38 PAPILIONACEAE. 



twice as long 1 , violet purple; flowers 6-10, in a spike-like raceme; port thick, 

 succulent, obovoid, corky when dry. Prairies; May; frequent; Fayette, 

 Polk, Calhoun, Cerro Gordo, Story, Shelby, Emmet, Lyon, Woodbury, Potta- 

 wattomie, and Decatur counties. (A. crasslcarpas Xutt.) 



A. plattensis Nutt. Prostrate or ascending, villous; leaflets oblong or 

 obovate; flowers yellowish-white, with purple tinge; pod ovoid, pubescent, 

 not wrinkled. Reported from Harrison county. (Arthur.) 



A. canadensis L. Stem 2-4 feet high, smooth or somewhat pubescent; 

 leaflets 21-31, oblong-ovate or elliptical; flowers thickly set in an elongated 

 spike, greenish yellow; pod oblong, glabrate, terete. Hank of streams; July- 

 August; frequent throughout. (A. enroll ninnits L.) 



* * Pod 1-cclled, sometimes partially 2-celIed by intrusion of the sutures. 



A. distortus T. & G. Low, diffuse or ascending, sub-glabrous; leaflets 11- 

 25, obovate or oval, apex rounded or emarginate; f owers purple, in a short 

 loose spike; pod sessile, glabrous, curved, grooved on the lower side. Musca- 

 tine county; reported from Scott county. 



A. lotiflorus Hook. Nearly stemless, branched from the base, villous- 

 pubescent with whitish hairs; leaflets 7—15, oval or oblong; flowers yellow, in 

 dense short spikes; pod sessile, ovoid-oblong, pubescent. Lyon and Fremont 

 counties. Fremont county specimens are low, 1-3-flowered; pods near the 

 ground. Loess hills, frequent. These have been referred to ^1. lutlflwus 

 brachypus Gray. 



A. coopcri Gray. Stem 1-2 feet high, glabrous; leaflets 9-21, oblong or 

 elliptic, apex obtuse or emarginate; flowers short-pedicelled; pod sessile. 

 Reported from Lee county. (Arthur.) (Phaca neglecta T. & (J.) 



OXYTROPIS DC. Mostly stemless herbs, with odd-pinnate leaves, and 

 racemose or spicate flowers on scape-like peduncles. Calyx-teeth nearly 

 equal. Petals clawed; keel pointed or appendaged. Stamens diadelphous. 

 Pod 2-valved, 1-celled or partially 2-celled. 



O. lamberti Pursh. Stemless Loco-Weed. Silky-pubescent; stipules mem- 

 branous, pubescent, lanceolate, imbricated; leaflets 9-19, linear or oblong; 

 flowers purple or yellowish; ped coriaceous, ovoid-cylindric. pubescent, lono-- 

 acuminate. Prairies; May-August; Lyon, Woodbury, and Fremont counties; 

 found usually on the loess hills. (Spesla lamberti (Pursh) Kuntze.) 



GLYCYRF^H'ZA L. Perennials; root large, sweet, descending. Leaves 

 odd-pinnate; stipules small. Flowers in dense axillary spikes; anthers alter- 

 nately smaller. 



G. lepidota Nutt. Wild Liquorice. Stem 1-3 feet high, appressed pubes- 

 cent; leaflets 15-10, ovate-oblong or lanceolate, scaly when young, dotted 

 when old, mucronate; flowers whitish; pods oblong, covered with hooked 

 prickles, few seeded. Fields and waste places; May- August; common in the 

 west counties, spreading eastward. 



DESMODIUM Desv. Perennial herbs, with stipellate 3-foliate leaves, 

 scale-like stipules and bracts, and usually small flowers in axillary or termi- 

 nal racemes or bracts. Calyx more or less 2-lipped, the upper with 2 and the 

 lower with 3 teeth. Standard oblong, ovate or orbicular; wings obliquely 

 oblong, adherent by a transverse appendage; keel straight or straightish, 

 obtuse or truncate. Stamens monodelphous or diadelphous, 9 and 1. Ovary 

 sessile or stalked; ovules 2-many. Pod sessile or stalked, Hat. several 

 jointed; joints readily separable, indehiscent or nearly so, mainly coriaceous, 

 pubescent or muricate. (Meibomia Adans.) 



