736 LENTIBULARIACEAE (BLADDERWORT FAMILY) 



29. SCHWALBEA [Gronov.] L. Chaff-sbed 



Calyx tubular, 10-12-ribbed, 5-toothed ; the posterior tooth much the small- 

 est, the 2 anterior united higher than the others. Upper lip of the corolla ob- 

 long, entire ; the lower little shorter, erect, 2-plaited, with 3 very short and 

 })road ebtuse lobes. Anther-cells parallel. Capsule ovate. Seeds linear, witli a 

 loose chaff -like coat. — A perennial minutely pubescent upright herb, 3-6 dm. 

 high, with leafy simple stems terminated by a loose spike of rather large dull 

 purplish-yellow flowers ; leaves alternate, sessile, 3-nerved, entire, ovate or ob- 

 long, the upper gradually reduced to narrow bracts ; pedicels very short, with 

 2 bractlets under the calyx. (Dedicated to C. G. Schwalbe, an obscure German 

 botanist.) 



1. S. americana L. — Wet sandy soil, Mass. to La., near the coast. May- 

 July. 



LENTIBULARlACEAE (Bladderwort Family) 



Small herbs (growing in icater or wet places), loith a 2-lipped calyx, and a 2- 

 lipped personate corolla, 2 stamens with (confluently) l-celled anthers, and a 

 l-celled ovary with a free central placenta, hearing several anatropous seeds, 

 with a thick straight embryo, and no albumen. Corolla deeply 2-lipped ; 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 principal genera. 



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



incurved. Foliage usually dissected, bladder-bearing. 



2. Pinguicula. Calyx with upper lip deeply 3- and lower 2-cleft. Corolla-lobes spreading. Fila- 



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



1. UTRICULARIA L. Bladderwort 



Corolla personate, the palate on the lower lip projecting, often closing the 

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

 leaves bearing little bladders, which float the plant at the time of flowering ; 

 or rooting in the mud, and sometimes with few or no leaves or bladders. Scapes 

 1-few-flowered. Bladders furnished with a valvular lid and usually with a few 

 bristles at the orifice. (Name from utriculus, a little bladder.) 



N.B. — In this genus the figures of the leaves and flowers are on a scale of |. 



» Upper leaves in a ichorl on the otherwise naked scape, floating by means of 



large bladders formed of the inflated petioles ; the lower leaves dissected and 



capillary, bearing small bladders; rootlets few or none. 



1. U. inflata Walt. Swimming free ; bladder-like petioles oblong, pointed 



at ends and branched near apex, bearing fine thread-like divisions ; flowers 3-10, 



large, yellow ; appressed spur half the length of the corolla ; style distinct. — 



In still water. Me. to Tex. , mostly near the coast. July-Sept. 



* * Scapes naked (except some small scaly bracts), from 

 immersed branching stems, ichich commonly sicim 

 free, bearing capillary dissected leaves with small 

 bladders on their lobes; roots few and not affixed, 

 or none; mostly perennial, propagated from year to 

 year by tuber-like buds. 

 •*- Cleistogamous flowers along the submersed copiously 

 bladder-bearing stems. 



2. U. clandestina Nutt. Leaves numerous on the 

 896. U. clandestina. slender immersed steins, several times forked, capillary ; 



