126 LEGUMINOS^E. (PULSE FAMILY.) 



1. LUPIN ITS, 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 

 l-15-foliolate leaves, stipules adnate to base of the petiole, 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. per6nnis, L. (WILD LUPINE.) Perennial, somewhat hairy ; stem 

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

 very hairy. Sandy soil : common. May, June. Flowers showy, purplish- 

 blue, rarely pale. 



2. CROTALARIA, 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 yellow. (Name from KporaAoi/, a rattle; the loose 

 seeds rattling in the coriaceous inflated pods.) 



1. C. sagitt&lis, 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, Mass, to Virginia near the coast, Illinois and south- 

 ward. July. 



3. GENISTA, L. Wo AD-WAXEN. WHIN. 



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

 deflexed. Stamens monadelphous, the sheath entire ; 5 alternate anthers 

 shorter. Pod mostly flat and several-seeded. Shrubby plants, with simple 

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



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

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

 Eastern New York and Massachusetts, especially Essex Co., where it is thor- 

 oughly established on sterile hills. June. (Adv. from Eu.) 



4. TRIFOLIUM, L. CLOVER. TREFOIL. 



Calyx persistent, 5-cleft, the teeth bristle-form. Corolla mostly withering or 

 persistent ; the claws of all the petals, or of all except the oblong or ovate 

 standard, more or less united below with the stamen-tube : keel short and 

 obtuse. Tenth stamen more or less separate. Pods small and membranous, 

 often included in the calyx, 1 - 6-seeded, indehiscent, or opening by one of the 

 sutures. Tufted or diffuse herbs. Leaves mostly palmately, sometimes pin- 

 nately 3-foliolate : leaflets often toothed. Stipules united with the petiole. 

 Flowers in heads or spikes. (Name from tres, three, and. folium, a leaf.) 

 * Flowers sessile in dense heads: corolla purple or purplish, withering away after 

 flowering, tubular below ; the petals more or less coherent with each other. 



