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..
Gerardia parvifolia Chapm. Fl. S. U. S. 300. 1860.
Annual, pale green, usually roughish; stems 8'-2 1/20 tall, simple or branched above, striate-angled, the branches mostly ascending. Leaves few, remote, linear-spatulate, to narrowly linear, more or less revolute, 2 1/2" - 10" long or rarely slightly longer, scabrous-pubescent above; pedicel exceeding the calyx; calyx campanulate or turbinate-campanulate, 1"-1 1/2" high, the lobes minute, triangular; corolla light rose-colored, about £' long, or less, the lobes obcor-date or deeply emarginate; capsules globose-ovoid, or oval, 1 1/2"- 2' long, apiculate.
In dry sandy soil or on banks, Massachusetts to Florida and Louisiana. Aug.-Oct.
Gerardia Skinneriana Wood, Classbook 408. 1847.
?G. tenuifolia asperula A. Gray, Bot. Gaz. 4: 153. 1879.
Annual, roughish; stem strict, striate, branched, or sometimes simple, 6'-18' high, very slender, the branches erect or ascending. Leaves setaceous, ascending or commonly erect and appressed, 1/2'-1' long, 1/2" wide or less, the uppermost minute; pedicels longer than the calyx, scarcely longer than the flowers, 2-4 times the length of the capsule; calyx-teeth minute; corolla light purple, 5"- 6" long and about as broad, glabrous without, its lobes ciliolate; capsule oblong, 2"-3" high, considerably longer than the calyx.
In dry sandy woods and thickets, Indiana to Minnesota and Kansas. Recorded from Ontario. Aug.-Oct.
Gerardia viridis Small, differing by more widely spreading pedicels and narrow calyx-teeth often one-half as long as the tube, inhabits the western Gulf States and is recorded as extending northward into Missouri.
Gerardia setacea Walt. Fl. Car. 170. 1788.
A. setacea Raf. New Fl. N. A. 2: 64. 1836.
G. Holmiana Greene, Pittonia 4: 52. 1899.
Annual, smooth or slightly scabrous; stems T°-2° tall, loosely branching, the branches mostly ascending. Leaves rather numerous, mostly opposite, linear-filiform or setaceous-filiform, 1/4' - 1 1/4' long, scabrous or nearly smooth; pedicels very slender, 1/2' - 1 1/2' long; calyx campanulate, 1 1/2"- 2" long, the lobes broadly triangular, about i as long as the tube; corolla rose purple, 5"- 8" long or rarely larger; capsules subglo-bose or globose-oval, 2"-2i" in diameter.
In dry soil or pine barrens, New Jersey to Florida and Texas. Aug.-Oct.
Gerardia Gattingeri Small, Fl. SE. U. S. 1078. 1903.
Annual, smooth or slightly scabrous; stem 8'-2° tall, wiry, with smooth very slender long branches. Leaves numerous, linear-filiform or almost filiform, 1/2'-1 1/4' long, acute, smooth or slightly roughened; pedicels spreading or ascending, filiform, 1/2'-1' long, less than twice the length of the leaves; calyx campanulate, its teeth subulate or linear-subulate, much shorter than the tube; corolla rose purple, 8"-10" long; capsules subglobose, 1 3/4"-2" in diameter.
In dry soil or woods, Wisconsin and Iowa to Tennessee and Texas. Aug.-Oct.