53 6 FLORA. 



5. CROTALARIA L. 



Herbs, sometimes slightly woody, with simple (or in some tropical species 3-7- 

 foliolate) leaves and racemose yellow flowers. Calyx 5 -toothed, slightly 2-lipped; 

 standard orbicular or ovate, often cordate ; wings oblong or obovate; keel curved. 

 Stamens monadelphous, their sheath deeply cleft; anthers of 2 forms, alternating 

 with each other, the one small, versatile, the other larger; style more or less 

 curved; pod oblong or globose, inflated, many-seeded, the seeds loose at matur- 

 ity. [Greek, a rattle.] About 250 species, mainly of tropical regions. Besides 

 the following some 7 others occur in the southern U. S. 



Stem and branches erect or ascending ; leaves, at least the upper, lanceolate or oblong. 



i. C. sagittalis. 

 Stems prostrate, from a deep root ; leaves broadly oval. 2. C. rotundifolia. 



1. Crotalaria sagittalis L. RATTLE-BOX. (I. F. f. 2055.) Annual, or 

 perennial (?), villous-pubescent, rarely over 3 dm. high. Leaves simple, oval, 

 lanceolate or oblong, rounded at the base, nearly sessile, 2-6 cm. long, stipules per- 

 sistent and united, decurrent on the stem, sagittate above, or the lower wanting ; 

 peduncles 2-10 cm. long, 2-4-flowered; pedicels 3-6 mm. long; flowers 8-12 mm. 

 long, the corolla about equalling the calyx ; pod oblong, glabrous, nearly sessile, 

 2.5 cm. long, 8-10 mm. in thickness, much inflated, nearly black at maturity; 

 seeds shining. In dry, open places, northern N. Eng. to Fla., S. Dak., Ark. and 

 Mex. June-Sept. 



2. Crotalaria rotundifolia (Walt.) Poir. PROSTRATE RATTLE-BOX. (I. F. f. 

 2056.) Perennial by a deep root, the slender branches usually prostrate. Pu- 

 bescence mostly dense, brownish, appressed; leaves broadly oblong or oval, obtuse, 

 paler beneath, 1-4 cm. long; petioles 24 mm. long; upper stipules sagittate; 

 peduncles lateral, 5-15 cm. long, slender, 2-6-flowered; flowers 12-15 mm - l n gl 

 corolla little longer than the calyx; pod nearly as in the preceding. Mostly in dry 

 soil, S. Va. to Fla. and Miss. May-Aug. 



v 

 6. LUPINUS L. 



Herbs, rarely shrubs, with digitately-compound 7-i5-foliolate (rarely simple or 

 3-5-foliolate) leaves, and showy flowers in terminal spikes or racemes. Calyx 

 deeply toothed and 2-lipped. Standard orbicular or ovate, its margins reflexed ; 

 wings oblong or obovate; keel incurved, sometimes beaked. Stamens monadel- 

 phous. their sheath not cleft; anthers of two forms as in Crotalaria. Ovary sessile; 

 style incurved ; pot flattened, generally constricted between the seeds, the valves 

 coriaceous. [Latin name of some pulse, from lupus, wolf.] Over 100 species, 

 mainly natives of temperate and warm regions. About 70 occur in N. Am., 

 mainly on the western side of the continent. 



Perennial ; flowers 14-18 mm. long ; leaflets oblanceolate. 



Corolla blue, pink or white, the standard not spotted. i. L. perennis. 



Corolla blue, with a conspicuous dark spot on the standard. 2. L. Plattensis. 



Perennial : flowers 8-12 mm. long ; leaflets oblong-linear. 3. L. argenteus. 



Annual ; leaflets mainly oblong ; pod 2-seeded. 4. L. pusillus. 



1. Lupinus perennis L. WILD LUPINE. (I. F. f. 2057.) Erect, more or 

 less pubescent, 3-6 dm. high. Leaves slender-petioled, 5-8 cm. broad, leaflets 

 7-11 (commonly about 8), sessile or nearly so, obtuse and mucronate, 2-4 cm. long, 

 appressed-pubescent or glabrate ; raceme terminal, peduncled. 15-25 cm. long, 

 loosely flowered; flowers 12-15 mm - ' on g: Pd linear-oblong, pubescent, 4 cm. 

 long, usually 4-5-seeded. the valves coiling at dehiscence; style subulate. In dry, 

 sandy soil, Me. and Ont. to Minn., Fla., Mo. and La. May-June. 



Lupinus perennis occidentalis S. Wats. Villous-pubescent all over. Mich, arid 

 Wis. 



2. Lupinus Plattensis S. Wats. NEBRASKA LUPINE. (I. F. f. 2058.) 

 Resembles the preceding, 3-5 dm. high, villous or appressed-pubescent, the 

 living plant with a glaucous appearance ; leaflets 7-10, oblanceolate, spatulate or 

 narrowly oval, 1.5-4 cm. long, 5-10 mm. wide; raceme terminal, 1-2 dm. lona, 

 loosely flowered; corolla 12-15 mm. long. Plains, Neb., Wyo. and Dak. June- 

 July. 



