GENUS 3. BLADDERWORT FAMILY. 227 
floats; pedicels from the axils of basally inserted but sometimes auriculate bracts, without 
bractlets. Calyx 2-lobed, the lobes concave, herbaceous, usually spreading under the mature 
capsule. Corolla strongly 2-lipped, the palate at the base of the lower lip, prominent, usually 
2-lobed. Anthers not lobed. Capsule few-many-seeded. Seeds more or less peltate, flat- 
topped, the margin variously winged or wingless. [Latin, utriculus, a little bag.] 
About 75 species, of world-wide distribution. Besides the following, 2 or 3 others occur in 
the southeastern United States. Type species: Utricularia vulgaris L. 
Scape without floats. 
Stems creeping on the bottom in shallow water; some or all of the leaves root-like. 
Spur and palate conspicuous; pedicels ascending in fruit. 
Segments of leaves all capillary; lips of corolla nearly equal in length. 
Spur stout, conic, shorter than the lower lip. 1. U. gibba. 
Spur slender, equalling or exceeding the lower lip. 
Spur tapering from base to apex; leaves all alike, BIRSdee-HeaTiae | scapes 2’-5’ 
high. U. pumila. 
aces Laan at base, linear above; leaves not all Bisdiee earn scapes 4’-16' 
1 U. fibrosa. 
Segments SE some leaves linear, flat, bristly-serrulate; upper lip of ee about half 
length of lower lip. U. intermedia. 
Spur a mere sac; palate obsolete; pedicels recurved in fruit., 5. U. minor. 
Stems free-floating, except fora single point of attachment. 
Scapes 2-5-flowered, without scales; cleistogamous flowers also present. 6. U. geminiscapa. 
Scapes 6-25 Aowerak with 1-5 scales ; cleistogamous flowers none. 7. U.macrorhiza. 
8 
9 
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Scape with a whorl of more or less united, conspicuous, inflated floats. 
Scape from floats to lowest pedicel 2’ long or less; corolla 6”—9” long. 
Scape from floats to lowest pedicel 3’ long or more; corolla 10”-12” long. 
. U. radiata. 
. U. inflata. 
1. Utricularia gibba L. Humped or Swollen- 
spurred Bladderwort. Fig. 3861. 
Utricularia gibba L. Sp. Pl. 18. 1753 
U. fornicata LeConte, Ann. Lyc. N. Yer: 1824. 
Stems creeping on the bottom in shallow water, 
radiating from the base of the scape; leaves alter- 
nate, mostly once or twice dichotomous, the seg- 
ments few, capillary, bladder-bearing. Scapes soli- 
tary, 2-4’ high, 1-3-flowered, with 1 scalc or none; 
pedicels 1-5" long, erect-ascending; calyx-lobes 
11s" long ; corolla yellow, the upper lip subtrian- 
ares 2”-3” long, 3-4" broad. the lower about 3” 
long and broad, the palate prominent, 2-lobed; spur 
conic, very obtuse, shorter than the lower lip; cap- 
sule globose, 13’-2” in diameter. 
In shallow water, Maine to Michigan, south to Flor- 
ida and Texas. June-Sept. 
2. Utricularia pimila Walt. Two-flowered 
Bladderwort. Fig. 3862. 
Utricularia pumila Walt. Fl. Car. 64. 1788. 
Utricularia biflora Lam. Ill. 1: 50. 1791. 
i: ied LeConte; Ell. Bot. S. C. & Ga. 1: 21. 
Io10, 
U. pee rornnieha Barnh. Bull. Torr. Club 25: 515. 
1808. 
Stems creeping on the bottom in shallow water, 
radiating from the base of the scape; leaves 
alternate, dichotomously divided, the segments 
capillary, bladder-bearing. Scapes solitary or two 
together, 2-5’ high, 1-4-flowered, with I-3 scales 
or none; pedicels Eu ‘-8” long, erect-ascending; 
corolla yellow, the upper lip more or less 3-lobed, 
4’-5" long, 6-7” broad, the lower 4’-5” long 
and broad, the palate prominent, a iciens spur 
slenderly conic or subulate, obtuse or emarginate, 
equalling or usually exceeding the lower lip; 
capsule globose, 13” in diameter. 
In shallow water, Massachusetts to Florida and 
Louisiana, near the coast. July—Aug. 
