LENTIBULACE-ffi. (BLADDERWORT FAMILY.) 275 



II. IIOTTOIVIA, L. FEATHERFOIL. WATER VIOLEI, 



Calyx 5-partcd, the divisions linear. Corolla salver-shap<d, with a short 

 tube ; the limb 5-partcd. Stamens 5, included. Pod many-seeded, 5 valved ; 

 the valves cohering- at the base and summit. Seeds attached by their base, 

 anatropous. Aquatic perennials, with the immersed leaves pectinate, and the 

 erect hollow flower-stems almost leafless. Flowers white or whitish, whorled at 

 the joints, forming a sort of interrupted raceme. (Named for Prof. Hotton, a 

 botanist of Leydcn, in the 17th century.) 



1. H. IBB II a la, Ell. Leaves dissected into thread-like divisions, scattered 

 on the floating and rooting stems, and crowded at the base of the cluster of pe- 

 duncles, which are strongly inflated between the joints ; pedicels, corolla, an- 

 thers, and style short. Pools and ditches, New England to Kentucky, and 

 southward. June. The singularly inflated peduncles are often aa thick as 

 one's finger. 



ORDER 71. LENTIBUlACEJE. (BLADDERWORT FAMILY.) 



SmaU herbs (growing in water or wet places}, with a 2-lipped calyx, and a 

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

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

 pous seeds, with a thick straight embryo, and no albumen, Corolla deeply 

 2-lipped, spurred at the base in front ; the palate usually bearded. Ovary 

 free : style very short or none : stigma 1 - 2-lipped, the lower lip larger 

 and revolute over the approximate anthers. Pod often bursting irregular- 

 ly. Scapes 1 - few-flowered. A small family, consisting mostly of tha 

 two following genera : 



1. UTRICUI.A.RIA, L. BLADDERWORT. 



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

 on the lower lip projecting, and often closing the throat. Aquatic and im- 

 mersed, with capillary dissected leaves bearing little bladders, which are filled 

 with air and 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. (Name 

 from utriculus, a little bladder.) 



* Upper leaves in a whorl on the otherwise naked scape, floating by means of large 

 bladders formed of the inflated petioles ; the lower dissected and capillary, bearing 

 little bladders : rootlets few or none. 



1. U. iiiflikta, Walt. (INFLATED BLADDERWORT.) Swimming freo ; 

 bladder-like petioles oblong, pointed at the ends, and branched near the apex, 

 bearing fine thread-like divisions; flowers 5-10 (large, yellow); the appressed 

 spur half the length of the corolla ; style distinct. Ponds, Maine to Virginia, 

 and southward, near the coast. Aug. 



* * Scapes naked (except some small scaly bracts), from immersed I ranching stem*, 

 tehifh commonly '<>/ /jw, aim) bear capillary dissfded few en furn ! jskfd with smaJl 



