PINGUICULACEAE. 169 



lobes linear, 11-15 mm. long, acuminate: corolla bright-purple, 2-2.5 cm. long: 

 capsules 2-2.5 cm. long. Everglades and low pinelands. 



FAMILY 13. PINGUICULACEAE. 1 BLADDERWORT FAMILY. 



Herbs growing in water or wet places. Leaves submersed and dis- 

 sected, sometimes resembling rootlets and often bladder-bearing; or aerial, 

 basal, entire ; or rarely, wanting. Scapes naked or minutely scaly. Flowers 

 irregular, perfect. Calyx of 2-5 herbaceous sepals. Corolla 2-lipped : tube 

 spurred or saccate. Androecium of 2 stamens, adnate to the corolla-tube 

 on its upper side. Filaments flattened, twisted. Anthers confluently 

 1-celled. Gynoecium a single 1-celled pistil, with a free-central usually 

 globose placenta. Style thick. Stigma often unequally 2-lipped. Fruit 

 a capsule, 2-valved or irregularly dehiscent. 



Calyx of 5 sepals : palate Included In the corolla-tube. 1. PIXGUICULA. 



Calyx of 2 sepals : palate at base of lower Up of corolla. 

 Calyx without bractlets : sepals entire. 



Pedicels each with a solitary bract at base. 

 Stems elongate, more or less free-swimming. 



Corolla violet-purple. 2. VESICULINA. 



Corolla yellow. 3. UTRICDLABIA. 



Stems radiating from the base of the scape, terres- 

 trial or in shallow water. 



Corolla violet-purple: bract 1, tubular. 4. LECTICCLA. 



Corolla yellow : bracts peltate. 5. SETISCAPELLA. 



Pedicels each with a bract and 2 bractlets at base. 6. STOMOISIA. 

 Calyx with a pair of bractlets resembling exterior sepals : 



scales, bracts, bractlets, and sepals flmbriate. 7. ARABELLA. 



1. PINGUICULA [Tourn.] L. Terrestrial scapose herbs. Leaves in a 

 basal rosette: blades flat. Scapes usually several, 1-flowered, without scales or 

 bracts. Sepals 5, more or less united. Corolla spurred at the base, the palate 

 subulate, included in the tube. 



1. P. pumila Michx. Leaves clammy-pubescent: scapes very slender, 5-20 cm. 

 tall: corolla 1-2 cm. broad; spur subulate, about 3 mm. long, longer than the 

 sac-like base of the corolla. Everglades and low pinelands. F. K. (Bah.) 



BUTTERWORT. 



2. VESICULINA Eaf. Aquatic herbs. Stems submersed, the branches 

 whorled, decompound. Leaves none. Bladders terminal, the mouth naked. 

 Scapes 1-4-flowered: scales below the lowest pedicel none: bractlets none. 

 Sepals 2, slightly united. Corolla 2-lipped: lower lip 3-lobed, the lateral lobes 

 saccate, forming together a prominent divergently 2-lobed palate, the middle 

 lobe short. 



1. V. purpurea (Walt.) Eaf. Stems elongate, the branches numerous, whorled, 

 verticillately decompound: bladders solitary, terminating many of the ultimate 

 branchlets, the orifices without projecting processes: scapes erect, slender, 

 spongy-thickened below, 0.5-1.5 dm. tall: pedicels erect or ascending: calyx 

 becoming 2.5-3 mm. long: corolla violet-purple, 12 mm. broad; spur conic, 

 somewhat flattened, about i as long as the middle lobe of the lower lip. 

 Everglades. (Cuba.) 



3. UTKICULABIA L. Aquatic herbs. Stems submersed, the branches 

 alternate or from the base of the scapes. Leaves alternate, dissected. Blad- 

 ders borne on the leaf -segments, the mouth with a pair of bristles. Scapes 

 1-many-flowered : scales below the lowest pedicel several: bractlets none. 



1 Contributed by Dr. John Hendley Barnhart. 



