LENTIBULACE^. 252 UTRICULARIA. 



lip crenate, sides reflexed, having dark spots upon the palate ; spur slender, 

 obtuse, with a notch at the end, pressed against the lower lip of the corolla 

 and nearly as long. Native of swamps. Root submerged, slightly attached 

 to the mud. Leaves (radicles .'_> few, capillary, appendaged with few air 

 vessels. Scape a foot high, generally with 2 flowers. June. Ann. 



3. U. GIBBA. 



Floating ; scape 2 — 7-flowered ; spur shorter than the lower lip of the 

 corolla, obtuse, gibbous in the middle. In ponds. Roots dichotomous, the 

 radicles with few air vessels. Scapes 2 — 3 inches high, bearing generally but 

 2, small, yellow flowers. Spur obtuse, tumid in the middle. July. Per. 



4. U. VULGA'RIS. L. U. macvorhiza. Le Conte. 

 Floating; spur conical; stem submerged; leaves multifid, bristly; spur 



incurved ; scape few-flowered. A curious inhabitant of ditches and standing 

 waters, slightly rooting in the mud below and blossoming above the surface. 

 The root is much branched, floating by means of the vessels attached to it at 

 intervals. These vessels are oval, furnished with an aperture which is closed 

 by a valve and bearded at the margin, and are usually inflated with air. The 

 leaves (radicles.') are minute, with capillary divisions. Scape erect, rising 

 out of the water, and bearing a cluster of 5 — 9 handsome, yellow flowers. 

 Corolla personate, lower lip larger, with a projecting palate striped with 

 brown ; spur of the nectary curved upwards, striated. June, July. Per. 



Common Bladderwort. 

 6. U. purpu'rea. 



Floating ; scapes 1 — 2 flowered, axillary ; spur entire ; flowers purple, yel- 

 low within ; ca/?/z obtuse, gibbous. In ponds on mountains. Stems (root.') 

 2 — 3 feet long. Scapes 2 — 3 inches commonly 1-flowered. Upper lip trun- 

 cate ; lower lip inflated, 3-lobed. Spur short, obtuse, flattened, bending 

 upwards against the middle segment of the lower lip. The leaves, which 

 Bome consider bracts, are capillary. Aug. Purple-flowered Bladderwort. 



6. U. cornu'ta. 



Scape rooting, rigidly erect, scaly, with about 2 sessile flowers ; spur 

 subulate, acute, longer than the corolla. Native of damp, boggy soils, but 

 never floating, growing abundant in its localities. Scape 8 — 12 inches high, 

 leafless, but furnished with a few small, distant, pale, ovate scales, and bear- 

 ing at the top 2 — 3 large, yellow flowers issuing from between bracts. The 

 calyx consists of 2, ovate, colored leaves. Lower lip of the corolla much 

 larger than the upper, broad, deflexed, emarginate ; spur rigid, acute, twice 

 the length of the calyx. Jl., Aug. Per. Homed Bladderwort. 



7. S. seta'cea. 



Scape filiform, rooting, 2— 3-flowered ; upper lip of the corolla ovate, 

 revolute, entire ; the lower, deeply 3-lobed ; spur subulate, as long as the 

 lower lip, entire. Swamps. Very slender, leafless. Scape 4 — 6 inches high, 

 furnished with scales. Flowers yellow, small, the upper lip much smaller 

 than the lower. June. Per. 



8. U. PERSONa'TA. Le Conte. 



Scape rooting, many-flowered ; upper lip of the corolla emarginate, reclined ; 

 lower small, entire ; palate very large ; s/vwr linear-subulate, subacute. Bogs, 

 Scape 12 — 18 inches liigh, 4 — 10-flowered, furnished with scales. Flowers 

 yellow, rather large, spur more slender and acute than in U. cornuto. Beck. 



Snap-dragon Bladderwort. 



