LEGUMINOS.«. (rULSK FAMILY.) 1;)7 



16. A. flexubSUS, Dougl. Ashy-imhcruh-nt, {wcendin^ (1-2° hx^rh) . 

 leaflets 11-21, iiidstlv narrow; flowers small, in h.use racenms ; jmmI tliin-eori- 

 aceous, cijlindrit (8-11" long, 2" i)roa<l), pointed, straight or eurved, pubcr- 

 ulent, very shortly stipitate. — Ked Kiver Valley, Minu., to Col. 



22. OXYTROPIS, DC. 



Keel tipped with a sharj) jirojeeting ])oint or a])pendage; (jtherwise a.s in 

 Astragalus. Pod often more or les.s 2.celled by the intrusion of tiie ventral 

 suture. — Our species are low, nearly ac-aulescent perennials, witli tufts of 

 numerous very short stems from a hard and thiek root or rootstock, covered 

 with scaly adnate stipules ; i)innate leaves of many leaflets ; j)eduncled scajie- 

 like, bearing a head or short spike of flowers. (Name from o^vs, s/turj>, and 

 rpSiTis, keel.) 



* Leaves shnpli/ /)iiuiate. 



1. O. Campestris, DC, var. cserulea, Koch. Pubescent or srnootlu'sh } 

 leaflets lanceolate or oblong; flowers violet or blue, sometimes pure white; 

 pods ovate or oblong-lanceolate, of a thin or papery texture. — N. Maine to 

 Labrador. 



2. O. Lamberti, Pursh. Silkij withfne appre.ssed hairs ; leaflets mostly 

 linear; flowers larger, purple, violet, or sometimes white; pods carti/a(jinous 

 or Jirm-corlaceons in texture, silky-pubescent, strictly erect, cylindraceous-lan- 

 ceolate and long-pointed, almost 2-celled by intrusion of the ventral suture. — 

 Dry plains, Sask. and Minn, to Mo. and Tex., west to the mountains. 



* * Leaflets numerous, mostli/ in fascicles of 3 or 4 or more along the rhachis. 



3. O. spl^ndens, Dougl Silvery silky-villous (6-12' high) ; scape spi- 

 cately several to many-flowered ; floAvers erect-spreading ; pod ovate, erect. 2- 

 celled, hardly surpassing the very villous calyx — Plains of ISask. and W. Minn., 

 to N. Mex. and the Rocky Mts. 



23. GLYCYRRHIZA, Tourn. Liquorice. 



Calyx with the two upper lobes shorter or partly united. Anther-cells con- 

 fluent at the apex, the alternate ones smaller. Pod ovate or oblong-linear, 

 compressed, often curved, clothed with rough glands or short prickles, scarcely 

 dehiscent, few-seeded. The flower, etc.. otherwise as in Astragalus — Long 

 perennial root sweet (whence the name, from yXvKvs, su-eet, and ^i(a, root) ; 

 herbage glandular-viscid; leaves odd-pinnate, witii minute stipules*, flowers iu 

 axillary spikes, white or bluish. 



1. G. lepidbta, Nutt. (Wild Lu^i okk i:.) Tall (2-3^ high) ; leaflets 

 15-19, oblong-lanceolate, mucronate-])ointed, sprinkled with little scales when 

 young, and with corresponding dots when old ; s])ikes pedunded, short ; flowers 

 whitish; ]>od3 oblong, beset witli hocjked prickles, so as to resemble the fruit 

 of Xantliium on a smaller scale. — Minn, to Iowa and Mo., and westwanl ; Ft. 

 Erie, Out. 



24. ^SCHYNOMENE, L. Sexsitive Joixt-Vetch. 



Calyx 2-li])ped; the upper lip 2-, tiie lower 3-cleft. Standard nmndish ; 

 keel boat-shaped. Stamens diadelphous in two sets of 5 each. PihI flattened. 



