422 



FABACEAE. 



Vol. II. 



3. Dolicholus erectus (Walt.) Vail. 

 Erect Rhynchosia. Fig. 2644. 



TrifoHum erectum Walt. Fl. Car. 184. 1788. 



Rhynchosia erecta DC. Prodr. 2: 384. 1825. 



Rhynchosia tomentosa var. erecta T. & G. Fl. N. A. 

 i: 285. 1838. 



D, erectus Vail, Bull. Torr. Club 26: 115. 1899. 



Erect, rather stout, simple or slightly branch- 

 ed, velvety-pubescent or tomentose, i°-2i° 

 high. Stipules linear-lanceolate, acuminate, 

 2"-3" long; petioles shorter than or equalling 

 the leaves; leaflets 3, oval, ovate or slightly 

 obovate, thick, densely tomentose, especially 

 beneath, obtuse or acute, 1-2' long; racemes 

 5_i5_flowered, sessile or short-peduncled; flow- 

 ers 3"-5" long; pod oblong, pubescent, 6"-8" 

 long, about 3" wide. 



In dry soil, Delaware to Florida, Tennessee and 

 Louisiana. May-Sept. 



4. Dolicholus simplicifolius (Walt.) Vail. 

 Round-leaved Rhynchosia. Fig. 2645. 



TrifoHum simplicifoliuin Walt. Fl. Car. 184. 1788. 



Rhynchosia reniformis DC. Prodr. 2: 384. 1825. 



Rhynchosia tomentosa var. monophylla T. & G. Fl. N. A. 

 I : 284. 1838. 



Rhynchosia simplicifolia Wood, Bot. & Fl. 96. 1870. 



D. simplicifolius Vail, Bull. Torr. Club 26; 114. 1899. 



Erect, low, simple, pubescent with spreading hairs, 

 2'-g' high. Stipules lanceolate, acuminate, 3"-4" long ; 

 petioles shorter than or exceeding the leaves ; leaflet 

 usually solitary, orbicular or broader, thick, obtuse 

 and rounded or apiculate at the apex, slightly cordate 

 at the base, i'-2' long (leaflets rarely 3, the lateral 

 ones ovate) ; racemes rather densely flowered, short- 

 peduncled or sessile; flowers 3"-s" long; pod as in 

 the preceding species. 



In dry soil, Virginia to Florida, Tennessee and Louisi- 

 ana. May-July. 



48. PHASEOLUS [Tourn.] L. Sp. PI. 723. 1753. 



Annual or perennial vines, rarely erect herbs, with pinnately 3-foliolate stipellate leaves, 

 and axillary racemose flowers. Calyx S-toothed or 5-lobed, or the 2 upper teeth more or less 

 united. Standard orbicular, recurved, spreading or somewhat contorted ; wings mainly obo- 

 vate, equalling or exceeding the standard ; keel spirally coiled, linear or obovoid. Stamens 

 diadelphous (9 and i) ; anthers all alike. Style longitudinally bearded; stigma oblique or 

 lateral; ovary sessile or nearly so; ovules 00, Pod linear, straight or curved, 2-valved, several- 

 seeded, tipped with the persistent style. Seeds mostly with rounded ends. Rachis thickened 

 at the bases of the pedicels. [Ancient name of the Kidney Bean.] 



About 170 species, natives of warm and temperate regions. Besides the following, about 12 

 others occur in the southern and southwestern states. Type species : Phaseolus vulgaris L, 



