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..
Phlox ovata L. Sp. Pl. 152. 1753.
Phlox Carolina L. Sp. Pl. Ed. 2, 216. 1762.
Glabrous or nearly so throughout; stems simple, slender, ascending from a decumbent base, 1°-2° hisrh. Leaves rather firm, the upper ovate or ovate-lanceolate, sessile by a rounded or sub-cordate base, acute at the apex, 1'-2' long, the lower and basal ones longer, oblong or ovate-oblong, acute at both ends, narrowed into slender often margined petioles; flowers short-pedicelled in corymbed or sometimes simple cymes; calyx-teeth lanceolate or triangular-lanceolate, acute, or acuminate, one-third to one-half the length of the tube; corolla pink or red, its lobes obovate, rounded, entire.
Phlox glaberrima L. Sp. Pl. 152. 1753.
Glabrous or nearly so throughout; stem simple, slender, erect or ascending, 1°-3° high. Leaves lanceolate or linear, rather firm, mostly 1-nerved, acuminate at the apex, narrowed at the base, 1 1/2'- 4' long, 2"-6" wide, sessile, or the lowest linear or oblong, obtusish, shorter, and short-petioled; flowers short-pedicelled, the cymules corymbed; calyx-teeth subulate-lanceolate, one-third to one-half the length of the tube; corolla commonly pink, its lobes obo-vate, rounded or obcordate, longer than the tube.
In open woods and on prairies, Virginia to Illinois, Wisconsin, Florida, Mississippi, Missouri and Arkansas. Ascends to 2200 ft. in Virginia. May-July.
Phlox pilosa L. Sp. Pl. 152. 1753.
Soft downy or hairy, often glandular; stem erect or ascending, simple or branched, slender, 1°-2° high. Leaves linear or lanceolate, spreading or divaricate, long-acuminate, 1'- 4' long, 1 1/2"-4" wide, sessile, the base narrowed or rounded; cymules corymbed; flowers short-pedlcelled; calyx glandular, viscid, its teeth setaceous-subulate, longer than the tube; corolla pink, purple or white, its lobes obovate, entire, the tube usually pubescent; capsule shorter than the calyx.
In dry soil, Ontario to Manitoba, Connecticut, New Jersey, Florida, Arkansas and Texas. Hairy phlox. Sweet-william. April-June.
Phlox argillacea Gute & Ferriss is a recently described relative or race of this species, growing on prairies in Indiana and Illinois.
Phlox amoena Sims, Bot. Mag. pl. 1308. 1810.
Usually quite hairy; stems simple, slender, ascending, 6'-18' high. Leaves linear-oblong to ovate-oblong, sessile, acute or obtuse at the apex, mostly narrowed at the base, nearly erect, 1/2-2' long, 1 1/2-2 1/2" wide, the lowest much shorter; flowers very nearly sessile in a dense terminal simple or somewhat compound cyme, which is subtended by the uppermost pair of leaves; calyx hirsute, its teeth subulate, as long as or shorter than the tube; corolla pink or white, its lobes obovate, entire or rarely emarginate, shorter than the glabrous tube.
In dry soil, Virginia to Kentucky, Tennessee, Florida and Alabama. April-June.