826 LOBELIACEAE 



erect, 2-cleft; lower lip larger, 3-cleft and widely spreading. Filaments and 

 anthers completely united; two of the anthers witli minute bristle-tufts. Cap- 

 sule 2-celled, 2-valved. Seeds many, somewhat fusiform. 



Pedicels longer than the floral leaves. 1. P. carnosula. 



Pedicels shorter than the floral leaves. 2. P. eximia. 



1. P. carnosula (H. & A.) Torr. Stem glabrous, branched, 2-25 cm. high; 

 leaves fleshy, lanceolate, entire, sessile, 5-15 mm. long; pedicels 7-15 mm. long; 

 sepals linear, 3-5 mm. long; corolla 8-10 mm., blue, with yellow throat; fruit 

 8-10 mm. long. Laurentia carnosula H. & A. Mud: Mont. — Wyo. — Calif. Je- 

 Au. 



2. P. ezixnia A. Nels. Perennial (?); stem about 1 dm. high, glabrous; 

 leaves lanceolate or lance-linear, long-acimiinate, 15-25 mm. long; pedicels 

 short, 4-7 nam. long; sepals hnear, 3-6 mm. long, obtusish; corolla deep blue 

 with only the folds at the sinuses of the lip yellow, 8-12 mm. long. L. eximia 

 A. Nels. Muddy shores: w Wyo. Mont. Am. 



5. LOBELIA (Pliun.) L. Lobelia, Cardinal-flower. 



Terrestrial herbs with leafy stems, or aquatic ones with long scapes. Leaves 

 alternate, or in the aquatic species mostly basal. Flowers perfect, in spikes, 

 racemes, or panicles. Hypanthium short, oblong to turbinate. Sepals 5, prac- 

 tically distinct. Corolla spht to or nearly to the base on the upper side; upper 

 two lobes narrow, spreading or reflexed, the lower 3 lobes united to a broad 

 spreading hp. Stamens 5; filaments monadelphous, free from the corolla; 

 anthers united, two or all bearded at the apex. Ovary 2-celled; stigmas 2-lobed. 

 Capsule 2-valved Seeds many. 



Corolla red. 



Leaves oblong-ovate to ovate-lanceolate. 1. L. cardinalis. 



Leaves narrowly lanceolate to hnear. 2. L. splendens. 



CoroUa blue or whitish. 



Corolla 2-2.5 cm. long. 3. L. syphilitica. 



Corolla less than 1 cm. long. 

 Stem leafy. 



Stem-leaves spatulate or oblanceolate ; raceme many-flowered; plant puberu- 



lent. 4. L. hirtella. 



Stem-leaves linear or Unear-oblanceolate ; racemes few-flowered; stem and 

 leaves glabrous. 5. L. strictiflora. 



Stem scapiform; leaves all in a basal rosette, usually submerged. 



6. L. Dortmanna. 



1. L. cardinalis L. Perennial by means of slender offsets; stem 5-12 dm. 

 high, glabrous or nearly so; leaves irregularly serrate or serrulate; hypanthium 

 hemispheric, 3 mm. long; sepals subulate, about 1 cm. long; corolla red or crim. 

 son, rarely rose-colored, 3-4 cm. long. Wet ground: N.B. — Fla. — Tex. — Colo. 

 — Sask. Plain. Jl-0. 



2. L. splendens WiUd. Perennial, with slender offsets; stem 3-10 dm. high- 

 glabrous or minutely puberulent; leaves denticulate; sepals subulate, about 8 

 mm. long; corolla crimson, 2-2.5 cm. long. Wet places: Tex. — Utah — Calif.; 

 Mex. Son. Jl-S. 



3. L. syphilitica L. Perennial with offsets; stem glabrous or with scattered 

 hairs, 5-10 dm. high; leaves thin, lanceolate or oblong, sinuate-dentate, 5-15 cm. 

 long, more or less puberulent; raceme spike-like ; sepals subulate, about 1 cm. long, 

 cihate, with auricles in the sinuses; corolla 2-2.5 cm. long, with thick tube; 

 hypanthium hemispheric. Wet places: Me. — Ga. — La. — Colo. — S.D. Plain. 

 Au-0. 



4. L. hirtella (A. Gray) Greene. Perennial, with offsets; stem simple, 2-4 

 dm. high, finely short-pilose; lower leaves spatulate or obovate, often sinuate- 

 denticulate, 2-4 cm. long, puberulent; bracts, pedicels, hypanthium, and calyx 

 hirsutulous; hypanthium turbinate, 2 mm. long; sepals 4 mm. long, subulate, 

 minutely auricled at the sinuses; corolla light blue, 7-8 mm. long. L. spicata 

 hirtella. Hills and prairies: Minn. — la. — Kans. — Sask. Jl-Au. 



