ORDER 81. LENTIBULACE^E. 509 



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

 with stiff, linear, 3-cornered, needle-shaped, recurved Ivs. and scape, twice as high, 

 bearidg a single spike. f From Asia. 



ORDER LXXXI. LENTIBULACELE. BUTTERWORTS. 



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

 Calyx 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- 

 men. 



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

 countries. Properties unimportant. 



1. 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-lobed ; caps, erect; seeds oo. 2 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-pube.rulent 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 6 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. ovate-spatulate, scape villous at base; caL glandular- 

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

 compressed, obtuse, about half as tong as the tube. Wet grounds, S. Car. to Fla., 

 more common in the middle districts. The Ivs. are very small proportionately 

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

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

 greenish blue? with purple 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. G-a. and Fla. to La., common in springy places. Lvs. 3 to 4" diam., 

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

 7'' long, pale blue. Apr. 



4 P. lute a Walt. Lvs. obovate. elliptic; cor. bell-shaped, palate hairy, lobes 

 subequal, sinuate-dentate : spur slender, a third as long as the cor. Car. to Fla., 

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

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



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



2. UTRICULA'RIA, L. BLADDERWORT. (Lat. utricula, a little 

 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. Scape involucrate. with a whorl of large, inflated petioles. No. 1 



Floating. Scape naked. Branches producing bulblets and bladders (a). 



a Flowers purple. Branches whorl ed, submersed No. 2 



