LKOL'MINOS/E. (I'lLSE FAMILY.) 89 



* Flowers perfect and staminate. Petals united. 



45. MIMOSA. Filaments distinct. Legume jointed, flat. 



46. SCURANKIA. Filaments distinct. Legume not jointed, echinate. 



47. PITHECOLOBIUM. Filaments united ioto a tube below. Legume broad and flat, mealy 



or pulpy within 



* * Flowers perfect and neutral. Petals distinct. 

 48 DESMANTIIUS. Sterile filaments filiform. Legume linear, many-seeded. 

 49. NEPTUNIA. Sterile filaments flat or petal-like Legume oblong, fuw-.sceded. 



Suborder I. PAPILIONACE^. Pulse Family. 

 1. CROTALARIA, L. Rattle-box. 



Calyx 5-lobcd. Vexillum cordate : keel falcate. Stamens monadclplious. 

 Anthers alternately oblong and roundish. Capsule inflated, oblong-, many- 

 seeded. — Low herbs, with simple leaves : the upper ones with broad decurrcnt 

 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 oldong, 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 witli appresscd hairs ; leaves short-pctioled, oval or oblong, hairy ; 

 racemes long, 3 - 6-flowered — Dry pine barrens, Florida to Xorth Carolina, and 

 westward. May -July. — Stem 6'- 12' high. Racemes 4'- C long. Flowers 

 distant. 



3. C. Purshii, DC. Perennial; stems slender, erect, roughened with scat- 

 tered appresscd hairs ; leaves thick, smooth above, tlic lower ones oblong, tlie 

 upper linear ; racemes long, .'S - 10-flowcred. — Flat grassy j;ine barrens, Florida 

 to South Carolina, and westward. May and June. — Stem li;'- 18' high. Ra- 

 cemes 6' -12' long. Flowers distant. 



2. LUPINUS, Tourn. Lupine. 

 Calyx 2-lipped, 5-toothed. Vexillum with the sides reflexcd. Keel f.dcate, 

 acnte. Stamens monadelphous, with alternate anthers oblong and roundish. 

 Capsule oblong, compressed, many-seeded; the seeds often separated by cellular 

 partitions. — Herbs, with simple or palmatcly 5 - many-foliolate leaves, and 

 showy flowers in terminal racemes. 



1. L. perennis, L. Stem pubescent, erect; leaves palmatcly 7 -9-folio- 

 late ; leaflets obovatc-oblong, obtuse, more or less hairy ; stipules minute ; ra- 

 cemes long, loosely many-flowered ; flowers purplish or purplish-blue, rarely 

 white. — Var. gracilis (L. gracilis, Nult.) is a more slender and hairy form, 

 with smaller and narrower, often acute leaflets. — Dry sandy soil, Florida to 

 Mississip[ii, and northward. April and IMay. l]. — Stem 1°-H° high. 



2. L. villosus, Willd. — Biennial ; villous and hoary ; stems thick, pros- 

 trate or ascending ; leaves simple, lanceolate-oblong, mostly acute, long-petioled ; 



