xf'TT. lextibulartac'e.t:. 315 



Okder XCII. LENTIBULARIACE^. 



Herbs, aquatic or in wet places, often furuisbed with bladder-like 

 appendages for the capture and digestion of small organisms. Leaves 

 rosulate, or when submerged capillaeeo-multifid, sometimes obsolete. 

 Flowers yellow, purple, blue or white, irregular, hermaphrodite, on 

 1-mauy-flowered simple or sparingly branched scapes or peduncles ; 

 bracts small or ; bracteoles 2 or 0. Calyx inferior, 2-5-lobed or 

 -partite, regular or more or less 2-lipped. Corolla gamopetalous, 

 2-lipped, spurred ; upper lip usually the smaller, entire or emarginate, 

 innermost in bud ; lower lip 2-6-lobed ; tube very short. Stamens 2, 

 inserted on the base of the corolla, alternate with the lobes of the 

 lower lip ; filaments usually curved ; anthers 2-celled, the cells ovate, 

 diverging, usually transversely confluent, dehiscing longitudinally. 

 Ovary superior, 1-celled, globose ; ovules numerous (rarely few), on a 

 free basal placenta, anatropous ; style short ; stigma unequally 2-lobed. 

 Capsule 1-celled, few- or many-seeded, globose, dehiscing by 2-4 valves, 

 or circumscissile, or irregularly rupturing. Seeds minute, variously 

 shaped ; albumen 0. — Distrib. Cosmopolitan ; genera 5 ; species 

 about 200. 



1. UTRICULARIA, Linn. 



Annual or perennial herbs floating, or terrestrial in wet places or on 

 wet rocks, usually provided with bladder-like organs. Leaves in floating 

 species multifid with capillary segments, in erect or twining species 

 entire, frequently with minute bladders. Flowers in simple or branched, 

 few- or many-flowered racemes ; pedicels bracteate and often 2-bracteo- 

 late. Calyx 2-partite ; lobes entire or subeutire, often enlarged in fruit, 

 subequal. Corolla 2-lipped; upper lip entire, emargijiate or 2-fid ; 

 lower lip usuallj^ much larger than the upper, 3-6-lobed ; tube with a 

 straight or curved spur. Stamens 2 ; filaments broad ; anthers dorsi- 

 fixed, cells subdistinct or quite confluent. Ovary subglobose, 1-celled ; 

 ovules many, sessile on a central fleshy placenta, anatropous ; style 

 short ; stigma unequally 2-lobed. Capsule globose, 2-4-valved or 

 dehiscing irregularly. Seeds many, variously shaped, small ; albumen 0. — 

 Distrib. Mainly in the ti'opics of both hemispheres ; species 100 or 

 more. 



Aquatic; stolons submerged; leaves whorlecl, with capillary 

 persistent segments. 



Flowers on short pedicels ; peduncles with a whorl of 



spongy floats below the inflorescence 1. U. stellar is. 



Flowers on long pedicels ; peduncles without floats. 

 Large ; leaves 1^-3 in. long ; seeds not or scarcely 



winged 2. U.flexuosa. 



Small ; leaves rarely exceeding J in. long ; seeds with a 



broad corky wing 3. U. exoleta. 



Terrestrial ; leaves usually evanescent except in JJ. siricifula 

 (no. 10). 



Leaves more or less linear; sepals nearly equal; seeds 

 i-eticulate. 



Scales and bracts of the scape attached by their base?. 

 Scapes erect. 



Pedicels recurved in iVuit. 



y2 



