LENTIBULARIACEAE. 



VOL. III. 



2. Pinguicula vulgaris L. Common Butter- 

 wort. Bog Violet. Fig. 3859. 



Pinguicula vulgaris L. Sp. PI. 17. 1753. 



Scapes glabrous or nearly so, i'-6' high, little if 

 at all elongating in fruit. Leaves 3-7, the blades 

 ovate to elliptic, obtuse, i'-ii' long, the margins 

 usually inrolled; calyx ii"-2j" long, the lobes ob- 

 tuse, the 2 lower ones more or less united ; corolla 

 violet-purple, /'-lo" long including the subulate 

 acute spur, 2-lipped, the lips equally spreading, the 

 upper 2-lobed, the lower 3-lobed; capsule ovoid, 

 3"-4" long, 2i"-3" in diameter. 



On wet rocks or gravelly places, circumpolar ; south- 

 ward in America to Newfoundland, New Brunswick, 

 Vermont, northern New York, Michigan, Minnesota, 

 Montana, and British Columbia. June-July. Bean- 

 weed. Yorkshire sanicle. Sheep-root or -rot. Rot-grass. 

 Sheepweed. Steep or earning-grass, from its use in 

 curdling milk. 



Pinguicula alpina L., reported from Labrador on 

 account of a single specimen said to have been col- 

 lected there many decades ago, probably does not occur 

 in North America. It has flowers about the size of 

 those of P. vulgaris, but nearly white and with a very 

 much shorter obtuse spur. 



2. VESICULINA Raf. Fl. Tellur. 4: 109. 1838. 



Aquatic herbs, with horizontal submerged stems, the branches verticillate, and verticil- 

 lately or oppositely decompound. Leaves, at least in the adult plant, none. Bladders terminal 

 on the ultimate branches, the mouth naked or with a single median hairy proboscis. In- 

 florescence racemose, i-4-flowered; scales on the lower portion of the scape none; pedicels 

 from the axils of bracts, without bractlets, erect in fruit. Calyx 2-lobed, the lobes herba- 

 ceous, concave. Corolla strongly 2-lipped, the upper lip not lobed, the lower lip 3-lobed, the 

 lateral lobes saccate and together constituting a prominent 2-lobed palate, the middle lobe 

 flat, comparatively inconspicuous. Anthers not lobed. Capsule many-seeded. Seeds tuber- 

 culate. [Latin, vesicula, a little bladder.] 



About 6 species, confined to the New World. Type species : Utricularia saccata LeConte. 



i. Vesiculina purpurea (Walt.) Raf. 

 Purple Bladderwort. Fig. 3860. 



Utricularia purpurea Walt. Fl. Car. 64. 1788. 

 U. saccata LeConte ; Ell. Bot. S. C. & Ga. i : 21. 1816. 

 Vesiculina saccata Raf. Fl. Tellur. 4: 109. 1838. 

 Vesiculina purpurea Raf. loc. cit. 1838. 



Stems i-3 long, the internodes i'-2' long, the 

 primary branches in whorls of 5-7, verticillately 

 decompound. Leaves none; bladders i"-ii" long, 

 without bristles, the exterior surface of the valve 

 with a central tuft of glandular hairs; scape 2'-6' 

 high, 2-4-flowered ; bracts membranaceous, basally 

 attached, or more commonly with a free portion 

 below the line of insertion ; pedicels 3"-4" long, 

 half longer in fruit; calyx-lobes subequal, \\" 

 long ; corolla red-purple, the upper lip subrhom- 

 boid, about 4" long and 6" broad, concave, the 

 lower lip 4"-6" long and broad, with a yellow 

 spot at the base; spur conic, appressed to and 

 shorter than the lower lip; capsule li" in diam- 

 eter ; seeds numerous, minute, tuberculate-spiny, 

 especially toward each end. 



In ponds, Maine to Florida and Louisiana, near 

 the coast, also Michigan and Indiana to Minnesota. 

 Hooded or horned milfoil. July-Sept. 



3. UTRICULARIA L. Sp. PI. 18. 1753. 



Aquatic herbs, with horizontal submerged leafy stems. Leaves alternate, dissected, some- 

 times root-like, 2-8-parted from the very base, and thus often appearing opposite or verti- 

 cillate, the segments dichotomously or pinnately dissected, some or all of them bladder-bearing. 

 Bladders with a pair of bristles and more or less other armature about the mouth. Inflores- 

 cence racemose, the raceme sometimes reduced to a single flower ; scales on the lower portion 

 of the scape, when present, basally attached, sometimes replaced by a whorl of inflated 



