90 LEGUMINOS&. (PULSE FAMILY.) 
stipules linear-subulate, elongated, adnate below to the petioles ; racemes erect, 
densely many-flowered ; flowers pale red, the vexillum dark purple in the 
centre; legume very woolly. — Dry sandy barrens, Florida to North Carolina. 
April. — Stems 19-29 long. Leaves (with the petiole) 6/-8' long. 
3. L. diffusus, Nutt. Perennial ; silky-tomentose and hoary ; stems pros- 
trate or erect, much branched ; leaves simple, oblong or obovate, obtuse, short- 
petioled ; stipules short, often wanting on the branches; racemes many-flowered ; 
flowers blue, the vexillum dark purple in the centre; legume woolly. -— Dry 
sand-ridges, Florida to North Carolina. April and May. — Stems 1? - 2° high. 
Leaves 2!- 4! long. 
3. MEDICAGO, L. 
Calyx 5-cleft; the lobes subulate or setaceous. Corolla deciduous. Vexillum 
longer than the partly united wings and keel. Stamens 10, diadelphous (9 & 
1), equal. Style smooth. Legume falcate or coiled, 1 -many-seeded. — — Herbs 
or shrubs. Leaves trifoliolate. Stipules adnate to the petioles, mostly incised. 
Flowers yellow, in axillary spikes. 
1. M. lupulina, L.  Pubescent; stem procumbent ; leaflets obovate, 
toothed ; stipules nearly entire; spikes globose, many-flowered ; flowers mi- 
nute ; legumes reniform, 1-seeded, black. — Waste places, Florida aud north- 
ward. Introduced. (1) — Stem 1? - 2? long. 
4. MELILOTUS, Toum. MELILOT. SWEET CLOVER: 
Calyx 5-toothed ; the teeth long and equal. Corolla deciduous. Wings and 
keel cohering. Stamens diadelphous (9 & 1). Legume ovoid, coriaceous, 
veiny or rugose, longer than the calyx, 1-4-seeded, scarcely dehiscent. — 
Smooth herbs. Leaves trifoliolate. Leaflets often toothed. Stipules adnate to 
the petioles. Flowers yellow or white, in axillary racemes. 
1. M. offieinalis, Willd. Stem erect, branching ; leaflets obovate-oblong, 
toothed ; flowers yellow; vexillum striped with brown, as long as the keel and 
wings; legume obovate, rugose. — Cultivated ground. Introduced. @ and @ 
— Stems 1°-3° high. Legumes drooping, 2-seeded. 
2. M. alba, Lam. Stem erect, branching; leaflets oblong, truncate, ser- 
rate; racemes elongated; flowers white; vexillum longer than the wings and keel; 
legumes ovate, rugose, 1-seeded. - (M. leucantha, Koch. ) — Cultivated grounds. 
Téttedneed. C — Legumes drooping. 
iy TRIFOLIUM, L.  Crovxn. 
dati. the teeth subulate or setaceous. Corolla withering or persist- 
ent ; the keel shorter than the wings, and united with them by their claws. Sta- 
mens diadelphous (9 & 1). Legume smooth, membranaceous, 1—6-seeded, often — — 
shorter than the ca eriy debitum o DAS Mo bets. Leaves — 
