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2. Corolla-tube only z"-A," long. 

 Stems mostly simple; flowers in terminal spike-like racemes, 

 ises of the calyx without auricles. 

 Sinuses of the calyx with reflexed subulate auricles. 

 Stems mostly paniculately branched; flowers in loose racemes. 

 Stem stout, pubescent ; leaves ovate or oblong, dentate. 

 Stems slender, glabrous; stem-leaves narrow, the basal wider. 



Pedicels mostly longer than flowers, j-bracteolate near the middle. 

 Pedicels not longer than flowers, not bracteolate, or only so at the base. 

 . ,11a 2;4"-3K" long; calyx-tube hemispheric in fruit. 

 Corolla 3,W'-iVi" long; calyx-tube turbinate. 



i. Lobelia Dortmanna L. Water Lobelia. Water 

 I Uadiole. Fig. 4028. 



Lobelia Dortmanna L. Sp. PI. 9^9. 1 753- 



Perennial, aquatic, glabrous throughout, somewhat 

 fleshy; roots numerous, white, fibrous; stem slender, 

 simple, erect, hollow, minutely scaly, 6'-i8' high. Leaves 

 all submersed and tufted at the base of the stem, terete, 

 hollow, obtuse, longitudinally divided by a partition, 

 \'-2 long, about 2" thick; flowers in a loose terminal 

 raceme, blue, 6"-8" long; pedicels filiform, shorter than 

 or equalling the flowers ; calyx-lobes subulate or lanceo- 

 late, shorter than the tube, the sinuses usually not at 

 all appendaged ; corolla-tube 3"-4" long, its lower lip 

 glabrous or nearly so. 



Borders of ponds, usually in sandy soil, sometimes wholly 

 emersed when the water is low, New Jersey and Pennsyl- 

 vania to Newfoundland, Wisconsin. Washington and British 

 Columbia. Also in Europe. July-Sept. 



2. Lobelia paludosa Nutt. Swamp Lobelia. 

 Fig. 4029. 



Lobelia paludosa Nutt. Gen. 2: 75. 1818. 



Perennial, aquatic, glabrous throughout; roots few and 

 thick; stem nearly naked, slender, simple, or branched 

 above, i-4 high. Leaves mostly tufted at the base, flat, 

 narrowly oblong or spatulate, emersed, obtuse or acutish, 

 entire or repand-denticulate and glandular, those of^the 

 stem few, small and sessile, the basal ones 2'-c/ long, 2"-4" 

 wide, narrowed into petioles ; flowers pale blue, racemose, 

 S"-6" long ; calyx-lobes narrowly lanceolate, about as long 

 as the tube, the sinuses commonly not at all appendaged ; 

 corolla-tube z"-<\" long, its lower lip pubescent at the base. 



In swamps and ponds. Delaware to Florida and Louisiana 

 mostly near the coast. May-July. 



3. Lobelia cardinalis L. Cardinal-flower. 

 Red Lobelia. Red Betty. Fig. 4030. 



Lobelia cardinalis L. Sp. PI. 93- t/53- 



Perennial by offsets ; stem slightly pubescent, or 

 glabrous, leafy, simple or rarely branched, 2-4* 

 high. Leaves' oblong, oval, ovate-lanceolate, or 

 lanceolate, thin, glabrous or sparingly pubescent. 

 2'-6' long, i'-li' wide, acuminate or acute at both 

 ends, crenulate or denticulate, the upper sessile, 

 the lower petioled ; flowers racemose, commonly- 

 numerous, bright scarlet or red (rarely white). 

 i'-ii' long; bracts usually glandular; calyx gla- 

 brous or pubescent, its lobes linear, elongated, 

 acute; corolla-tube nearly or quite 1' long; larger 

 anthers glabrous. 



In moist soil, New Brunswick to Florida, Ontario. 

 Kansas, Colorado and Texas. Slink-weed. Hog's- 

 physic. July-Sept. 



