PINGUICULACEAE. 169 



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

 capsules 2-2.5 cm. long. — Kvergla<les ami low pinelands. 



Family 13. PINGUICULACEAE.' Blauderwort Family. 



Herbs gTowin<i' in water or wet i)laf'e.<5. 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, jDerfect. Cah^x of 2-5 herbaceous sepals. Corolla 2-lii>ped : tube 

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

 on its upper side. Filaments flattened, twisted. Anthers con fluently 

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

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

 a capsule, 2-valved or irregiilarly dehiscent. 



Calyx of 5 sepals: palate included in the corolla-tube. 1. Pinguicula. 



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

 Calyx without l)raetlets : sepals entire. 



Pedicels each with a solitary bract at base. 

 Stems elongate, more or less free-swimming. 



Corolla violet-purple. 2. Vesiculin.\. 



Corolla yellow. 3. Utricularia. 



Stems radiating from the base of the scape, terres- 

 trial or in shallow water. 

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



Corolla yellow : bracts peltate. ■">. Setiscapella. 



Pedicels each with a bract and 2 bractlets at base. ('>. Sto.moisia. 

 Calyx with a pair of bractlets resembling exterior sepals : 



scales, bracts, bractlets, and sepals fimbriate. 7. Aranella. 



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. VESICUIjINA Eaf. Aquatic herbs. Stems submersed, the lirauches 

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

 Scapes 1-4-tlowered : 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.-^-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. UTKICULAULA L. Aquatic herbs. Stems submersed, the branches 

 alternate or from the l>ase 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. 



^ Contributed by Dr. John Hendley Barnhart. 



