Calyx 5-toothed. Standard orbicular; keel incurved. Stamens diadelphous, 9 and 1. Pod terete or 4-angled, jointed; the joints oblong.—Glabrous herbs or shrubs, with pinnate leaves, and the flowers in umbels terminating axillary peduncles. (Diminutive of corona, a crown, alluding to the inflorescence.)
C. vària, L. A perennial herb with ascending stems; leaves sessile; leaflets 15–25, oblong; flowers rose-color; pods coriaceous, 3–7-jointed, the 4 angled joints 3–4´´ long.—Conn. to N. J. (Nat. from Eu.)
26. HEDÝSARUM, Tourn.
Calyx 5-cleft, the lobes awl-shaped and nearly equal. Keel nearly straight, obliquely truncate, not appendaged, longer than the wings. Stamens diadelphous, 5 and 1. Pod flattened, composed of several equal-sided separable roundish joints connected in the middle.—Perennial herbs; leaves odd-pinnate. (Name composed of ἡδύς, sweet, and ἄρομα, smell.)
1. H. boreàle, Nutt. Leaflets 13–21, oblong or lanceolate, nearly glabrous; stipules scaly, united opposite the petiole; raceme of many deflexed purple flowers; standard shorter than the keel; joints of the pod 3 or 4, smooth, reticulated.—Lab. to northern Maine and Vt.; north shore of L. Superior, and north and westward.
27. DESMÒDIUM, Desv. Tick-Trefoil.
Calyx usually more or less 2 lipped. Standard obovate; wings adherent to the straight or straightish and usually truncate keel, by means of a little transverse appendage on each side of the latter. Stamens diadelphous, 9 and 1, or monadelphous below. Pod flat, deeply lobed on the lower margin, separating into few or many flat reticulated joints (mostly roughened with minute hooked hairs, by which they adhere to the fleece of animals or to clothing).—Perennial herbs, with pinnately 3-foliolate (rarely 1-foliolate) leaves, stipellate. Flowers (in summer) in axillary or terminal racemes, often panicled, and 2 or 3 from each bract, purple or purplish, often turning green in withering. Stipules and bracts scale-like, often striate. (Name from δεσμός, a bond or chain, from the connected joints of the pods.)
§ 1. Pod raised on a stalk (stipe) many times longer than the slightly toothed calyx and nearly as long as the pedicel, straightish on the upper margin, deeply sinuate on the lower; the 1–4 joints mostly half-obovate and concave on the back; stamens monadelphous below; plants nearly glabrous; stems erect or ascending; raceme terminal, panicled; stipules bristle-form, deciduous.
1. D. nudiflòrum, DC. Leaves all crowded at the summit of sterile stems; leaflets broadly ovate, bluntish, whitish beneath; raceme elongated on an ascending mostly leafless stalk or scape from the root, 2° long.—Dry woods, common.
2. D. acuminàtum, DC. Leaves all crowded at the summit of the stem from which arises the elongated naked raceme or panicle; leaflets round-ovate, taper-pointed, green both sides, the end one round (4–5´ long).—Rich woods, from Canada to the Gulf.