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..
G. grandiflora integriuscula A. Gray, Syn. Fl. N. Am. 21: 291. 1871.
Gerardia grandiflora serrata Robinson, in A. Gray, Man. Ed. 7, 730. 1908.
Perennial, grayish puberulent or finely pubescent; stems 1°-3 1/2° tall, often widely branched. Leaf-blades of the lower part of the stem pin-natifid and their segments entire, merely serrate and much smaller above; calyx-tube 2 1/2"-3" broad during anthesis; calyx-lobes linear-lanceolate to lanceolate, entire; corolla 1'- 1 2/3' long; capsules ovoid or globose-ovoid, 5"-7 1/2" long, short-beaked.
In dry soil, Missouri to Louisiana and Texas. July-Sept.
Gerardia grandiflora Benth. Comp. Bot. Mag. 1: 206.
1835. D. Drummondii Benth. in DC. Prodr. 10: 520. 1846. D. grandiflora Wood, Bot. & Flor. 231. 1873.
Perennial, cinereous-puberulent and roughish; stem much branched, very leafy to the top, 2°-3° high, the branches ascending or spreading. Leaves short-petioled, thin, ovate or ovate-lanceolate in outline, all pinnatifid or deeply incised, 2'-4' long, the lobes acute or obtuse, serrate, or nearly entire; upper leaves smaller, sessile; pedicels, even in fruit, shorter than the calyx; calyx-lobes oblong or ovate, dentate or entire, about as long as the tube; corolla 1 1/2'-2' long, glabrous without, its tube much expanded above.
In dry woods and thickets, Minnesota and Wisconsin to Tennessee, Kansas and Texas. July-Aug.
Gerardia laevigata Raf. Ann. Nat. 13. 1820. Dasystoma quercifolia var. integrifolia Benth. in DC. Prodr. 10: 520. 1846. Dasystoma laevigata Raf.; Chapm. Fl. S. States, Ed. 2, 636. 1883.
Perennial, glabrous or very nearly so, not glaucous; stem strict, simple, or sparingly branched, 1°-3° high, the branches ascending. Leaves usually all petioled, lanceolate or ovate-lanceolate, 1 1/2' - 4' long, entire, or the lowest dentate or incised; pedicels shorter than the calyx, or in fruit longer; calyx-lobes ovate-lanceolate, equalling or shorter than the tube; corolla glabrous without, 1' - 1 1/2' long, the limb fully as broad, the tube much expanded above; capsule glabrous, twice as long as the calyx.
In dry thickets, Pennsylvania to Michigan, Georgia and Missouri. July-Aug.
Rhinanthus virginicus L. Sp. Pl. 603. 1753. Gerardia quercifolia Pursh, Fl. Am. Sept. 423. pl. 19.
1814. D. quercifolia Benth, in DC. Prodr. 10: 520. 1846. D. virginica Britton, Mem. Torr. Club 5: 295. 1894
Perennial, glabrous and glaucous; stem strict, rather stout, usually branched, 3°-6° high, the branches ascending. Leaves usually all petioled, ovate or ovate-lanceolate in outline, the lower 1-2-pinnatifid, 4'-6' long, the upper pinnatifid or deeply incised, the lobes lanceolate or oblong, acute, entire, or dentate; fruiting pedicels longer than the calyx; calyx-lobes ovate or ovate-lanceolate, acute, entire, about equalling the tube; corolla 11/2'-2' long, glabrous outside, its tube not widely expanded above; capsule glabrous, twice as long as the calyx.
In dry or moist woods, Maine to Minnesota, south to Florida and Illinois. Golden-oak. July-Sept.
Dasystoma calycosa Mackenzie & Bush has been distinguished from D. virginica by its more finely divided leaves, its elongate spreading branches and its long and narrow calyx-lobes; it occurs in Missouri and Arkansas.