802 LENTIBULARIACEAE 



or with minute scales, 1-many-flowered. Flowers perfect, irregular. Calyx 

 of 2 or 5 herbaceous sepals. Corolla more or less 2-hpped; tube spurred or 

 saccate. Stamens 2, the filaments adnate to the base of the corolla-tube on 

 the upper side, flattened, twisted. Anthers 1-celled. Pistil solitary, with 

 free central placenta; style thick and short; stigma 2-lobed, with unequal 

 lobes. Fruit a 2-valved or irregularly dehiscent capsule. Seeds numerous, 

 anatropous, rugose; endosperm wanting. 



Calyx of 2 sepals; corolla-tube closed by a palate; plants submerged, with dissected 



leaves ^* UTRICULARIA. 



Calyx of 5 sepals; corolla with an open throat; plants aerial, with basal entire leaves. 



2. JrLNXjrTJICULA. 



1. UTRICULARIA L. BLADDERWORT. 



Aquatic plants. Stems horizontal, mostly submerged. Leaves finely dis- 

 sected and in ours bladder-bearing; bladders urn-shaped, the mouth closed by a 

 lid. Flowers perfect, racemose. Sepals 2, slightly united. Corolla 2-lipped, 

 in ours yellow, with the throat closed by a palate; upper lip 2-lobed or entire; 

 lower lip 3-lobed or entire, with a spur at the base. Capsule irregularly dehis- 

 cent, many-seeded. 



Leaves 2-3 times pinnately divided, with long divisions; corolla about 12 mm. broad; 



spur prominent, elongate-conic, curved. 1. U. vulgaris. 



Leaves dichotomously divided, with very short divisions; corolla 4-6 mm. wide; spur a 



mere protuberance. 2- U. minor. 



1. U. vulgaris L. Stem submerged, leafy, 3-12 dm. long; bladders 3-5 mm. 

 long; scape 1-3 dm. long; racemes 5-10-flowered; corolla yellow, 12-15 mm. 

 broad; upper lip entire, erect; lower lip 3-lobed, spreading; spur not appressed, 

 horn-like, slightly curved, shorter than the lower lip. Shallow water: Newf. 

 Fla Calif. B.C. Plain Subalp. Je-Au. 



2. U. minor L. Stem leafy, submerged, short; bladders few, 2 mm. long or 

 less; scape 0.5-1.5 dm. high; corolla pale yellow, 4-6 mm. broad; spur much 

 shorter than the lower lip. Shallow water: Greenl. N.J. Calif. B.C. Sub- 

 mont. Mont. Jl-Au. 



2. PINGUICULA (Tourn.) L. BUTTERWORT. 



Terrestrial scapose herbs of wet places. Leaves in basal rosettes, flat, entire, 

 producing above a mucilaginous secretion. Scapes 1-flowered. Sepals 5, often 

 more or less united. Corolla yellow, violet, or in ours purple, more or less 2-lipped, 

 with an open throat; lobes entire or cleft; tube produced below into a nectar- 

 iferous spur. Stamens 2. Capsule 2-valved. Seeds many. 



Lower lip of the corolla about 15 mm. long; base of the corolla conic, ending in a straight 

 filiform cylindric spur. 1. P. macroceras. 



Lower lip of the corolla 10-12 mm. long; base of the corolla ovoid-conic, ending in a 

 tapering, slightly recurved spur. 2. P. vulgaris. 



1. P. macroceras Willd. Leaves oval or obovate, 2-4.5 cm. long, 1-1.5 cm. 

 wide; scape 5-10 cm. high; calyx about 4 mm. long; upper lip 2-cleft fully half 

 its length into deltoid lobes; lower lip still deeper cleft, with lanceolate lobes; 

 corolla dark purple, 10-15 mm. broad; spur about 1 cm. long. Bogs: Alaska 

 Alta. Mont. Wash.; e Asia. Subalp. My-Au. 



2. P. vulgaris L. Leaves elliptic or oval, 2-5 cm. long, 1-2 cm. wide; scape 

 3-12 cm. high; calyx about 3 mm. long; upper lip not cleft to the middle, with 

 triangular lobes; corolla paler, less than 1 cm. wide; spur 6-8 mm. long. Bogs: 

 Greenl. Newf. Vt. Mont. Alta. Yukon; Eurasia. Subalp. Subarctic. 

 My-Jl. 



Family 119. OROBANCHACEAE. BROOM-RAPE FAMILY. 



Root-parasites, destitute of green foliage. Leaves scale-like. Flowers 

 perfect or rarely dioecious. Calyx of 4 or 5, more or less united sepals. 

 Corolla more or less bilabiate, persistent and withering. Stamens 4, didyna- 



