38 PAPILIOXACEAM 



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

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

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

 wattoinie. and Decatur counties. (A. crosstcarpus Xutt.) 



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

 obovate: Howers 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. Bank of streams; July— 

 August: frequent throughout. (A. carollnianus L.) 



* * Pod l -celled, sometimes partially 2-celled 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 A. lotifiorvs 

 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.) (Fhaoa neglecta T. & G.) 



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, long- 

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

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



GLYCYRF^HIZA 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 15-19, 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, 

 BCale-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, flat, several 

 jointed; joints readily Reparable, indehiscent or nearly so, mainly coriaceous. 

 pubescent <>r muricate. (Mbibomia Adaus.) 



