LENTIBULACE^L 93 



dotted, ovate-lanceolato, pointed, cordate at the base, on lomj 

 fringed petioles. Low grounds. 



5. L. longifo'lia, Walt. (Steironema longifolium, Gray, in Ma- 

 coun's Catalogue.) Petals not streaked or dotted. Stem-leaver 

 sessile, narrowly linear, 2-4 indies long, the margins sometimes 

 revolute. Stem 4-angled. Moist soil, western Ontario. 

 4. ANAGAL'LIS, Tourn. PIMPERNEL. 



A. arven'sis, L. (COMMON PiMrERNEL.) Petals obovate, 

 fringed with minute teeth, mostly bluish or purplish. Flowers 

 closing at the approach of rain. Leaves ovate, sessile. Sandy 

 fields and garden soil. 



5. SAM'OLUS, L. WATEB-PIMPEBNEL. BROOK-WEED. 



S. Valeran'di, L., var. America'nus, Gray. Stem slender, 

 diffusely branched. The slender pedicels each with a bractlet at 

 the middle. Wet places. 



ORDER LVL LENTIBULA'CEJE. (BLADDERWORT F.) 



Small aquatic or marsh herbs, with a 2-lipped calyx and a 

 personate corolla with a spur or sac underneath. Stamens 2. 

 Ovary as in Primulacese. Chiefly represented by the two follow- 

 ing genera : 



1. UTRICULA'RIA, L. BLADDERWOBT. 



1. U. VTllga'ris, L. (GREATER BLADDER WORT. ) Immersed 

 leaves crowded, finely dissected into capillary divisions, furnished 

 with small air-bladders. Flowers yellow, several in a raceme on 

 a naked scape. Corolla closed ; the spur conical and shorter 

 than the lower lip. Ponds and slow waters. 



2. U. interme'dia, Hayne. Immersed leaves 4 or 5 times 

 forked, the divisions linear-awl-shaped, minutely bristle-toothed 

 on the margin, not bladder-bearing, the bladders being on leafless 

 branches. Stem 3-6 inches long. Scape very slender, 3-6 inches 

 long, bearing few yellow flowers. Upper lip of the corolla much 

 longer than the palate ; the spur closely pressed to the broad lower 

 Up. Shallow waters. 



3. U. COinu'ta, Michx. , with an awl-shaped spur turned down- 

 ward and outward, and the lower lip of the corolla helmet- shaped, 



