168 FABACEAE. 



Upper calyx-lobes much united, lanceolate : leaflets 



with linear or linear-oblong blades. 7. L. virginica. 



Plants with complete flowers : corolla whitish or yellowish : 



pod shorter than the calyx or rarely a little longer. 

 Standard-blade suborbicular : peduncles exceeding the 



leaves : calyx about as long as the pod. 8. L. hirta. 



Standard-blade oblong : peduncles shorter than the leaves : 



calyx exceeding the pod. 9. L. capitata. 



1. L. striata (Thunb.) H. & A. Plants erect or diffuse, 1-4 dm. tall: leaflets 

 8-25 mm. long; blades oblong to oblong-obovate : calyx 2-2.5 mm. long; lobes 

 ovate: keel-petals 5-7 mm. long: pods somewhat longer than the calyx. S. 

 Locally common. This plant appeared in a serpentine pasture in 1905. It is 

 now very abundant on the serpentine barrens, and it also grows occasionally 

 on paths and roadsides near the Susquehanna. 



2. L. repens (L.) Bart. Plants procumbent: leaflets 6-15 mm. long; blades 

 oval or obovate: calyx 4-5 mm. long; lower lobes longer than the tube, subu- 

 late, acuminate : keel-petals 6-7 mm. long : pods 3.5-4.5 mm. long. N. S. 

 Common, in dry places and on roadsides. Sandstones and shales, schists. 



3. L. procumbens Michx. Plants procumbent: leaflets 10-25 mm. long; blades 

 oval or elliptic, or sometimes obovate: calyx 4-5.5 mm. long; lobes subulate, 

 about twice as long as the tube: keel-petals 4.5-5.5 mm. long, or sometimes 

 longer : style mostly glabrous : pods 4-5 mm. long. N. S. Common, on dry 

 banks and roadsides. Sandstones and shales, schists. 



4. L, Nuttallii Darl. Plants 5-10 dm. tall, often copiously pubescent: 

 leaflets 8-20 mm. long; blades obovate, oval, or suborbicular: calyx 3.5-4.5 

 mm. long; lobes linear-lanceolate, somewhat longer than the tube: ovary 

 copiously pubescent: pods 6-8 mm. long. M. Occasional, in thickets and 

 woods. Limestones. 



5. L. violacea (L.) Pers. Plants 3-9 dm. tall, diffuse, sparingly pubescent: 

 leaflets 9-20 mm. long; blades elliptic, oblong-elliptic, or oval: calyx 4-4.5 

 mm. long: pods short-beaked, mostly 5-6 mm. long, with short scattered hairs. 

 S. Frequent, on dry banks and about thickets. Schists. 



6. L. Stuvei Nutt. Plants 6-12 dm. tall, velvety or downy: leaflets 9-20 mm. 

 long, or rarely longer; blades oblong, oval r or suborbicular, densely pubescent: 

 calyx 4-5 mm. long; lobes subulate, those of the upper lip united to below the 

 middle: standard 5-6 mm. long; blade suborbicular: pods long-beaked, 4-6 

 mm. long, copiously pubescent. Susquehanna valley. Frequent, on rocky 

 shores and islands. Schists. 



7. L. virginica (L.) Britton. Plants 3-11 dm. tall, appressed-pubescent : 

 leaflets 12-35 mm. long; blades linear to linear-oblong, sometimes finely 

 pubescent beneath: calyx 3-4.5 mm. long: pods elliptic to ovate, 5-6 mm. 

 long, minutely pubescent. S. Not common, on roadsides and banks. 

 Schists. 



8. L. hirta (L.) Ell. Plants 5-12 dm. tall, with spreading hairs: leaflets 12- 

 40 mm. long; blades oval to suborbicular: calyx 6-6.5 mm. long; lobes 3-4 

 times as long as the tube: style glabrous: pods 7-8 mm. long. N. S. 

 Common, in thickets and on banks. Sandstones and shales, schists. 



9. L. capitata Michx. Plants 5-16 dm. tall, silky- or silvery-pubescent: leaf- 

 lets 25-35 mm. long; blades oblong to oval: calyx 10-12 mm. long; lobes 5-6 

 times as long as the tube: standard 7-8 mm. long; blade oblong: style pubes- 

 cent : pods 5-5.5 mm. long. S. Not common, in thickets. Schists. 



15. G-ALACTIA P. Br. Vines with prostrate or twining stems, or erect 

 partially woody plants. Leaflets 3, or rarely 1, 5 or 7. Panicles raceme-like. 

 Calyx 2-lipped, the lobes relatively long. Corolla violet, red, or white : standard 



