Okdbr 81.— LENTIBULAOB^. 509 



5 ACANTHOIiOMON caiyophylldceum Boiss. (S. Echinua L.), turfy, 

 with stiff, linear, S-comered, needle-shaped, recurved Ivs. and scape, twice as high, 

 bearing a single spike. — |- From Asia. 



Order LXXXI. LENTIBULACE^. Butterworts. 



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

 Cciyx inferior, of 2 or 3 sepals. GoroUa irregular, bilabiate, personate, spurred. 

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

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

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

 men. 



G&nera 4, species 175, 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. — It In wet places. Lvs. radi- 

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



* Flowers blue Nos. 1, 2, 8. ** Flowers yoUow. No. 4 



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

 and calyx subpubescent ; cor. Kps very vAmqual, lobes obtuse, entire ; spur cylin- 

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

 chester, Dewey, Beck.) 'S. 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 unctions to the touch. CoroUa with a purple 

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



2 P. eldtior Mx. Lvs. ovate-spatulate, scape villous at base; cal. glandular- 

 puberulent ; cor. tube ventrioous, hairy within, lobes subequal, ema/rginate, ; spur 

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

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

 (scarcely 1' long in our specimens), whUe 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. ptimila Mx. Dwarf Butterwoet. Lvs. roundish-ovate, glabrous ; cor. 

 tube oblong, lobes emarginate, spur nea/rly as long as the tube, neojrly acute ; caps, 

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

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

 1" long, pale blue. Apr. 



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

 subequal, sinuate-dentate ; spur slender, a third as long as the cor. — Oar. 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. muon 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 n whorl of large, inflated petioles. No. 1 



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



a Flowers purple. Branches whorled, submersed So. 2 



