BIGNONIACE^. (BIGNONIA FAMILY.) 277 



*-* *- Corolla violet-purple. 



8 U. ptirpurea, Walt. (PUBPLE BLADDERWORT.) Leaves whorled 

 along the long immersed free floating stems, petioled, decompound, capillary, 

 bearing many bladders; flowers 2-4 (' wide) ; spur appressed to the lower 

 3-lobed 2-saccatc lip of the corolla and about half its length. Ponds, Maine to 

 Virginia, and southward. Aug., Sept. Scape 3'- 6' high, not scaly below. 

 * * * Scape solitary, slender and naked, or with a few small scales, the base rooting in 

 the mud or soil: leaves small, awl-shaped or grass-like, often raised out of the water, 

 commonly few or fugacious : air-bladders few on the leaves or rootlets, or none. 

 *- Flower purple, solitary : leaves bearing a few delicate lobes. 



9. U. resilpiliata, Greene. Scape (2' -8' high) 2-bracted above ; leaves 

 thread-like, on delicate creeping branches ; corolla (4" -5" long) deeply 2-parted ; 

 spur oblong-conical, very obtuse, shorter than the dilated lower lip and remote 

 from it, both ascending, the flower resting transversely on the summit of the scape. 

 Sandy margins of ponds, Maine (Mr. Chute), E. Massachusetts, and Khode 

 Island. Aug. 



-i- -H- Flowers 2-10, yellow : leaves entire, rarely seen. 



10. U. Sllbulata, L. (TiNr BLADDERWORT.) Stem capillary (3'- 

 5' high) ; pedicels capillary ; lower lip of tlie corolla fiat or with its margins re- 

 curved, equally 3-lobed, much larger than the ovate upper one ; spur oblong, acute, 

 straight, appressed to the lower lip, which it nearly equals in length. Sandy 

 swamps, pine-barrens of New Jersey, Virginia, and southward. June. Co- 

 rolla 3" -4" broad. 



11. U. eoi'iiilta, Michx. (HORNED BLADDERWORT.) Stem strict 

 (^ - 1 high), 2 - 10-flowered ; pedicels not longer tha.n the calyx ; lower lip of the 

 corolla large and helmet-shaped, its centre very convex and projecting, while the 

 sides are strongly reflexed ; upper lip obovate and much smaller ; spur awl-shaped, 

 turned downward and outward, about as long as the lower lip. Peat-bogs, or 

 sandy swamps ; common. June -Aug. Flowers close together, large. 



2. PINOUICUJLA, L. BUTTERWORT. 



Upper lip of the calyx 3-cleft, the lower 2-cleft. Corolla with an open hairy 

 or spotted palate. Small and stemlcss perennials, growing on damp rocks, 

 with 1 -flowered scapes, and broad and entire leaves, all clustered at the root, 

 soft-fleshy, mostly greasy to the touch (whence the name, from pinguis, fat). 



1. P. vulgaris, L. Leaves ovate or elliptical ; scape and calyx a little 

 pubescent; lips of the violet corolla very unequal, the tube funnel-form, spur 

 straightish. Wet rocks, W. New York to Lake Superior, and northward 

 July. v "(Eu.) 



ORDER 72. BIGNONIACE^E. (BIGNONIA FAMILY.) 



Woody or rarely herbaceous plants , monopetalous, didynamous or dian- 



drouSj with the ovary commonly 2-cetted by the meeting of the two placenta? or 



of a projection from them, many-seeded : the large seeds with a jlat embryo 



and no albumen. Calyx 2-lipped, 5-cleft, or entire. Corolla tubular or 



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