LOBELIACEAE (LOBELIA FAMILY) 217 



BB. Stems clustered; leaves acute; pedicel shorter than the flower. U. 



C. prenanthoides 

 AA. Stem leaves linear or spatulate or cuneate; corolla lobes erect; style included. 



C. Plant puberulent; leaves all entire; basal-leaves spatulate; stem leaves mostly 

 linear. C. E. C. scabrella 



CC. Plant glabrous; at least the basal leaves not entire. 



D. Stem leaves spatulate-oblanceolate, dentate; basal leaves similar in form to 

 the stem leaves. W. C. piperi 



DD. Stem leaves linear, entire; basal leaves orbicular to cordate. W. C. E. 



C. rottmdifolia (BLUEBELL) 



LOBELIACEAE (LOBELIA FAMILY) 



Herbs, often with milky or acrid juice. Leaves alternate, simple; 

 stipules none. Flowers perfect, parts in 5*5, racemose or solitary- 

 axillary. Calyx i-lobed. Corolla-limb 2-lipped. Anthers and 

 rarely the filaments united about the style. Ovary inferior or ^ 

 inferior, i-2-celled; style i; stigma with a rim of hairs. Seed 

 small. 



A. Plants merely of wet places, not aquatic; flowers blue. 



B. Leaves wavy-denticulate or some of them entire; capsule free from the calyx 

 at its top; corolla cleft to the base on one side. LOBELIA (p. 217) 



BB. Leaves all entire; capsule wholly inferior. 



C. Calyx tube oblong or shorter; capsule short; stems creeping or diffuse, root- 

 ing at the nodes; corolla without white or yellow center. E. (Honor of M. A. 

 Laurenti, an Italian botanist.) Laurentia carnulosa 



CC. Calyx tube 10 or more times as long as wide; capsule 2-7 cm. long; stems 

 diffuse or erect, not rooting at the nodes; corolla deep blue with white or yellow 

 center. DOWNINGIA (p. 217) 



AA. Plants aquatic; submerged leaves linear-setaceous or terete. 



D. Submerged leaves 2-5 cm. long, all in a basal tuft; perrennial; corolla blue. 



LOBELIA (p. 217) 



DD. Submerged leaves 5-15 cm. long, scattered along an elongated stem; annual; 

 corolla white. W. (Honor of J. and T. Howell, Oregon botanists.) 



Howellia aquatica 



LOBELIA (LOBELIA) 



Perennial. Leaves alternate or all basal, simple. Flowers blue, in 

 racemes, bracted. Corolla divided to base on i side. Stamens free from 

 corolla, monadelphous at least above ; 2 or 5 of the anthers with a tuft of 

 hair at tip. Seeds many. (Honor of M. de 1'Obel, a Flemish botanist.) 



A. Aquatic; leaves all basal, terete, hollow. W. L. dortmanna (WATER LOBELIA) 

 AA. Terrestrial; most of the leaves scattered along the stem, flat, linear to spatulate. 



E. L. kalmii 



DOWNINGIA 



Annual, glabrous. Leaves sessile. Flowers solitary-axillary, sessile, 

 deep blue with white or yellow center. Corolla tube not split ; large lip 



