20. Wistaria. Pod tumid, marginless. Woody twiners; leaflets obscurely stipellate.
c. Standard narrow, erect; pod turgid or inflated; perennial herbs.
21. Astragalus. Keel not tipped with a point or sharp appendage. Pod with one or both the sutures turned in, sometimes dividing the cell lengthwise into two.
22. Oxytropis. Keel tipped with an erect point; otherwise as Astragalus.
23. Glycyrrhiza. Flowers, etc., of Astragalus. Anther-cells confluent. Pod prickly or muricate, short, nearly indehiscent.
[+][+][+] Herbs with pinnate or pinnately 1–3-foliolate leaves; no tendrils; pod transversely 2–several-jointed, the reticulated 1-seeded joints indehiscent, or sometimes reduced to one such joint. (Hedysareæ.)
[=] Leaves pinnate, with several leaflets, not stipellate.
24. Æschynomene. Stamens equally diadelphous (5 and 5). Calyx 2-lipped. Pod several-jointed; joints square.
25. Coronilla. Stamens unequally diadelphous (9 and 1). Calyx 5-toothed. Joints oblong, 4-angled. Flowers umbellate.
26. Hedysarum. Stamens unequally diadelphous (9 and 1). Calyx 5-cleft. Pod several-jointed; joints roundish.