LENTIBULACEvE. (bLADDERWOBT FAMILY.) 275 



11. HOTT^NIA, L. Feathebfoii,. Water Violet. 



Calyx 5-parted, the divisions linear. Corolla salTer-ehaped, with a short 

 tube ; the limb S-parted. 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 Leyden, in the 17th century.) 



1. H. inflata., 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 as thick as 

 one's finger. 



Order 71. LiEATIBULACE^. (Bladdeewort Family.) 



Small herbs (^growing in water or wet places), with a 2-lipped calyx, and a 

 2-lipped personate corolla, 2 stamens with (conjluenlly) One-celled anthers, 

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

 pows seed!s, with « 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. Sfiapes 1 - few-flowered. — A small family, consisting mostly of the 

 two following genera : — 



1. UTRICIJIiARIA, L. Bladdebwobt. 



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

 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 utricidus, a little bladder.) 



* Upper leaves in « whorl on the otherwise naked scape, floating bi/ means of large 

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

 little bladders : roodetsfew or none.* 



1. IT. inflata, Walt. (Inflated Bladdebwobt.) Swimming free ; 

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

 bearing fine thread-like divisions; flowei-s 5-10 (largo, yellow) ; the appresscd 

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

 and soutliward, near the coast. Aug. 



* * Scapes naked (except sotne small scaly bracts), from immersed Irranehing stems, 

 which commonly swim free, and hear capillary diss/ried leaves fttniished with small 



