1144 LOBELIACEAE 



ones spatulate, obovate or cuneate, the upper narrowly or linear-oblong, 0.5-2.5 cm. long, 

 obtuse, strongly toothed, sessile : raceme 0.5-4 dm. long, spike-like : pedicels erect or ap- 

 pressed, more or less pubescent, about as long as the strongly toothed bracts : sepals rigid, 

 pectinate-toothed, each with two obtuse auricles at the base : corolla pale blue : capsules 5-7 

 mm. high, with a broadly turbinate ribbed base and a conic beak : seeds tuberculate. 

 In moist pine lands, Florida to Louisiana. Summer and fall. 



4. Lobelia syphilitica L. Annual or perennial, slightly pubescent with scattered 

 spreading hairs. Stems erect, 2-6 dm. tall, sometimes sparingly branched : leaf -blades 

 oblanceolate, elliptic or lanceolate, 2.5-20 cm. long, acute or obtuse, coarsely serrate or 

 sinuate-dentate, the lower ones petioled, the upper sessile : raceme 1-5 dm. long, the 

 lower bracts leaf-like : hypanthium bristly-pubescent : sepals bristly-ciliate, long-acumi- 

 nate, with an ovate base, each prolonged below into 2 acute auricles : corolla blue striped 

 with white, or rarely white, tube slightly longer than the sepals, the lobes on either side 

 of the cleft lanceolate, more or less curled, acuminate, the three lower lobes ovate, acute 

 at the base, glabrous : capsules 8-10 mm. in diameter : seeds 1 mm. long, longitudinally 

 wrinkled. 



In wet places and swamps, valley of the St. Lawrence to South Dakota, Colorado, Georgia and 

 Louisiana. Summer and fall. A form, L. syphilitica Ludovicidna A. DC., with glabrate foliage and 

 nearly entire and thicker leaf-blades, occurs from Nebraska and Colorado to Louisiana. 



5. Lobelia pub6rula Michx. Perennial, softly pubescent with fine close hairs, or 

 glabrate. Stems erect, 3-10 dm. tall, simple, virgate, sometimes zigzag : leaf -blades spread- 

 ing or ascend ing, thick, 2-10 cm. long, the lower ones oblanceolate, oblong or obovate, short- 

 petioled, the upper varying from oblong to lanceolate or ovate, sessile, all finely toothed 

 or nearly entire: raceme 0.5-5 dm. long, its lower bracts sometimes leaf-like: pedicel 

 shorter than the hypanthium : sepals sometimes bristly, lanceolate, entire or sparingly 

 toothed, revolute, with short rounded auricles : corolla deep blue or rarely white, about 

 1.5 cm. long ; tube slightly longer than the sepals ; lobes on either side of the cleft lanceo- 

 late, the other 3 ovate or the middle one ovate-lanceolate, glabrous within : capsules 7-9 

 mm. thick, the conic beak as long as the base : seeds obovoid or oval, 0.7-0.9 mm. long, 

 tuberculate. 



In meadows and wet woods, New Jersey to Missouri, Florida and Texas. Summer and fall. A 

 more delicate form with glabrate foliage and more naked virgate racemes is L. puberula laeviiiscula C. 

 Mohr. 



6. Lobelia amoena Michx. Perennial, glabrous or finely pubescent in parts. Stems 

 erect or ascending, 3-12 dm. tall, leafy throughout, usually simple : leaf -blades deep green, 

 thinnish, oblong or elliptic, varying to broadest above or below the middle, undulate or 

 rather coarsely sinuate, paler beneath than above, the lower ones narrowed into margined 

 petioles, the upper sessile or nearly so : raceme usually 1-5 dm. long, often 1 -sided : bracts 

 variable in length, undulate or sharply toothed : sepals usually longer than the pedicels, 

 narrowly linear or linear-subulate, 7-8 mm. long, barely if at all auricled at the base, 

 entire or nearly so : corolla blue or rarely white, 2-2.5 cm. long, about as long as the 

 sepals or much longer : capsules 6-7 mm. broad, mostly inferior. 



In swamps or on damp hillsides, North Carolina to Florida. Summer and fall. 



7. Lobelia glandulifera (A. Gray) Small. Perennial, glabrous or nearly so. Stems 

 erect, 3-7 dm. tall, simple, rather strict : leaves usually few ; blades narrowly oblong to 

 oblong-ovate, 3-12 cm. long, rather coarsely and irregularly dentate with gland-tipped 

 teeth, the lower ones narrowed into margined petioles, the upper sessile : raceme virgate, 

 few-flowered, 1-3 dm. long : bracts ovate to lanceolate, conspicuously glandular-toothed : 

 hypanthium commonly surpassing the bract, much longer than the pedicel : sepals nar- 

 rowly lanceolate or linear-lanceolate, 7-9 mm. long, pectinately glandular-toothed, more 

 or less strongly auricled at the base : corolla blue, about 1.5 cm. long ; tube surpassing the 

 sepals : capsules 4-6 mm. broad. [.L. amoena var. glandulifera A. Gray. ] 



In low grounds, Virginia to Florida and Alabama. Summer and fall. 



8. Lobelia elongata Small. Perennial, at least by offsets, glabrous or nearly so. 

 Stems erect or ascending, 3-12 dm. tall, simple, commonly wand-like : leaves rather few, 

 erect or somewhat spreading ; blades linear or nearly so, 2-10 cm. long, mostly acute, 

 serrate or dentate-serrate with gland-tipped teeth, sessile or narrowed into petiole-like 

 bases : raceme rather closely but not densely flowered, 1-3 dm. long, one-sided : bracts 

 linear to lanceolate, serrate with gland-tipped teeth, the lower ones sometimes surpassing 

 the corollas : flowers short-pedicelled : sepals elongated linear-subulate or linear-setaceous, 

 entire, as long as the corolla or shorter : corolla deep blue, showy, ascending : capsules 6-8 

 mm. broad. 



In low grounds or swamps, Virginia to Florida and Louisiana. Summer and fall. 



9. Lobelia glandulosa Walt. Perennial, glabrous below the inflorescence. Stems 

 erect or decumbent, 3-12 dm. long, simple or nearly so, wand-like, sometimes zigzag : 



