FABACEAE 603 



8. Crotalaria pumila Ortega. Perennial, minutely pubescent or glabrate. Stems 

 several together, often branched throughout, 1-9 dm. long, decumbent : leaves numerous : 

 leaflets 3, the blades cuneate to oblong-cuneate, 0.5-1.5 cm. long, mostly emarginate, the 

 terminal one longer than the petiole : calyx becoming 4 or 5 mm. long : corolla yellowish ; 

 standard less than 10 mm. long : pods 1-1.5 cm. long. 



In sand, peninsular Florida and the Keys. Also in tropical America. 



6. LUPINUS L. 



Annual or perennial herbs or shrubby plants, with erect or prostrate stems. Leaves 

 alternate, with stipules at the base of the petioles : blades 1-foliolate, or usually digitately 

 5-15-foliolate or rarely 3-foliolate. Flowers perfect, in terminal racemes. Calyx 2- 

 lipped, the upper lip of 2 partially united sepals, the lower lip of 3 partially or wholly 

 united sepals. Corolla of various colors : standard broad with recurved margins : wings 

 more or less curved : keel scythe-shaped. Stamens monadelphous. Anthers alternately 

 small and versatile. Style curved. Ovules 2-many. Pod flattened, 2-valved. LUPINE. 



Leaf-blades palmately several-foliolate. 



Leaflets 7-11 : plants perennial. 1. L. perennis. 



Leaflets 5 : plants annual or biennial. 



Leaflets with cuneate, truncate blades : corollas 1 cm. long or shorter. 2. L. subcarnosus. 



Leaflets oblanceolate, elliptic or obovate-oblanceolate blades, not truncate : 



corolla 1 cm. long or longer. 3. L. Texfnsis. 



Leaf-blades 1-foliolate. 



Biennial : corolla mainly blue. 4. L. diffusus. 



Perennial : corolla mainly red. 5. L. villosu*. 



1. Lupinus perennis L. Perennial, more or less pubescent. Stems solitary or several 

 together, ascending or erect, 2-6 dm. long, simple or sparingly branched : leaves spread- 

 ing ; petioles usually longer than the blades; leaflets 7-11, the blades oblanceolate to 

 elliptic, 1.5-5 cm. long, obtuse or mucronate : raceme 0.5-3 dm. long: calyx 6-8 mm. 

 long : corolla blue or rarely white to pink ; standard with a blade 12-15 mm. broad : pods 

 narrowly oblong, 3-3.5 cm. long, pubescent, beaked. 



In sandy soil, Maine to Minnesota, Florida, Louisiana and Missouri. Spring. 



2. Lupinus subcarnosus Hook. Annual or biennial, somewhat villous. Stems 

 branched at the base, the branches ascending or decumbent, 1-3 dm. long, mostly simple : 

 leaves rather numerous ; petioles mostly longer than the blades, pubescent like the 

 branches ; leaflets 5, the blades cuneate, 2-4 cm. long, truncate, mucronulate : racemes 

 often overtopping the leaves. 4-8 cm. long : pedicels 2-6 mm. long : calyx 5-6 mm. long, 

 densely silky-villous : corolla purplish blue, 1 cm. long or shorter. 



On prairies, Texas. Spring. 



3. Lupinus Tex6iisis Hook. Annual or biennial, silky-strigillose. Stems branched 

 at the base or near it, the branches a>cending or decumbent, 1-3 dm. long, sometimes 

 sparingly branched : leaves rather numerous ; petioles mostly longer than the blades ; 

 leaflets often 5, the blades elliptic to oblanceolate or obovate-oblanceolate, 1.5-4 cm. long, 

 acute or acutish, sometimes merely apiculate or obtuse : racemes 5-15 cm. long, often rather 

 many-flowered : pedicels 4-10 mm. long : calyx 7-8 mm. long, silky strigose : corolla 

 purplish, 1 cm. long or slightly longer ; standard with a pale blotch in the center : pods 

 linear, 3-4 cm. long. 



In prairies or in sand, Texas. Spring. 



4. Lupinus diffusus Nutt. Perennial, densely silky. Stems several or many from the 

 base, 1-6 dm. long, erect or prostrate : leaves 1-foliolate ; blade oblanceolate, oblong or 

 obovate, 4-10 cm. long, mucronate, longer than the petiole or shorter : racemes 0.5-3 dm. 

 long : pedicels about 1-5 mm. long : calyx 8-12 mm. long : corolla blue ; standard with 

 a purple blotch in center : pods oblong, 3-4 cm. long, woolly. 



In dry pine lands, North Carolina to Florida. Spring. 



5. Lupinus villosus Willd. Biennial, densely villous. Stems solitary or several from 

 the base, 3-6 dm. long, ascending or prostrate : leaves 1-foliolate ; blade lanceolate to 

 oblanceolate, 415 cm. long, usually acute and apiculate, longer than the petioles or 

 shorter : racemes 1-4 dm. long : pedicels about 2-5 mm. long : calyx 8-12 mm. long : 

 corolla pale red ; standard with a purple blotch in center : pods oblong, 2-4 cm. long, 

 densely woolly. 



In dry pine lands, South Carolina to Florida. Spring. 



