BIGNOLSIACEuE. (BIGNONIA FAMILY.) 277 



** ++ Corolla violet-purple. 

 8 U. purpurea, Walt. (Purple 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-saccate 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 ivith 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. resupinata, 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 Rhode 

 Island. Aug. 



■*- ■*- Flowers 2-10, yellow : leaves entire, rarely seen. 



10. U. Sllbuluta, L. (Tiny Bladdekwort.) Stem capillary (3'- 

 5' high) ; pedicels capillary ; lower lip of the corolla flat 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-ban-ens of New Jersey, Virginia, and southward. June. — Co- 

 rolla 3" -4" broad. 



11. U. coruuta, Michx. (Horned Bladderwort.) Stem strict 

 (£°-l° high), 2-lO-flowered; pedicels not longer than 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. PINGUECULA, L. Butterwort. 



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

 or spotted palate. — Small and stemless 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. (Eu.) 



Order 72. BIGNONIACE^E. (Bignonia Family.) 



Woody or rarely herbaceous plants, mo7iopetalous, didynamous or dian- 

 droits, with the ovary commonly 2-celled by the meeting of the two placental or 

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

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



