LOBELIACEAE 



1143 



Leaves conspicuously numerous ; blades mostly less than 2 cm. long, 



closely toothed. 3. L. brevifolia. 



Leaves relatively few. never conspicuously numerous ; blades over 2 cm. 



long, remotely and irregularly toothed. 

 Lower lip of the corolla glabrous. 



Sepals with deflexed auricles at the base. 



Anthers glabrous at the tip. 4. L. syphilitica. 



Anthers bearded at the tip. 5. L. puberula. 



Sepals without auricles. 



Leaf-blades of a relatively broad type, spreading. 



Bracts, at least the lower ones, longer than the calyxes dur- 

 ing anthesis : leaf-blades undulate or sinuate-undulate. 6. L. amoena. 

 Bracts, at least the lower ones, shorter than the calyxes dur- 

 ing anthesis : leaf-blades with salient gland-tipped teeth. 7. L. glandulifera. 

 Leaf-blades linear, erect or nearly so. 8. L. elongata. 



Lower lip of the corolla pubescent or tuberculate within. 



Sepals fully twice as long as the hypanthium : lower corolla-lip 



pubescent at the base. 9. L. glandulosa. 



Sepals about as long as the hypanthium : lower corolla-lip with 2 



tubercles at the base. 10. L. Halei. 



Stems scape-like. 11. L. Floridana. 



Corolla, exclusive of the lower lip, less than 1 cm. long. 



Stems scape-like. 12. L. paludosa. 



Stems leafy. 



Racemes secund. 



Sepals manifestly auricled at the base. 



Corolla about 1.5 cm. long : sepals glandular-toothed. 13. L. flaccidifolia. 



Corolla less than 1 cm. long : sepals hispid-ciliate. 14. L. appenaiculata. 



Sepals without auricles, or these callus-like. 15. L. Oattingeri. 



Racemes not secund. 



Stem-leaves with sessile blades. 



Stem-leaves with relatively broad blades, never linear : flowers in 



continuous spike-like racemes. 

 Capsule partly inferior. 



Sepals not auricled at the base. 16. L. spicata. 



Sepals with deflexed auricles at the base. 



Bracts not surpassing the corollas. 17. L. leptostachy$. 



Bracts surpassing the corollas. 18. L. bracteata. 



Capsule wholly inferior. 19. L. inflata. 



Stem-leaves with linear blades, or of a linear type, or filiform : flow- 

 ers in lax racemes. 

 Stem-leaves filiform : pedicels conspicuously longer than the 



corollas. 20. L. Boykinii. 



Stem-leaves with linear blades : pedicels shorter than the corollas. 

 Corolla over 8 mm. long : hypanthium oblong or turbinate- 



oblong at maturity. 21. L, Caribyi. 



Corolla less than 8 mm. long : hypanthium hemispheric at 



maturity. 22. L. Nuttattii. 



Stem-leaves with manifest petioles. 

 Pedicels over 10 mm. long. 

 Capsules barely % superior. 



Capsules % superior. 

 Pedicels less than 1( 



23. L. Cliffortiana. 



124. L. Xalapctisis. 

 ri 10 mm. long. 



Capsules y~ superior. 25. L. brachypoda. 



Capsules % superior. 26. L. Feayana. 



1. Lobelia cardinalis L. Perennial, minutely pubescent or glabrous, deep-green. 

 Stems erect, 3-12 dm. tall, usually simple : leaf-blades varying from ovate-lanceolate to 

 narrowly oblong, or the lower ones sometimes oblong-spatulate, 3-15 cm. long, acuminate at 

 both ends, coarsely or finely serrate or dentate, sessile or short-petioled : raceme virgate, 

 1-4 dm. long : hypanthium commonly shorter than the pedicel : sepals linear or linear- 

 subulate, 2-6 times longer than the hypanthium : corolla deep-red or rarely white ; tube 

 longer than the lobes, straight ; lobes on either side of the cleft linear-oblanceolate, longer 

 than the other 3 narrowly oblong or oblong-oblanceolate lobes : capsules hemispheric, with a 

 low beak, 8-10 mm. in diameter : seeds oblong, 1-1.2 mm. long, strongly tuberculate. 



In swamps and on muddy or wet banks, New Brunswick to Saskatchewan, Florida and Texas. 

 Summer and fall. CARDINAL-FLOWER. 



2. Lobelia spleiidens Willd. Perennial, slender, glabrous or rarely puberulent. 

 Stems erect or ascending, 3-12 dm. tall, simple : leaf -blades linear or linear-lanceolate, 

 or the lower ones narrowly oblanceolate, 3-12 cm. long, acuminate, more or less distinctly 

 glandular-toothed, the upper sessile the lower short-petioled : raceme 1.5-3.5 dm. long : 

 pedicels erect or ascending : sepals linear-lanceolate or linear-subulate, several times longer 

 than the hypanthium : corolla deep-red ; tube longer than the lobes, the two of which on 

 either side the cleft are linear or linear-oblanceolate, the other 3 oblong or oblong-oblan- 

 ceolate : capsules subglobose-hemispheric, with a conic beak, 8-10 mm. broad, prominently 

 ribbed : seeds oblong or nearly so, 0.7-0.8 mm. long, strongly tuberculate. 



In wet places, Texas to California and Mexico. Summer and fall. 



3. Lobelia brevifolia Nutt. Perennial, glabrous or puberulent. Stems erect, 3-8 

 dm. tall, virgate, simple or nearly so : leaf-blades fleshy, spreading or reflexed, the lower 



