LENTIBULAUIACE^. (bLADDERWORT FAMILY.) 395 



bearded folds in the throat, and obovate lobes. — Damp woodlands, Nevvf. to 

 Va. and Tex., and west to the Pacific. April- July. 



2. A. fasciculatum, Gray. Scali/ stem erect and risitu/ 3-4' out of the 

 ground, mostly longer than the crowded pedunclee; divisions of the cali/x tri- 

 angular, very much shorter than the corolla, wliich has rounded short lobes. — 

 Sandy ground, L. Michigan to Minn., southward west of the Mississippi, and 

 westward. On Artemisia, Eriogonum, etc. May. 



* * Caulescent ; Jloicers densely spicate, ivith \ -2 bractlets at base of calyx; 

 corolla 2-lipped, the upper lip less or not at all 2-clefi. 



3. A. Ludovicianum, Gray. Glandular-pubescent, branched (3-12' 

 high) ; corolla somewhat curved, twice the length of the narrow lanceolate 

 calyx-lobes; the lips equal in length. (Phelipasa Ludoviciaua, Walp.) — 

 Minn, to 111. and Tex., and westward. 



4. OROBANCHE, Toum. Broom-rape. 



Flowers spicate, sessile. Calyx cleft before and behind almost or quite to 

 the base, the divisions usually 2-cleft. Corolla 2-lipped ; upper lip erect, 2- 

 lobed or emarginate, tlie lower spreading, broadly 3-lobed. Stamens included. 

 — Old World parasites, on roots of various plants. 



O. MINOR, L. A span to a foot high, pubescent, pale yellowish-brown, or 

 with purplish-tinged flowers in a rather loose spike; corolla 6" long. — Para- 

 sitic on clover, N. J. to Va. Sparingly and probably recently introduced. 



Order 77. LENTIBULAKIACE^E. (Bladderwort Family.) 



Sjnall herbs (growing in water or wet places), ivith a 2-lipped calyx, and a 

 2-lipped personate corolla, 2 stamens with (confiuently) one-celled anthers, 

 and a one-celled ovary with a free central placenta, hearing several anatro- 

 pous seeds, icith a thick straight embryo, and no albumen. — Corolla deeply 

 2-Iipped, the lower lip larger, 3-lobed and with a prominent palate, 

 spurred at the base in front ; the palate usually bearded. Ovary free; 

 style very short or none ; stigma 1 - 2-lipped. Capsule often bursting 

 irregularly. Scapes 1 - few-flowered. — The following are the two prin- 

 cipal genera. 



1. Utricularia. Calyx-lobes mostly entire. Upper lip of corolla erect. Filameuts 



strongly incurved. Foliage dissected; bladder-bearing. 



2. Pinguicula. Calyx with upper lip deeply 3- and lower 2-t'left. Corolla-lobes spreading. 



Filaments straighter. Terrestrial, with entire rosulate leaves next the ground. 



1. UTRICULAIIIA, L. Bladderwort. 



Lips of the 2-parted calyx entire, or nearly so. Corolla personate, the pal- 

 ate on the lower lip projecting, often closing the throat ; upper lip erect. 

 Anthers convergent. — Aquatic and immersed, with capillary dissected leaves 

 bearing little bladders, which float the plant at the time of flowering ; or root- 

 ing in the mud, and sometimes with few or no leaves or bladders. Scapes I - 

 few-flowered ; usually flowering all summer. Bladders furnished with a valvu- 

 lar lid and usually with a few bristles at tlio orifice. (Name from utriculus, a 

 little bladder.) 



