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..
Bot. Mag. 1: 23. 1835. Meibomia canescens hirsuta Vail, Bull. Torr. Club 19: 111. 1892.
Erect, much branched, densely short- or villous-pubescent, 3°-5° high. Stipules ovate, acuminate, somewhat cordate, persistent; leaves petioled; leaflets ovate, obtuse or acut-ish, 1'-4' long, about as long as the petioles, scabrous above, pubescent beneath, ciliate, the terminal one commonly rhomboid and larger than the lateral ones; racemes terminal, compound; bracts deciduous; upper lobe of the calyx 2-toothed, the others attenuate; flowers 2"-2i" long; loment 4-6-jointed, joints longer than wide, unequally rhomboid, 4"-6" long; stipe about equalling the upper lobe of the calyx.
In rich soil Ontario to Massachusetts, Florida, Minnesota, Arkansas and Texas. July-Sept.
Hedysarum bracteosum Michx. Fl. Bor. Am. 2: 73.
1803. Desmodium bracteosum DC. Prodr. 2: 329. 1825. Desmodium cuspidatum Hook. Comp. Bot. Mag. 1: 23.
1835. Desmodium canadense var. longifolium T. & G. Fl.
N. A. 1: 365. 1838. Meibomia bracteosa Kuntze, Rev. Gen. Pl. 195. 1891. Meibomia longifolia Vail, Bull. Torr. Club 23: 140.
Erect, 2°-6° high, glabrous or pubescent below, the panicle finely pubescent. Stipules lanceolate, cuspidate, somewhat cordate, deciduous or persistent; leaves petioled; leaflets 2'-8' long, longer than the petioles, ovate or ovate-lanceolate, acuminate, glabrous or very nearly so above, often pubescent beneath; flowers large, purple, 4"-5" long; bracts deciduous, cuspidate, striate; calyx deeply 2-lipped, the upper lobe 2-toothed, the others acute; loment 1'-3' long, 3-7-jointed, the joints obliquely oblong, about twice as long as wide, uncinate-pubescent; stipe about the length of the lower calyx-lobes.
In thickets, Maine to Ontario, Minnesota, Florida, Missouri, Arkansas and Texas. Aug.-Sept.
Hedysarum paniculatum L. Sp. Pl. 749. 1753. Desmodium paniculatum DC. Prodr. 2: 329. 1825. Desmodium paniculatum var. angustifolium T. & G. Fl.
N. A. 1: 364. 1838. Desmodium paniculatum var. pubens T. & G. Fl. N. A.
Erect, slender, glabrous or more, or less pubescent, 2°-4° high. Stipules small, subulate, mainly deciduous; leaves petioled; leaflets oblong-lanceolate to linear-lanceolate, obtuse or acute, l'-2' long; racemes terminal, compound; bracts deciduous; upper calyx-lobe deeply 2-toothed, the 3 lower ones attenuate, with the middle one elongated; flowers purple, 3"-4" long; loment 1' long or more, 4-6-jointed, the joints obliquely triangular or rhomboid, minutely uncinate-pubescent; stipe nearly equalling the lower lobes of the calyx. In dry soil, Ontario to Minnesota, Maine. Massachusetts, Florida and Texas. Consists of several races, differing in width of leaflets and in pubescence. July-Sept.