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..
Campanula glomerata L. Sp. Pl. 166. 1753.
Perennial by short rootstocks; stem stout, simple, erect, pubescent, leafy, 1°-2° high. Leaves pubescent on both sides, crenulate, the lower and basal ones oblong or ovate, mostly obtuse, sometimes cordate, slender-petioled, 2'-4' long, the upper lanceolate or ovate-lanceolate, acute, sessile or clasping, smaller; flowers about 1' long, sessile, erect and spreading in terminal and axillary glom-erules; corolla campanulate, blue, rather deeply 5-lobed; calyx-lobes lanceolate, acuminate; capsule ovoid or oblong, erect, about 3" high, opening near the base.
In fields and along roadsides, eastern Massachusetts and Quebec. Naturalized from Europe. Sometimes called canterbury bells, a name more properly belonging to C. medium and C. Trachelium. June-Aug.
Campanula aparinoides Pursh, Fl. Am. Sept. 159. 1814.
Perennial; stems very slender or filiform, weak, reclining or diffuse, rough with short retrorse bristles, leafy, paniculately branched, 6-2 ° long. Leaves lanceolate, or linear-lanceolate, sessile, sparingly crenulate with low teeth, or entire, rough on the margins and midrib, acute at both ends, 1/2'-1 1/2' long, 1"-3" wide; flowers leafy-paniculate, 2V-4' long; pedicels filiform, divergent; buds drooping; corolla open-campanulate, deeply 5-cleft, white or bluish-tinged, 2V-4" long, its tube equalling or longer than the triangular-lanceolate acute calyx-lobes; style included; capsule subglobose, opening near the base.
In grassy swamps, Maine to Georgia, Kentucky and Colorado. Called also slender bellflower. June-Aug.
Campanula uliginosa Rydb.; Britton, Man. 885. 1901.
Perennial; similar to the preceding but branches less spreading; stem 1°-2° long, retrorsely hisoidulous on the angles. Leaves linear, 1'-2 1/2' long, 1/2 '-2 1/2' wide, retrorsely hispidulous on the margins and midribs, acute, minutely denticulate with callous teeth or entire; corolla blue with darker veins, cleft to below the middle into lanceolate lobes; capsule subglobose, about 2i" long and nearly as broad, opening near the base.
In wet meadows, New Brunswick to Saskatchewan, New York, Indiana and Nebraska. June-Aug.
Campanula divaricata Michx. Fl. Bor. Am. 1: 109.
1803. Campanula flexuosa Michx. loc. cit. 1803?
Perennial, glabrous but sometimes viscid; stem erect, paniculately branched, slender, 1°-3° high. Leaves lanceolate, ovate or oblong-lanceolate, the uppermost sometimes linear, sharply serrate, acuminate at the apex, narrowed to the base, the upper sessile, the lower petioled, 2'-3 long, 3"-12" wide, or the lowest commonly shorter and broader; flowers very numerous in compound panicles, drooping, slender-pedicelled; corolla light blue, cam-panulate, about 3" long; calyx-lobes lanceolate, acute, scarcely spreading, often dentate; style long-exserted; capsule turbinate, about 2,\" long, opening near the middle.
On rocky banks, mountains of Virginia and West Virginia to Kentucky, Georgia and Tennessee. Ascends to 2500 ft. in North Carolina. June-Sept.
Campanula americana L. Sp. Pl. 164. 1753.
Annual or biennial, more or less pubescent; stem erect or nearly so, rather slender, simple or rarely with a few long branches, 2°-6° high. Leaves thin, ovate, oblong, or lanceolate, serrate, acuminate at the apex, narrowed at the base, petioled. or the upper sessile, 3'-6' long, the lowest sometimes cordate; flowers in a loose or dense terminal sometimes leafy spike, which is often 1 °-2° long; lower bracts foliaceous, the upper subulate; corolla rotate, blue, or nearly white, about 1' broad, deeply 5-cleft; calyx-lobes linear-subulate, spreading, style declined and curved upward, long-exserted; capsule narrowly turbinate, ribbed, erect, 4"-5" long, opening near the summit.
In moist thickets and woods, New Brunswick to Ontario and South Dakota, south to Florida, Kentucky, Kansas and Arkansas. Rare near the coast in the Middle States and New England. Ascends to 3000 ft. in West Virginia. July-Sept.