LOBELIACEAE (LOBELIA FAMILY) 217 



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



C. preDanthoides 

 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. rotundUolla (bluebell} 



LOBELIACEAE (Lobelia Family) 



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

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

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

 rarely the filaments united about the style. Ovary inferior or 5 

 inferior, 1-2-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 s of the anthers with a tuft of 

 hair at tip. Seeds many. — (Honor of M. de I'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. 



£. L. kalmli 



DOWNINGIA 



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

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



