Okdbb 81.— LENTIBULACELE. 500 



5 ACANTHOLOMON caryophyllaceum Boiss. (S. Echinus L.), turfy, 

 with stiff, linear, 3-comered, needle-shaped, recurved lvs. and scape, twice as high, 

 bearing a single spike. — \ From Asia. 



Order LXXXI. LENTIBULACEJE. Butterworts. 



Herbs small, growing in water or wet places, with showy, bilabiato fls. on scapes. 



Oclyx inferior, of 2 or 3 sepals. Corolla irregular, bilabiate, personate, spurred. 



Stamens 2, included within the corolla and inserted on its upper lip. Anth. 1- 



celled. Ovary 1-celled , with a free, central placenta. Style 1. Stigma cleft. 



Fruit. Capsule many-seeded. Seeds minute. Embryo straight, with no albu* 



mon. 



Genera. 4, species 175, natives of swamps, pools, and rivulets, diffused throughout nearly all 

 countries. Properties unimportant. 



i. PINGUIC'ULA, L. Butterwort. (Lat. pinguis, fat, from the 

 greasy appearance of the leaves.) Calyx 5-parted, somewhat bilabiate; 

 cor. bilabiate or rarely subregular, upper lip bifid or 2-parted, lower 

 trifid or 3-parted, spurred at base beneath ; sta. 2, very short ; stig. 

 sessile, 2-Iobed ; caps, erect; seeds co. — 2f. In wet places. Lvs. radi- 

 cal, rosulate, entire. Scapes 1-flowered, nodding. 



* Flowers blue Nos. 1, 2, 3. ** Flowers yellow No. 4 



1 P vulgaris L. Lvs. ovate or elliptic, obtuse, unctious-puberulent above, scape 

 and calyx subpubescent ; cor. lips very unequal, lobes obtuse, entire; spur cylin- 

 drical, shorter than the corolla. — Wet rocks and thin, damp soils, N. Y. (near Ro- 

 chester, Dewey, Beck.) N. to Arctic Am. (Hooker.) Scape G — 8' high, with soli- 

 tary, nodding fls. Leaves all springing from the root, fleshy, spatulate or ovate, 

 with a tapering base, fleshy and unctious to the touch. Corolla with a purple 

 tube, lined with soft hairs. Flowering early in Apr. and May. 



2 P. elatior Mx. Lvs. ovato-spatulate, scapo villous at base; cal. glandular- 

 puberulent ; cor. tube ventricous, hairy within, lobes subequal, emarginate, ; spur 

 compressed, obtuse, about half as long as the tube. — "Wet grounds, S. Car. to Fla., 

 more common in tho middlo districts. The lvs. are very small proportionately 

 (scarcely 1' long in our specimens), while the slender and bractless scape is 8 to 

 14' high. Sep. oblong, obtuse, tho 2 lower approximating. Cor. 1' to 15" long, 

 greenish bluo? with purplo lines. Mar., Apr. 



3 P. pumila Mx. Dwarf Butterwort. Lvs. roundish-ovate, glabrous ; cor. 

 tube oblong, lobes emarginate, spur nearly as long as the tube, nearly acute ; caps, 

 globous. — Ga. and Fla. to La., common in springy places. Lvs. 3 to 4" diam., 

 thin. Scapes filiform, 2 to 4' high. Fls. vary in sizo with tho plant, from 3" to 

 I 1 ' long, pale blue. Apr. 



4 P. lutea Walt. Lvs. ©bovate, elliptic; cor. bell-shaped, palate hairy, lobes 

 pubequal, sinuate-dentate ; spur slender, a third as long as the cor. — Car. to Fla., 

 common in tho low country in wet grounds. Lvs. 1' long, nearly as wide, soft, 

 yellowish green, curled, the scape about 6' high. Fls. mucli smaller than in No. 

 2, bright yellow. Spur 2 to '3" long. Mar., Apr. 



2. UTRICULA V RIA, L. Bladderwort. (Lat. uiricula, a littlo 

 bottle ; alluding to the air vessels appended to the roots.) Calyx 2- 

 parted, lips subequal ; corolla irregularly bilabiate, personate, spurred ; 

 stamens 2 ; stigma bilabiate; capsule globular, 1-celled. — Herbs aqua- 

 tic, loosely floating, or fixed in the mud. — Lvs. radical, multifid or lin- 

 ear and entire, mostly furnished with little inflated vescicles as buoys. 

 Scape erect. 



§ Floating. Scapo involucrate, with a whorl of large, inflated petioles. No. 1 



% Floating. Scape naked. Brandies producing bulblots and bladders (a). 



a Flowers purple. Branches whorled, Bubmersixl No. 2 



