Lespedeza Leguminosae 611 



Calyx mostly 6-9 mm long; flowers yellowish white. 



Leaflets orbicular to oblong-ovate; spikes thick-cylindric, 1-1.5 cm thick 



5. L. hirta. 



Leaflets linear to narrowly oblong; spikes slender-cylindric, 5-8 mm thick, 



somewhat loosely flowered. (See excluded species no. 403, p. 1068.) 



L. leptostachya. 



Calyx lobes of petaliferous flowers less than 4.5 mm long, those of the cleistogamous 

 flowers 0.5-2 mm long; flowers purplish, corollas generally 6-7 mm long; pods of 

 petaliferous flowers oval, mostly 5-7 mm long, of cleistogamous flowers sub- 

 orbicular to broadly oval, mostly 4-5 mm long (sometimes 9 in L. violacea and 

 L. repens) ; pubescence of stem and petioles appressed or spreading. 

 Pubescence of stem and petioles appressed. 



Peduncles of flower clusters shorter than the petioles of their subtending leaves. 

 Leaflets linear to linear-oblong, appressed-pubescent above; plant virgate or 



more rarely virgate-branched 6. L. virginica. 



Leaflets oval to elliptic-oblong, rarely suborbicular or slightly obovate, glabrous 

 above or sometimes a few leaves with scattered hairs above; plant erect 



or spreading 7. L. intermedia. 



Peduncles of flower clusters mostly longer than the petioles of their subtending 



leaves. 



Plants trailing; stems usually 4-10 dm long; leaflets oval or oblong, those of 



the stem leaves mostly 6-14 mm wide and 10-28 mm long, usually evenly 



pubescent above with appressed hairs 0.2-0.4 mm long, sometimes nearly 



glabrate above; banner of flowers usually as long as or longer than the 



keel 8. L. repens. 



Plants erect or somewhat spreading; stems generally 4-6 dm long, rarely up 

 to 8 dm long; leaflets usually large, about as long as the petioles of the 

 leaf, broadly oval to oblong, mostly 15-30 mm long, rarely up to 40 mm 

 long, glabrous above, or sometimes glabrate, the hairs appressed and 

 about 0.5 mm or more long; banner of flowers shorter than the keel. 



9. L. violacea. 



Pubescence of stem and usually of petioles spreading. 

 Peduncles of flower clusters shorter than the leaves. 

 Leaflets linear to linear-oblong. 



Upper surface of leaflets glabrous or strigillose with short hairs, lower 

 surface merely appressed-pubescent; petioles of principal cauline leaves 

 averaging 2.2 cm in length; calyx and pod commonly strigose to stri- 

 gillose 6a. L. virginica f . Deamii. 



Upper surface of leaflets tomentose-strigose with long hairs, lower surface 

 more densely so than the upper; petioles of principal cauline leaves 

 averaging 1.7 cm in length; calyx and pod commonly villous-canescent. 



10a. L. Stuevei f. angustifolia. 



Leaflets oval to elliptic-oblong, rarely suborbicular. 



Upper surface of leaflets glabrous or sparingly strigillose, lower surface 

 strigose; petioles of principal cauline leaves nearly equaling the length 

 of the leaflets, rarely exceeding them; peduncles of petaliferous flowers 

 averaging 11 mm in length; calyx and pod commonly strigose or 



strigillose 7a. L. intermedia f . Hahnii. 



Upper surface of leaflets tomentose-strigose, lower surface more densely so 

 than the upper; petioles of principal cauline leaves shorter than the 

 leaves; peduncles of petaliferous flowers short, averaging 6 mm in 



length; calyx and pod commonly villous-canescent 10. L. Stuevei. 



Peduncles of flower clusters longer than the subtending leaves. 



Plants erect; leaflets broadly oval, the largest leaflets generally 20-40 mm 

 long; number of petaliferous flowers in a cluster generally 10-25; longest 

 calyx lobes of petaliferous flowers or fruit usually more than 3 mm. 

 long 4. L. Nuttallii. 



