288 LENTIBULARIACE^. 



3. U. mi w>r Linn. : floatiog ; leaves dichotomously divided, the segments 

 linear and r eta' eous, furnished with air bladders ; scape about 2-flowered ; 

 upper Up emarg'nate, as long as the palate ; spur very short, obtuse, keeled, 

 deflexed. U. gibba Porr. Ft. not of Linn. 



Ponds and svi^aKiiM. N. Y. and Mass. June. %. — Leaves furnished with 

 air bladders. Scapt 2 -4 inches high. Flowers small, dull-yellow. 



Lesser Bladderwort. 



4. U.fornicata Le^onte: floating; scape naked, 1 — '2-flowered; upper 

 lip 3-lobed, the middJ© 'obe arched over the palate ; spur incurved, conoidal, 

 obtuse, very entire, anpressed to the lower lip of the corolla. U. minor 

 Pursh. U. gibba ElL. not of Linn. 



' Swamps and ditches. N. Y. to Geor. Aug. %.. — Root furnished with air 

 .liladders. Scape naked. Flowers few, small, yellow. Incurved Bladderwort. 



5. U, setacea Mich. : scape filiform, rooting, with 2 or more flowers ; 

 upper lip of the corolla ovate ; the lower deeply 3-lobed ; spur subulate, as 

 long as the lower lip of the corolla. U. subulata Pursh. U. pumila Walt. 



Swamps. Can. to Flor. and Louis. June. %. — Scape very slender, 4 — 6 

 inches high, furnished with scales. Flowers many, small, yellow. Upper lip 

 of the coroZfe half the size of the lower. « Setaceous Bladderwort. 



6. U. intermedia Heyne : floating ; leaves distichous, dichotomously many- 

 parted, without air bladders ; segments setaceous, spinulose-denticulate ; 

 scape 2 — 3-flowered, upper lip entire, twice as long as the palate ; spur 

 conical, acute ; capsule erect. (Z>. C) 



Swamps. Mass. Green. Jefferson county, N. Y. Gray. Arct. Amer. 

 Hook. June, July. %. — Leaves oblong, cut into numerous segments like those 

 of yarrow. The air bladders grow in separate root-like brandies. Scape 4 — 8 

 inches high. Flowers about half as large as in U. vulgaris, yellow. 



Intermediate Bladderwort. 



7. U. resupinata Greene: radical leaves resembling roots, somewhat 

 whorled, capillary, furnished with air bladders ; scape 1-flowered, erect, 

 slender ; lip cyhndraceous, obtvi^e, 4 times as long as the corolla. (Z>. C) 



Plymouth, Mass. Greene. 0? — Plant 3 — 6 inches long, slender. Flower 

 solitary, yellow ? The only description which I have seen of this species is that 

 given in De Candolle, Prod. viii. 11, from a specimen furnished by Mr. Tucker- 

 mann. Resupinate Bladderwort. 



8. U. cornuta Mich. ; scape rooting, erect, rigid ; flowers 2 — 3, sessile ; 

 upper lip of the corolla obovate, entire ; lower lip very broad, somewhat 

 3-lobed; spur very acute, projecting and dependent. 



Wet rocks. Can. to Car. W. to Lake Superior. July, Aug. %. — Scape 10 

 inches high, with minute appressed scales. Flowers yellow, approximate, nearly 

 sessile, as large as those of U. vulgaris. Sharp-horned Bladderwort. 



9. U. striata Le Conte : floating ; scape 4 — 7-flowered ; upper lip of the 

 corolla ovate-roundish, subemarginate, margin waved ; lower lip 3-lobed, 

 reflected at the sides ; spur straight, obtuse, shorter than the lower lip. U. 

 fibrosa Ell. not of Walt. 



Swamps and shallow waters. Mass. to Flor. June, July. %. — Root spar- 

 ingly furnished with air vessels. Scape nearly a foot high. Corolla large, yel- 

 low, striated with red ; spur much shorter than the lower lip. 



Striated Bladderwort. 



10. U. perso7iata Le Conte : scape rooting, many-flowered ; upper lip of 



