LEGUMINOS^E. (PULSE FAMILY.) 91 



SUBORDER III. MIMOSEJS. THE MIMOSA FAMILY. 



Corolla valvate in aestivation, often united into a 4 - 5-lobed cup, hypogy- 

 nous, as are the (often very numerous) stamens, regular. Embryo straight. 

 Leaves twice or thrice pinnate. 



85. DESMANTHUS. Petals distinct. Stamens 5 -10. Pod smooth. 



86. SCHRANKIA. Petals united below into a cup. Stamens 8 or 10. Pod covered with 



small prickles or rough projections. 



SUBORDER I. PAPIJLIONACEJE. THE PROPER PULSE FAMILY. 



1. L, UP i NITS, Tourn. LUPINE. 



Calyx very deeply 2-lipped. Sides of the standard reflexed: keel scythe- 

 shaped, pointed. Sheath of the monadelphous stamens entire : anthers alter- 

 nately oblong and roundish. Pod oblong, flattened, often knotty by constric- 

 tions between the seeds. Cotyledons thick and fleshy. Herbs, with palmately 

 1 - 15-foliolate leaves, and showy flowers in terminal racemes or spikes. (Name 

 from Lupus, a wolf, because these plants were thought to devour the fertility of 

 the soil.) 



1. L*. perennis, L. (WILD LUPINE.) Somewhat hairy; stem erect 

 (l-2); leaflets 7-11, oblanceolate ; flowers in a long and loose raceme, 

 pods very hairy. 1J. Sandy soil, common. June. Flowers showy, purplish- 

 blue, rarely pale or white. Some S. European Lupines in gardens, and others 

 from Oregon have recently been introduced, especially L. polyphyllus. 



2. CROTALiARIA, L. BATTLE-BOX. 



Calyx 5-cleft, scarcely 2-lipped. Standard large, heart-shaped : keel scythe- 

 shaped. Sheath of the monadelphous stamens cleft on the upper side : 5 of the 

 anthers smaller and roundish. Pod inflated, oblong, many-seeded. Herbs 

 with simple leaves. Flowers racemed, yellow. (Name from /tporaAoi/, a rattle ; 

 the loose seeds rattling in the coriaceous inflated pods.) 



1. C. Sagittalis, L. Annual, hairy (3' -6' high) ; leaves oval or oblong- 

 lanceolate, scarcely petioled ; stipules united and decurrent on the stem, so as 

 to be inversely arrow-shaped ; peduncles few-flowered ; corolla not longer than 

 the calyx. Sandy soil, Massachusetts to Virginia near the coast, and south- 

 ward. July. 



3. GENISTA, L. WOAD-WAXEN. WHIN. 



Calyx 2-lipped. Standard oblong-oval, spreading: keel oblong, straight, 

 scarcely enclosing the stamens and style. Stamens monadelphous, the sheath 

 entire ; 5 alternate anthers shorter. Pod flat, several-seeded. Shrubby plants, 

 with simple leaves, and yellow flowers. (Name from the Celtic gen, a bush.) 



1. O. TINCT6RIA, L. (DYER'S GREEN-WEED.) Low, not thorny, with 

 Btriate-angled erect branches ; leaves lanceolate ; flowers in spiked racemes. 



