UTRICULARJA. LXXXVL LENTIBULACE^. 391 



than the corolla. Wet rocks and thin, damp soils, N. Y. (near Rochester, 

 Dcicey, Beck.} N. to Arctic Am. Hooker. Scape 6 '-8' high, with solitary, nod- 

 ding flowers. Leaves all springing from the root, fleshy, spatulate or ovate, 

 with a tapering base, fleshy and unctious to the touch. Corolla with a purple 

 tube, lined with soft hairs. Flowering early in April and May. 

 2. UTRICULARIA. 



Lat. utricula, a little bottle ; alluding to the air-vessels appended to the roots. 



Calyx 2-parted, subequal ; corolla irregularly bilabiate, personate, 

 spurred; sta. 2; stig. bilabiate; caps, globular, 1 -celled. Herbs 

 aquatic, loosely floating or fixed in the mud. Lvs. radical, multifid or 

 linear -and entire, mostly furnished with little inflated vesicles. Scape erect 

 Floating. Leaves capillaceous, multifid. Roots few or 0. Branches 

 producing turions at apex. 



1. U. INFLATA. Walt. (U. ceratophylla. MX.} Wliorled Bladderwort. 



Upper Ivs. in a whorl of 5 or 6 at the surface of the water ; petiole and mid- 

 rein inflated, lower Ivs. capillaceous, dissected, submerged ; scape 4 5-flov.'ered. 

 7J. In ponds, Mass, to Car., W. to Ohio. The proper stem (rhizomaT) is 

 very long, branching, suspended in the water by a single, irregular whorl of 5 

 or 6 floating, inflated leaves which are oblong, cleft, and pinnatifid at the end. 

 Flowers 45 together upon a scape 8' in length, pedunculated, with sheathing 

 bracts. Spur nearly as long as the corolla, appressed to the lower lip, striate, 

 emarginate. Cor. yellow, the upper lip broad-ovate, entire, lower 3 lobed. Aug. 



2. U. VULGARIS. (U. macrorhiza. Le Conte.) Common Bladderwort. 

 Lvs. all submersed, capillaceous, multind, fibrillose or setaceous ; vesicles 



numerous, small; si. or rhizoma very long, floating; scape simple, 5 11-flower- 

 ed ! spur conical, obtuse, shorter than the corolla. 7J. In stagnant pools, U. S. 

 and Can. Floating stems several feet long, very branching. Leaves very nu- 

 merous, 1' in length. Utricles furnished with a fringed, valvate aperture, 

 usually inflated. Scape 5 10' high, stout, arising out of the water. Flowers 

 alternate, showy, yellow, 5 6" long, lower lip larger, with a projecting palate, 

 striped with brown. Jn. Jl. 



3. U. INTERMEDIA. Havne. 



Las. all submersed, in 2 rows, dichotomously many-parted, without vesi- 

 cles, roundish in outline, segments ciliolate-denticulate ; lea/less branches with 

 lateral vesicles and terminal turions ; fls. few ; lips entire ; spur conical, acute, 

 appressed to the lower lip. 1\. Pools, Mass. Robbins ! R. I. Prov. Frank. Soc. 

 Floating stems branched, a foot long. Leaves about 3" long, numerous. Turions 

 much larger than the vesicles, green, scaly, producing new plants like bulbs 

 Flowers 4 5" long, sulphur-yellow. 



4. U. STRIATA. Le Conte. 



Lvs. numerously subdivided, submerged, with vesicles ; scape 2 G-flower- 

 ed, with a few scales ; flowers large, yellow, upper lip broad, divided into 3 

 lobes, the middle lobe striate with red, lower lip crenate, sides reflexed, having 

 dark spots upon the palate ; spur slender, obtuse, with a notch at the end, 

 pressed against the lower lip of the corolla and nearly as long. Native of 

 swamps, Mass, to Flor. Roqjt submerged, slightly attached to the mud. Leaves 

 (radicles 1) few, capillary, appendaged with few air vessels. Scape a foot high, 

 generally with 2 flowers. June. 



5. U. GIBBA. Linn, (and Le Conte.} 



Minute, floating, leafless 1 with few utricles and turions ; scape about 2 

 (4 7, Le C.)-flo\vered, naked, segments of the yellow corolla roundish, upper 

 lip emarginate, lower subtrilobate, middle lobe crenate, subrevolute ; spur gib- 

 bous in the middle. 7J. In pools, R. I., Olney, Mass., N. Y. to Car. Submersed 

 stems dichotomous. Scapes 23' high, generally with but 2 small, yellow 

 flowers. Spur swelling outward in the middle. Jl. 



6. U. FORNICATA. Le Conte. (U. minor. PA.) 



Sis. numerous, fibrillose-brancned, floating, utriculate ; scape naked, 1 2- 

 (lowered; upper lip of the corolla 3-lobed, central lobe incurved over the palate, 



