Vol. III.] 



BLADDERWORT FAMILV. 



193 



13. Utricularia gibba L 



Ulricnlaria gibba I,. Sp. PI. 18. 1753. 

 IJ.fornicala Le Conte, Ann. Lye. N. Y. i: 76. 1824. 

 U. minorToxr. Kl. N. V. 2; 21. 184.V Not L. 1753. 



Scapes filiform, i'-5' high, arising from sparing- 

 ly leafy, floating or creeping branches. Leaves 

 root -like, in the mud or just above it, usually deli- 

 cate, the divisions often only i or 2, capillary; 

 bladders few and minute, borne among the leaves, 

 the largest about '/i" long, or often none; flovpers 

 1 or 2, yellow; corolla 3"-4" broad, its lips round- 

 ed, broad, entire, or undulate, about equal; spur 

 thick, conic, ascending, gibbous at the base, ob- 

 tuse, shorter than the lips. 



In shallow water, or in mud on the borders of ponds 

 and pools. Ontario to Michigan, south to Alabama and 

 Illinois. July-Aug. 



Humped Bladdervvort. (Fig. 3354.) 



14. Utricularia biflora Lam. Two-flowered 

 Bladderwort. (Fig. 3355.) 



utricularia biflora Lam. 111. i: 50. 1791. 

 Utricularia longirostris Le Conte, Ann. Lye. N. Y. i: 

 76. 1824. 



Scapes filiform, 2'-^' high, arising from long float- 

 ing branches. Leaves scattered, their divisions few, 

 finely capillary, often copiously bladder-bearing; 

 flowers 1-3, yellow; corolla i/'-d" broad, the lips 

 rounded, nearly equal; spur narrowly oblong, blunt, 

 curved upward, equalling the lower lip. 



In shallow water on the margins of ponds. Eastern 

 Massachusetts and Rhode Island to Illinois, south to 

 Louisiana and Texas. 



2. PINGUICULA L. Sp. PI. 17. 1753. 



Acaulescent herbs, with fibrous roots, naked fi-flowered circinate scapes, and basal 

 tufted entire leaves, the upper surface covered with a viscid secretion to which insects ad- 

 here, and are captured by the involution of the sensitive leaf-margins. Calyx 4-5-parted, or 

 2-lipped, the lower lip 3-parted, the upper 2-parted. Corolla 2-lipped, the upper lip 2-cleft, 

 the lower 3-cleft; base of the corolla saccate and contracted into a nectariferous spur. Cap- 

 sule 2-valvcd or 4-valved. Seeds oblong, wrinkled or reticulated. [Latin, pinguis, fat, 

 the leaves seeming greasy to the touch.] 



About 30 species, of wide geoafraphic distribution, chiefly in temperate and cold regions. Be- 

 sides the following, 4 others are found in the southern United States. 



Scapes villous, i'-2' high; leaves oval, 3"-6" long. i. P. villosa. 



Scapes glabrous or minutely downy; leaves ovate or elliptic, \' -2' long. 2. P. vulgaris. 



I. Pinguicula villosa L,. Hairy Butterwort. 



(Fig. 3356-) 



Pinguicula villosa L- Sp. PI. 17. 1753. 



Pinguicula acutifolia Michx. Fl. Bor. Am. i: 11. 1803. 



Scapes slender, villous, i'-2' high. Leaves 3 or 4, oval, 

 obtuse, 3"-6" long, 2"-2," wide, sessile, or petioled; petioles 

 short, villous; flowers 2" broad; corolla pale violet with a 

 3'ellowish-striped throat, 2-lipped, the upper lip 2-parted, 

 the lower larger, 3-parted, the tube abruptly contracted into 

 a straight linear or oblong blunt spur I'/i"-!" long, 



Labrador and Hudson Bay to Alaska. Also in Greenland. 

 Summer. 



13 



