing: the throat. Anthers eonvcri^ent. — 

 Aquatic and ininicrsed, with capillary di.ssectcd leaves bearing little bladders, 

 which are filled with air and float the plant at the time of flowering; or rooting 

 in the mud, and sometimes with few or no leaves or bladders. Scapes 1 - few- 

 flowered ; usually flowering all summer. (Name from iitriculus, a little bladder.) 



* Upper leaves in a ivhoH on the otherwise naked scape, floating by means of large 



bladders formed of the inflated petioles ; the lower leaves dissected and capillarij, 

 bearing little bladders: rootlets fow or none. 



1. U. inflata, Walt. (Inflated Bladdeuwort.) Swimming free; 

 bladder-like imtioles oblong, pointed at the ends, and branched near the apex, 

 bearing (iuc thread-like divisions ; flowers .')- 10 (large, yellow) ; the appresscd 

 spur half the lengtli of the corolla; style distinct. — Ponds, iMaiiiu to Virginia, 

 and southward, near the coast. 



* * Scapes naked (except some small srnli/ bracts), from immersed branching stems, 



which commonlij swim free, and bear capillarij dissected- leaves furnished ivith 

 small air-bladders on their lobes: roots few and not affixed, or none. [Mostly 

 perennial, projiagated from year to year by a sort of buds.) 

 +- Flowers all alike, ydloiv, seveml in a raceme: pedicels nodding in fruit. 



2. U. vulgaris, L. (Greater Bladderwort.) Immersed stems (1°- 

 3° long) crowded ivith 2-3-pinnittfly many-parted capillary leaves, bearing many 

 bladders; scapes 5 - 12-flowered (6' -12' long) ; corolla closed (6"- 9" broad, the 

 sides reflexcd ; spur conical, rather shorter than the lower lip, thick and blunt 

 in the European and the high northern plant; in the common Var. Americ.Vna 

 (U. macrorluza, LeContc), less thick and rather acute. — Common in ponds and 

 slow streams. (Eu.) 



3. U. minor, L. (Smaller B.) Leaves scattered on the thread-like im- 

 mersed stems, 2-4 times /w/ar/, short ; scapes weak, 2 - 8-flowcred (3' - 7' high ) ; 

 upper lip of the gapgtg corolla not longer than the depressed ])ahite : spur very short 

 and blunt, or almost none. — Shallow water, Rhode Island to Illinois and north- 

 ward. — Corolla 2" - 3" broad. (Eu. ) 



•*- -t- Flowers of 2 sorts ; viz. the usual .'<ort (3- 7) in a raceme, their pedicels ascend- 

 ing, the corolla yellow ; and more fertile ones solitary and sraltertd along the hafy 

 Stems, on short .soon refle.red pednnrb s, fruiting in the bud, the roiolla. minute and 

 never expanding. 



4. U. clandestina, Nutt. Leaves numerous on the slender immersed 

 stems, several times forked, capillary, copiously bladder-bearing ; scapes slen- 

 der (3'-.')' high) ; lips of the corolla nearly equal in length, the lower broader 

 and 3-lobed, somewhat longer than the ajjproximatc thick and blunt sj)ur. — 

 Ponds, E. New England, W. New York, and New Jersey. 



