LENTIBULACE.E. (bLADDERWORT FAMILY.) 301 



Order 87. LENTIBULACE^E. (Bladderwort Family.) 



Aquatic or marsh herbs, with entire or dissected leaves, and irregu- 

 lar 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, open- 

 ing irregularly. Embryo straight and thick. Albumen none. 



1. UTRICULARIA, L. Bladderwort. 



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

 ing palate ; the lips entire or slightly lobed, the lower one with an appressed 

 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 floatiiifj : upper leaves lohorled, on injiated petioles ; the others scattered 

 and Jinelij dissected : Jiowers j/elloiv. 



1. U. inflata, Walt. Scape 5 - l O-flowered ; corolla large (f wide) ; the 

 lower lip .'3-lobed, twice as long as the appressed conical notched spur, the up- 

 per concave, nearly entire ; fruit nodding. — Var. minor. Every way smaller ; 

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

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



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



2. TJ. vulgaris, L. ? Leaves decompound ; scape scaly, 5- 12-flowe red; 

 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. May -July. Stem 2° -3° 



long. Scapes 6' -12' high. Corolla Y wide. 



3. U. striata, Leconte. Leaves decompound ; scape slender, sparinjjly 

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

 the upper one concave, striate in the middle, the lower with reflexed margins, 

 as long as the linear nearly appressed notched spur ; palate dotted with brown. 

 — Still water, Florida, and northward. Sept. — Scapes 10' high. Corolla Y 

 wide. 



4. IT. biflora, Lam. Small: leaves short, sparingly divided, root-like; 

 scape 1-3- (mostly 2-) flowered, almost bractless ; lips of the small (4" -.5")' 

 corolla equal, roundish; the upper one slightly 3 lobed; the lower entire, 

 rather shorter than the subulate appressed spur ; palate globose, 2-lobed. — 

 Ponds, Florida to South Carolina. May -June —Stem 4'- 6'' long, with 

 clustered branches. Scape 2' -4' high. 



5. U. fibrosa, Walt. Scape filiform, 1-3-flowered; pedicels long and 

 slender; upper lip of the corolla slightly 3-lobed ; the lower entire, as long as 

 the conical obtuse spur. — Miry margins of ponds. Sept. — Scape 4'- 10' 

 high. Corolla 6" - 8" widQ. 



