bignoniacejB. (bignonia fXmilt.) 277 



■H. ++ Corolla viotet-fnirple. 



8. U. purpurea, Walt. (Purple Bladdebwokt.) Leaves whorled 

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

 bearing many bladders; flower8 2-4 (J' wide) ; spur appressed to the lower 

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

 Virginia, and southward. Aug., §ept. — 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 smaU, 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. 

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



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

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

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

 from it, both Ascending, the flower resting transversely dn tlve summit of tlio scape. 

 — Sandy margins of ponds, Maine {Mr. Chute), E. Massachusetts, and Bhode 

 Island. Aug. 



■I- 1- Flowers 2 - 10, ydlow : leaves entire, rarely seen. 



10. U. subulata, L. (Tint Bladdebwoet.) Stem capillary (3'- 

 5' high) ; pedicds 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-barrens of New Jersey, Virginia, and southward. June. — Co- 

 rolla 3" - 4" broad. 



11. IT. cornuta, Michx. (Hobned Bladdebwoet.) Stem strict 

 (J°-l° high), 2-10-flowered; pedicels not longer than the calyx ; lower lip of tlie 

 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 aad oatwtard, about as long as the lower Up. — Peat-bogs, or 

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



2. PlUfGUicUIiA, L. BuTTEKwoBT. 



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 l-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. Iieaves 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.) 



Ordek 72. BIGNONIACEjE. (Bignonia Family.) 



Woody \ir rarely herbaceous plants, monopetcdous, didynamous or dian- 



drous, mill the ovary commonly 2-celled by the meeting of the two placent(B 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 



24 



