GENUS i. 



BLADDERWORT FAMILY. 



225 



Family 29. LENTIBULARIACEAE Lindl. Veg. Kingd. 686. 1847.* 



BLADDERWORT FAMILY. 



Aquatic plants, or if terrestrial usually on moist ground, the leaves in a basal 

 rosette, or borne along floating stems, or more or less root-like, or wanting. In- 

 florescence scapose. Flowers solitary or racemose, perfect, irregular. Calyx 

 inferior, 2-5-lobed or parted, persistent. Corolla hypogynous, gamopetalous, 

 2-lipped, the upper lip entire or 2-lobed, the lower lip entire or 3-lobed, usually 

 with a nectariferous spur. Stamens 2, borne upon the base of the corolla; anther- 

 sacs confluent into I. Ovary superior, usually subglobose, I -celled; placenta sub- 

 globose, central, free; ovules 2 or more, usually very numerous; style short or 

 obsolete ; stigma 2-lipped, the anterior lip larger, lamelliform. Fruit a capsule, 

 bursting irregularly, or dehiscent by valves. Seeds variously appendaged or sculp- 

 tured; embryo in the axis, often imperfectly developed; endosperm none. 



About 1 6 genera and 300 species, of world-wide distribution. 



Scapes without bracts or scales, i -flowered; leaves in a basal rosette. i. Pinguicula. 



Scapes with one or more bracts, with or without scales ; leaves usually alternate, often dissected 



or root-like and bladder-bearing. 

 Bracts at the base of the pedicels without bractlets ; calyx not enclosing the fruit. 



Branches verticillate, and verticillately or oppositely decompound ; lateral lobes of lower lip 



of corolla saccate. 2. Vesiculina. 



Branches alternate or none ; lateral lobes of lower lip of corolla not saccate. 



Bracts, and scales if present, flat, basally attached ; aquatic. 3. Utricularia. 



Bract solitary, tubular, surrounding the scape; scales none. 4. Lecticula. 



Bracts and scales peltate ; terrestrial. 5. Setiscapella. 



Bracts at the base of the pedicels accompanied by a pair of bractlets; calyx enclosing the fruit; 

 terrestrial. 6. Stomoisia. 



i. PINGUICULA [Tourn.] L. Sp. PI. 17. 1753. 



Acaulescent herbs, with fibrous roots, naked i-flowered circinate scapes, and leaves in 

 a basal rosette, the upper surface commonly glandular and covered with a viscid secretion. 

 Calyx 5-lobed, more or less 2-lipped, the upper lip 3-lobed, the lower 2-lobed. Corolla 5-lobed, 

 more or less 2-lipped, the upper lip 2-lobed, the lower 3-lobed; base of the corolla saccate 

 and contracted into a nectariferous spur. Capsule 2-valved. Seeds oblong, reticulate. [Latin, 

 pinguis, fat, from the apparent greasiness of the leaves of several species.] 



About 35 species, of wide distribution in the northern hemisphere, and southward along the 

 Andes to Patagonia. Besides the following, 4 others are found in the southeastern United States. 

 Type species : Pinguicula vulgaris L. 



Scapes villous, \'-2' high ; corolla pale violet, less than 6" long. 



Scapes glabrous or nearly so, 2' -6' high ; corolla violet-purple, more than 7" long. 



i. Pinguicula villosa L. Hairy Butterwort. 

 Fig. 3858- 



Pinguicula villosa L. Sp. PI. 17. 1753. 



Pinguicula acutifolia Michx. Fl. Bor. Am. i: n. 1803. 



Scapes slender, densely villous, i'-2 f high, becoming li'-s' 

 high in fruit. Leaves 3-6, the blades oval, obtuse or emargi- 

 nate, 3"-6" long, the margins usually inrolled ; calyx minute, 

 i"-l" long, the lobes acute, the 2 lower ones smaller and 

 partly united ; corolla pale violet with a yellowish striped 

 throat, 4"-6" long including the slender obtuse spur, 2-lipped, 

 the upper lip erect, 2-lobed, the lower spreading, 3-lobed ; cap- 

 sule subglobose, about i" in diameter. 



In bogs, circumpolar; southward in America to Labrador, Hud- 

 son Bay, Yukon, and Alaska. June-July. 



* Text contributed by Dr. JOHN HENDLEY BARNHART. 



15 



1. P. villosa. 



2. P. vulgaris. 



4 

 5 



