This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Lobelia glandulosa Walt. Fl. Car. 218. 1788.
Perennial; stem slender, leafy below, nearly naked above, simple, glabrous, or sparingly pubescent, 1°-4° high. Leaves elongated-linear to narrowly lanceolate, thick, glabrous, strongly glandular-dentate, the lower petioled, obtuse, often 7' long and 4" wide, the upper sessile, acutish, shorter; flowers racemose-spicate, secund, often few and distant, blue, nearly 1' long; bracts narrow, glandular; peduncles very short, sometimes with a pair of glands near the base; calyx-tube often densely hirsute, its lobes subulate, the sinuses not appendaged; corolla-tube 5"-6" long, i"-i1/2" thick, about twice as long as the calyx-lobes; larger lip of the corolla pubescent within at the base, its lobes ovate, acutish; anthers all bearded at the tip.
In swamps near the coast, southern Virginia to Florida. July-Sept.
Perennial or biennial, puberulent, smooth or roughish; stem strict, simple, leafy, 1°-4° high. Leaves thickish, pale green, repand-dentate, crenulate, or entire, the basal ones commonly tufted, broadly oblong, oval, or obovate, very obtuse, narrowed into short petioles, 1'-3 1/2' long; 1'-2' wide; stem leaves sessile, oblong, lanceolate, or spatulate, obtuse, the uppermost gradually smaller and acutish; flowers pale blue, 3"-5" long, densely or distantly racemose-spicate, the inflorescence sometimes 2° long; bracts linear, entire; pedicels very short, ascending; calyx-tube turbinate, usually glabrous, shorter than its subulate spreading, sometimes hirsute or ciliate lobes, the sinuses usually not at all appendaged; corolla-tube about 21/2" long and 1" thick.
In dry, mostly sandy soil, or in meadows, Prince Edward Island to Saskatchewan, North Carolina, Alabama, Louisiana and Arkansas. Races differ in pubescence and in size of flowers. Ascends to 2500 ft. in Virginia. June-Aug.
Lobelia leptostachys A. DC. Prodr. 7: 376. 1839.
Similar to the preceding species; stem usually stouter, puberulent or glabrous, 2°-4° high. Basal leaves oval or obovate, obtuse; stem leaves spatu-late, oblong, or lanceolate, obtuse, sometimes slightly scabrous, denticulate or entire, or the uppermost narrower and acute; spike-like raceme elongated, usually dense; bracts linear, glabrous; pedicels very short; calyx-lobes linear-subulate, nearly as long as the corolla-tube, the sinuses with subulate deflexed auricles; flowers blue, 4"-5" long.
In dry soil, Virginia to Ohio and Illinois, Georgia and Kansas. June-Aug.