This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", 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..
Stems erect or ascending, slender, appressed-pubescent with rather long hairs or somewhat pilose, 1 1/2°-2 1/2° high. Leaflets oblong or linear-oblong, 1 1/2' long or less, obtuse and mucronate at the apex, sparingly appressed-pubescent above, densely so beneath; petaliferous flowers short-racemose on slender peduncles longer than the leaves; calyx 3"-4" long, about two-thirds as long as the corolla and the oval acute somewhat pubescent pod.
L. Brittonii Bicknell, Torreya 1: 103. 1901.
Stems ascending, finely pubescent or tomen-tose at least above, 4° long or less. Leaves short-petioled; leaflets firm in texture, oblong to elliptic, obtuse, mucronulate, 3/4'-2' long, finely pubescent or glabrate above, densely velvety-pubescent beneath; peduncles longer than the leaves or some of them shorter, tomentose; flowers short-racemose; corolla purple and pink, 3"-4" long, somewhat longer than the calyx; pods of petaliferous flowers ovate-elliptic, acute, pubescent, twice as long as the calyx.
Dry woodlands and borders of woods. Massachusetts to New Jersey and Maryland. Aug.-Sept.
Lespedeza Nuttallii Darl. Fl. Cest. Ed. 2, 420. 1837.
Erect or ascending, simple or branched, more or less pubescent, 2°-3° high. Stipules subulate; petioles shorter than the leaves; leaflets oval, obovate or suborbicular, thickish, obtuse or emarginate at the apex, narrowed or sometimes rounded at the base, dark green and glabrous or nearly so above, pubescent beneath, 4"-2o" long, 3"-10" wide; peduncles mostly exceeding the leaves; inflorescence capitate, or spicate, dense; flowers violet-purple, about 3" long; pod oblong, or oval, acuminate or acute at each end, very pubescent, 2 1/2"-3" long, longer than the calyx.
Dry soil, southern New Hampshire and New York to Michigan, Florida and Kansas. Aug.-Sept.
L. acuticarpa Mackenzie & Bush, Trans. Acad. Sci. St. Louis 12: 16. 1902.
Stems ascending, slender, 2° long or less, glabrate to quite densely pubescent. Leaflets oblong to oblong-elliptic, 1/2'-l' long, 2"-5" wide, obtuse or acutish and mucronate, glabrate above, appressed-pubescent beneath; pet-aliferous flowers few, racemose, spicate at the ends of peduncles which are very slender and longer than the leaves; corolla purplish, 3"-4" long, a little longer than the calyx; pods of petaliferous flowers oval, acute or acuminate, sparingly pubescent, twice as long as the calyx, those of apetalous flowers less acute, much longer than the calyx.
Dry soil, Tennessee to Missouri and Arkansas. Aug.-Sept.