216 ORDER 84. LENTIBULACE^E. 



Jar; corolla lobes obtuse, 2-lobulate ; spur half as long as the tube, blunt. S. Car. to 

 Fla. Scape very slender, 812' high. Lvs. 1' or less. Fls. V. (P. australis N.) 



3 P. pumila MX. Lvs. glabrous, roundish-ovate ; corolla tube oblong, lobes emargi- 



nate; spur acute, nearly as long as tube. Ga., Fla. 24'. Fls. 4 5" long. 



4 P. lutea Walt. Lvs. elliptic to obovate ; cor. bell-shaped, nearly regular, the lobea 



sinuate-dentate ; spur slender, as long as corolla. S. 58'. Fls. 9" broad. 



2. UTRICUIiARIA, L. BLADDEBWORT. Cal. 2-parted, lips subequal. 

 Cor. irregularly bilabiate, personate, spurred. Stamens 2. Stig. bilabiate. 

 Caps, globular, 1-celled. ? Loosely floating, or fixed in the mud. Lvs. 

 radical, multifid or linear and entire, mostly furnished with little inflated 

 utricles (whence the name) as buoys. Scape erect. June Sept. Fig. 399. 



Floating. Scape involucrat with a whorl of large inflated petioles No. 1 



Floating. Scape naked, branches bearing bulbJets and bladders. . .(a) 

 Stems creeping and rooting in mud, with few or no air-bladders. . .(6) 



a Flowers purple. Branches whorled, submersed No. 3 



a Flowers yellow. c Bladders borne on the capillaceous leaves., .(d) 



<; Bladders and leaves borne on separate branches Nos. 3, 4 



d Spur acute or retuse. about as long as the lips Nos. 67 



d Spur obtuse, short. e Fls. of 2 kinds, the lipless down on the stems No. 8 



e Fls. of 1 kind only, all on the scapes Nos. 9 11 



b Spur appressed to and scarcely equalling the lower lip of the corolla Nos. 12, 13 



6 Spur remote from the corolla, slender, acute Nos. 14, 15 



1 U. iiiilutn Walt. Upper Ivs. in a whorl of 5 or 6 at the surface of the water ; pet. 



and mid vein inflated, lower Ivs. capillaceous, dissected, submerged ; scape 4-5-flwd. 

 y. In ponds and ditches. Rhizome or stem long. Scape 8 / . Fls. 8" broad, yellow, 

 upper lip rounded, entire, lower lip 3-lobed. August. 



2 U. purpitrea Walt. Leaves all submersed, fibrillous, whorled on the long stem; 



scape assurgent, 2-3-flowered ; lower lip 3-lobed, bisaccate, longer than the conical 

 spur beneath it. (i) Ponds. Scape 3 5'. Flowers 6" broad, violet-purple. 



3 U. intermedia Hayne. Lvs. 2-ranked, crowded, 45 times forked, divisions lin- 



ear-subulate, ciliate-denticulate, rigid, 23" long ; bladders all on leafless branches ; 

 scape 2-3-flowered ; spur conical, acute ; corolla 6 8". (T) Pools, Pa., and N. 6 S'. 



4 U. Robbinsii Wood. Leaves alternate, 34 times forked, divisions flaccid, linear- 



capillary, entire, S 12" long ; bladders all on leafless branches ; scape tall (813'), 

 4-7-flowered ; spur fusiform ; corolla 4 5". (T) Mass. (Dr. Robbins.) 



5 U. striata Le Conte. Lvs. 3-4-furcate, divisions capillary ; scape 2-6-flowered, 8 



12' ; fls. 6", on slender pedicels, lips subequal, 3-lobed, the upper striate with red, 

 concave, the lower as long as the obtuse, notched spur. (T) L. I. to Fla. 



6 U. longirostris Ell. Lvs. 2-3-furcate, with setaceous segments ; scape 1-3-flow- 



ered (3 4') ; lower lip entire, shorter than the subulate spur. South. 



7 U biflora Lam. Lvs. capillary, root-like, bearing numerous bladders ; scape 2 S 7 , 



2-flowered ; spur obtuse, notched, equalling the lower lips. W. and S. 



8 U. clandestina N. Lvs. capillaceous-multifld, scattered, bladder-bearing ; scape 



slender, 3 4', 2-3-flwd., seldom seen ; cor. 5", spur shorter than the 6-lobed lower lip ; 

 ped. down on the stems 1', with 1 apetalous flower. 11 Ponds, Mass, to N. J. and Pa. 



9 U. gibba L. Minute, with hair-like leaves and few utricles ; scape 1-2-flwd., naked 



(2 3') ; corolla spur blunt (gibbous) and short, lips many-lobec. ii R. I. to Car. 



10 I/', vulgaris L. Lvs. capillaceous-mnltifid, fibrillous ; sc. scaly, 5-12-flwd., 612' ; 

 spur conical, shorter than the closed lips (34"), divergent ; fr. nodding, u Ponds. 



11 U. minor L. Lvs. short, several limes forked; sc. 3-ti-flwd., 47' ; cor. ringent, 

 spur blunt, deflesed, much shorter than the obovate, flat lower lip ; fr. nodding, ii. 



12 U. bipartita Ell. Lvs. fibrillous-multifid ; sc. 1-3-flwd., 23' ; cal. lower lip 2- 

 parted ; spur obtuse, half as long as the entire lower lip. Soft mud, South. 



