LEGUMINOSAE (PULSB FAMILY) 525 



slender peduncles; the pod round-ovate, acutish, 3-4 mm. long, hardly shorter 

 than the calyx. — Sandy barrens, e. Mass. to Fla. and La. 



14. L. leptostachya Engelm. Clothed with appressed silky pubescence , 

 stems often branched, slender ; leaflets linear to narrowly oblong ; spikes sleri- 

 der, somewhat loosely flowered, on peduncles as long as the leaves ; pod ovate, 

 small (3 mm. long), about equaling the calyx, densely pubescent. — 111., Wise, 

 Minn., and la. 



16. L. striXta (Thunb.) H. & A. Diffusely branched decumbent sub- 

 pubescent annual; petioles very short; leaflets oblong-obovate, 1.2 cm. long or 

 less ; peduncles very short, 1-5-flowered ; pod small, little exceeding the calyx. — 

 Roadsides and open soil, D. C. to Mo., and southw. (Nat. from e. Asia.) 



40. STYLOSANTHES Sw. 



Calyx early deciduous ; tube slender and stalk-like ; limb unequally 4-5-cleft, 

 the lower lobe more distinct. Corolla and nionadelphous stamens inserted at 

 the summit of the calyx-tube ; standard orbicular ; keel incurved. Anthers 10, 

 in two series. Style filiform, its upper part deciduous, the lower incurved or 

 hooked, persistent on the 1-2-jointed short reticulated pod ; the lower joint when 

 present empty and stalk-like. — Low perennials, branched from the base, with 

 wiry stems, pinnately 3-foliolate leaves, and small yellow flowers in terminal 

 heads or short spikes. (Name composed of o-rOXos, a column, aud dvdos, a flower, 

 from the stalk-like calyx-tube. ) 



1. S. biflbra (L.) BSP. Erect or spreading, pubescent and tawny-setose about 

 the few-flowered heads; leaflets narrowly lanceolate, mostly acute at both ends; 

 uppermost floral bracts entire; style not quite apical on the fruit. (S. elatior 

 Sw.) — Pine barrens and dry soil, near the coast, L. I. and N. J. to Fla. and 

 Tex. ; north w. in Miss, basin to Kan., Mo., 111., and Ind. June-Aug. 



Var. hispidissima (Michx.) Pollard & Ball. Stems covered with tawny 

 6etose pubescence. (S. elatior, var. T. & G.) — Va., Okla., and southw. 



2. S. riparia Kearney. More slender and decumbent, scarcely setose ; stems 

 tomentulose in lines ; leaflets oval or elliptical, obtuse, mucrotmlate ; uppermost 

 bracts cleft; terminal joint of the loment symmetrical. — Del. to Ala. July, 

 Aug. 



41. z6RNIA Gmel. 



Calyx bilabiate, 5-toothed, the tube not elongated. Corolla yellow. Stamens 

 monadelphous. Ovary sessile. — Prostrate wiry-stemmed perennials with long 

 tough root. (Named presumably for Johann Zorn, a German apothecary of the 

 I8th century.) 



1. Z. bracteata (Walt.) Gmel. Leaves 4-foliolate. — Sandy fields, s. e. Va. 

 {Heller), and southw. (Mex.) 



42. viCIA [Tourn.] L. Vetch. Tare 



Calyx 5-cleft or 5-toothed, the 2 upper teeth often shorter, or the lowest 

 longer. Wings of the corolla adhering to the middle of the keel. Stamens more 

 or less diadelphous (9 and 1) ; the orifice of the tube oblique. Style filiform, 

 hairy all round or only on the back at the apex. Pod flat, 2-valved, 2-several- 

 seeded. Seeds globular. Cotyledons very thick, remaining under ground in 

 germination. — Herbs, mostly climbing more or less by the tendril at the end of 

 the pinnate leaves. Stipules half-sagittate. Flowers or peduncles axillary. 

 (The classical Latin name. ) 



Peduncle very short or wanting^; flowers few, 1-3 cm. long. 

 Annuals ; calyx-teeth nearly equaling the tube. 



Flower 2-8 cm. long 1- U ^^^^^'"\.^ ,. 



Flower 1-1.8 cm. long 2. V. angiutUfoli^ 



Perennial ; calyx-teeth much shorter than the tub« . . •. < .8. V. s»p*um. 



