47a. Plants prostrate; racemes panicled; leaflets nearly circular =Tick Trefoil, Desmodium rotundifolium.= 47b. Plants decumbent or ascending; racemes short, simple, few-flowered; stipules ovate (stems 4-8 dm. long) =Tick Trefoil, Desmodium pauciflorum.= 47c. Plants erect or ascending; racemes panicled --48. 48a. Leaflets of an oblong type, broadest at or near the middle, and about 4 times as long as broad (5-10 dm. tall) --49. 48b. Leaflets of an ovate or lanceolate type, broadest below the middle, and not more than 3 times as long as wide --50. 49a. Stem pubescent; leaves sessile or nearly so =Tick Trefoil, Desmodium sessilifolium.= 49b. Stem glabrous or nearly so; leaves obviously petioled =Tick Trefoil, Desmodium paniculatum.= 50a. Stipules lanceolate to ovate, 1 cm. long or more (6-15 dm. high) --51. 50b. Stipules narrowly lanceolate or subulate, less than 1 cm. long --54. 51a. Stems glabrous or minutely pubescent; leaves acuminate --52. 51b. Stems hispid or densely pubescent; leaves ovate or ovate-lanceolate, obtuse or barely acute --53. 52a. Leaves glabrous on both sides =Tick Trefoil, Desmodium bracteosum.= 52b. Leaves rough above, hairy beneath =Tick Trefoil, Desmodium bracteosum var. longifolium.= 53a. Leaflets broadly ovate =Tick Trefoil, Desmodium canescens.= 53b. Leaflets ovate-lanceolate =Tick Trefoil, Desmodium illinoense.= 54a. Flowers 10-12 mm. long (1-2 m. high) =Tick Trefoil, Desmodium canadense.= 54b. Flowers 5-8 mm. long (5-8 dm. tall) --55. 54c. Flowers 3-4 mm. long (4-8 dm. tall) --56. 55a. Leaflets broadly ovate =Tick Trefoil, Desmodium viridiflorum.= 55b. Leaflets oblong-ovate =Tick Trefoil, Desmodium dillenii.= 56a. Leaflets 3-5 cm. long, oblong-ovate, scabrous above =Tick Trefoil, Desmodium rigidum.= 56b. Leaflets 1-2.5 cm. long, broadly ovate or oval, not scabrous above --57. 57a. Stem and leaves glabrous or very nearly so =Tick Trefoil, Desmodium marilandicum.= 57b. Stem and leaves conspicuously pubescent =Tick Trefoil, Desmodium obtusum.= 58a. Flower-clusters sessile, or on peduncles shorter than the subtending leaves --59. 58b. Flower-clusters, or many of them, on peduncles longer than the leaves --61. 59a. Leaves linear-oblong =Bush Clover, Lespedeza virginica.= 59b. Leaves ovate or oval --60. 60a. Leaves and stem velvety or downy =Bush Clover, Lespedeza stuvei.=