LEGUMINOSJ. (PULSE FAMILY.) 89 
* Flowers perfect and staminate. Petals united. 
45. MIMOSA. Filaments distinct. Legume jointed, flat. 
46. SCHRANKIA. Filaments distinct. Legume not jointed, echinate. 
47. PITHECOLOBIUM. Filaments united into a tube below. Legume broad and flat, mealy 
or pulpy within. ' 
* * Flowers perfect and neutral. Petals distinct. 
48. DESMANTHUS. Sterile filaments filiform. Legume linear, many-seeded. 
49. NEPTUNIA. Sterile filaments flat or petal-like. Legume oblong, few-seeded. 
SUBORDER I. PAPILIONACE/E. Putse FAMILY. 
1. CROTALARIA, L. Kirk 
Calyx 5-lobed. "Vexillum cordate: keel faleate. Stamens monadelphous. 
Antheys alternately oblong and roundish. Capsule inflated, oblong, many- 
seeded. — Low herbs, with simple leaves; the upper ones with broad decurrent 
inversely sagittate stipules. Racemes opposite the leaves. Flowers. yellow. 
Legumes dark-purple. 
1. C. sagittalis, L. Annual; stems low, branching, shaggy with rust- 
colored spreading hairs; leaves nearly sessile, oval or oblong, hairy ; racemes 
short, 2 - 3-flowered. — Barren sandy soil, Florida and northward. June and 
July. — Stem 3' -6' high. Racemes 2! - 3! long. 
2. C. ovalis, Pursh. Perennial; stems several, branching, prostrate or as- 
cending, rough with appressed hairs; leaves short-petioled, oval or oblong, hairy ; 
racemes long, 3 — 6-flowered.— Dry pine barrens, Florida to North Carolina, and 
westward. May-July. — Stem 6'-12' high. Racemes 4'—6'long. Flowers 
distant. $ 
8. C. Purshii, DC. Perennial; stems slender, erect, roughened with scat- 
tered appressed hairs; leaves thick, smooth above, the lower ones oblong, the 
upper linear; racemes long, 5 — 10-flowered. — Flat grassy pine barrens, Florida 
to South Carolina, and westward. May and June. — Stem 12'- 18/ high. Ra- 
cemes 6'-12'long. Flowers distant. 
: 2. LUPINUS, Tourn. Lorine. 
Calyx 2-lipped, 5-toothed. Vexillum with the sides reflexed. Keel falcate, 
acute. Stamens monadelphous, with alternate anthers oblong and roundish. 
Capsule oblong, compressed, many-seeded ; the seeds often separated by cellular 
partitions. — Herbs, with simple or palmately 5- many-foliolate leaves, and - 
showy flowers in terminal racemes. E 
1. L. perennis, L. Stem pubescent, erect ; leaves palmately 7-9-folo- . 
late ; leaflets obovate-oblong, obtuse, more or less hairy ; stipules minute ; ra- 
cemes long, loosely many-flowered ; flowers purplish or purplish-blue, rarely - 
_ White. — Var. Gracriis (L. gracilis, Nutt.) is a more slender and hairy form, — = i 
with smaller and. narrower, often acute leaflets, — Dry sandy soil, Florida 
Mississippi, and northward. : Apriland May, y — Stem 1? - 1j? high. 
