510 Obdeb 81.— LBNTIBULACB^. 



a Flowers yellow. Leaves (2-ranked) and bladders on separate branches. JTo. 3 



a Flowers yellow. Leaves (capillaceoiis) bearing the bladders (b). 



b Spur aonto or notched, about as long as the lips Nos. 4 to 



b Spur obtuse, short. Flowers of 2 kinds, the lipless down on the stems No. T 



b Spur obtuse, short. Pedicels all on the scape,— erect in fruit Nos. 8,9 



— recurved in ft-uit Nos. 10, 11 



17. infl^ta Walt. Upper Ivs. in a whorl of 5 or 6 at the surface of the water; 

 petiole and midvein inflated, lower Ivs. capillaoeous, dissected, submerged ; scape 

 4 to 5-flowered. — If In ponds, Me. to Fla. "W. to Ohio. The proper stem '(rhiz- 

 ome) is very long, branching, suspended in the water by innumerable minute air 

 bladders, and the 5 or 6 involucrate, hollow Ivs., which are many-cleft at the end. 

 Fls. 4 or 5 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 17. piirpiirea "Walt. St. long, floating, branched; Ivs. submersed, flbrillous, 

 verticillate, pinnately dissected, segments capillary, utrioulato ; scape assurgent, 

 2 — 3-flowered upper lip roundish-truncate, lower lip larger, its lateral lobes oucul- 

 late, smaller than the central ; spv/r conical, flattened, appressed . to and shorter 

 than the upper lip. — ® Pools, Me. to Fla. W. to Wis. Eeadily Ifnown by the 

 large, bright, purple fls. Stem 1 — 3f. long. Leaves about IJ' long. 'Utricles 

 small. Scape 3 — 5' high. Corolla 8" broad, the spur 3", greenish. Aug. 



3 T7. intermedia Hayne. Lvs. all submersed, in 2 rows, alternate, dichotom- 

 ously many-parted, segm. rigid, linear-subulate, ciliate-denticulate ; leafless 

 branches bearing all the bladders and terminal bulblets ; scapes 2 to 3-flowered, 

 upper lip entire, twice as long as the palate ; spur conical, acute ; ped. of the 

 fruit erect. — Swamps, Can. and N. States to Wis. Scape 4 to 8' high. Leaiy 

 stems 3 to 6' long, and the leaves about 3" (in our specimens). Jn., Jl. 



B 1 RoBBmsii. Leaf-segments linear-setaceous, flaccid, entire, 8 to 12" long ; 

 Bcaps tall (7 to 12'), 3 to T-flowered ; spur fusiform, acute, nearly as long as 

 the lower lip. — Swamps, Uxbridge, Northbridge, Mass. (Eobbins).-!-Qmt6 

 unlike the preceding in its leaves and spur. 



4 17. striata Le Conte. Lvs. numerously subdivided, submerged, capillary, bear- 

 ing the bladders, or vesicles ; scape 2 — 6-flowered, with a lew scales ; ftmiers 

 large, upper lip broad, divided irlto 3 lobes, the middle lobe striate with red, lower 

 lip crenate, sides reflexed, having dark spots upon the palate ; spar slender, ob- 

 tuse, with a notch at the end, pressed against the lower lip of the corolla and 

 nearly as long. — '^ Swamps, L. Isl. to Fla. Root submerged, slightly attached 

 to the mud. Leaves (radicles ?) few, capillary, appendaged with few air vessels. 

 Scape a foot higli, generally with 2 flowers. June. 



5 IT. longirostris Ell. Lvs. submersed, dichotomously divided, segm. setace- 

 ous, bearing the vescicles ; scapes 1 to 2-flowered ; upper lip slightly 3-lobed, 

 lower entire; spur linear- subulate, ascending, emarginate at apex, longer than the 

 lower lip. — Stagnant pools, S. Car. to Ma. Scape 3 to 5' high. Fls. yeUow, 

 middle size. Jn. 



6 T7. biflora Lam. Irregularly whorled, capillaoeously divided, root-like, bladder- 

 bearing ; scape slender, 2 to 3-flowered, pedicels many times longer than the 

 bract or cdlyx ; spur straight, oblong, acute, appressed to the corolla, and of equal 

 length ; fr. erect. — Ditches, S. Car. and Ga. Scape 3 to 4' high, pedicels 3 to 4". 

 May, Jn. 



7 XT. olandestina Nutt. Lvs. all submersed, capillaceous, multifid, bladder- 

 bearing ; fls. 2 or 3 on the slender scape, also solitary on slender, axillary pedi- 

 cels among the lvs. on the stem, the latter apetalous, fertile ; spur very obtuse, 

 shorter than the 3-lobed lower lip. — Ponds, Mass. (Robbins) to N. J. Sts. almost 

 capillary, 6' to 2flong, with many bladders. Scape 3 to 4' high (seldom seen), 

 with corollas expanding about 3 . Cauline pedicels 6 to 1" long, the cor. tubu- 

 lar, never opening. Jl. 



8 V. gibba L. (and Le Conte). Minute, floating, with hair-like lvs. and few 

 utricles ; scape 1 to 2-flowered, naked ; segm. of the yellow cor. roundish, upper 

 Up emcwginate, lower subtrilobate, middle lobe crenate, subrevolute j spur gibbous 

 (that is), very short aud obtuse. — 4 ^^ pools, R. I. (Olney), Mass., N. T. to 



