14. D. stríctum, DC. Stem very straight and slender, simple (2–3° high), the upper part and narrow panicle rough-glandular; leaflets linear, blunt, strongly reticulated, thickish, very smooth (1–2´ long, ¼´ wide); joints of the pod 1–3, semi-obovate or very gibbous (only 2´´ long).—Pine woods, N. J. to Fla. and La.
[*][*][*] Stipules small and inconspicuous, mostly deciduous; pods of few roundish or obliquely oval or sometimes roundish-rhomboidal joints, 1½–2½´´ long.
[+] Stems erect; bracts before flowering conspicuous; racemes densely flowered.
15. D. Canadénse, DC. Stem hairy (3–6° high); leaflets oblong-lanceolate or ovate-lanceolate, obtuse, with numerous straightish veins, much longer than the petiole (1½–3´ long); flowers showy, larger than in any other species (½–{1/3}´ long).—Dry rich woods, N. Brunswick to N. C., Minn., and Kan.
16. D. sessilifòlium, Torr. & Gray. Stem pubescent (2–4° high); leaves nearly sessile; leaflets linear or linear-oblong, blunt, thickish, reticulated, rough above, downy beneath; branches of the panicle long; flowers small.—Copses, Penn. and Ky., west to Mich., Iowa, Mo., and Tex.
[+][+] Stems ascending (1–3° high); bracts small; racemes or panicles elongated and loosely flowered; flowers small.
17. D. rígidum, DC. Stem branching, somewhat hoary, like the lower surface of the leaves, with a close roughish pubescence; leaflets ovate-oblong, blunt, thickish, reticulated-veiny, rather rough above, the lateral ones longer than the petiole.—Dry hillsides, Mass. to Fla., west to Mich., Mo., and La.
18. D. ciliàre, DC. Stem slender, hairy or rough-pubescent; leaves crowded, on very short hairy petioles; leaflets round-ovate or oval, thickish, more or less hairy on the margins and underneath (½–1´ long).—Dry hills and sandy fields, N. Eng. to Fla., west to Mich., Mo., and Tex.
19. D. Marilándicum, F. Boott. Nearly smooth throughout, slender; leaflets ovate or roundish, very obtuse, thin, the lateral ones about the length of the slender petiole; otherwise resembling the preceding.—Copses, N. Eng. to Fla., west to Mich., Mo., and La.
[+][+][+] Stems reclining or prostrate; racemes loosely flowered.