CYTI6UB. LEGUMINOS.T!;. 131 



MKDICABO. 



On sandy plains about the mouth of the Columbia river. Introduced 

 from Europe. 



4 CYTISUS E. GeiH n. 877. 



Shrubs wi^h green, more or less leafy angular branches, palm- 

 ately or pinnately trifoliolate leaves, minute or inconspicuous 

 slipulesand solitary or racemous, yellow or white flowers. Calyx 

 with campanulate tube and bilabiate limb. Petals broad, ungui- 

 Culate, free, tjie keel obtuse. Stamens 10, monadelphous ; anth- 

 ers in two sets, the outer ones short and versatile, the alternate 

 ones long and basifixed. Ovary mostly sessile, many-ovuled ; 

 style glabrous, incurved; stigma terminal, capitate or obli<{ue. 

 Pod compressed, several-seeded. 



C. sooPARiTjs Link. Enum. ii, 241. (Scotch Bkoom). A much branched 

 shrub .3-8 feet high with prominently angular green branches ; sparingly 

 leafy, leaflets glaprous, often 1 only : flowers large, hright'yellow,, solitary 

 or in pairs along the branchlets, in the leaf-axils and apparently racemose : 

 pods- pilcisealong the margins. ■ Becoming common' in many places. In- 

 troduced from Europe. ' 



Tnbe 3. Trifolieae Bronn. DC. Prodr. ii, 171. Erect or pro- 

 cumbent, mostly low herbs, rarely a ■}ittle shrubby, with palmately 

 or pinnately trifoliolate, rarely 5-7-fdliolate leaves, the leaflets often 

 toothed or serr^ilate, and axillary or terminal, racemose, spicate, 

 capitate or umbellate in fluorescence. Corolla papilionaceous. Sta- 

 mens diadelphous. Pod continuous, 1-celled. several-seeded and. de- 

 hiscent, or one to few-seeded and nearly indehiscent. Radicle iii- 

 ftexed. 



5 MEDICAGO Tourn. L. Gen. n. 899. 



Herbaceous, or rarely shrubby, plants with palmately trifolio- 

 late leave=, oftep incised stipules, and axillary, 1-2- or many- 

 flowered, peduncles. Calyx somewhat cylindrical, 5-cleft. Keel 

 of the corolla remote from the upper petal. Pod usually many- 

 seeded, of various forms, falcate or spirally coiled. 



M. SATiVA Morif. Hist, ii, 150. (Alfalfa). Perennial; glabrous: stems 

 0rect, 2-i feet high : leaflets euneate-oblong or oblanceolate, toothed above, 

 mucronate; stipules lanceolate, somewhat toothed: flowers numerous, 

 racemose, violet : pods spirally coiled, unarmed. Fields and roadsides, 

 sparingly introduced. 



M. LUPDLiNA L. Sp. 779. ■ Annual, slender, procumbent, 1-2 feet long, 

 apft-hairy: leaflets obovate, small: flowers minute, in small, oblong heads; 

 yellow: pod small, reniform or curved almost into a ring, black when ripe, 

 l-'seeded. Klicki^t Co., "Washington. Introduced from Asia. 



M. DENTicoLATiV Willd. Sp. iii, 1414. (Bcr-Cloveb). Annual, much 

 branched, decumbent, glabrous : leaflets obovate or obcordate, denticulate: 

 flowers 2-3, yellowy : pods coiled into 2 circles, their margins armed with 

 hooked pirickles. Introdnced from Asia. 



6 MELIL0TU8 Tourn. Inst. t. 226 L. Gen. n. 899 (Sweet Clover). 

 Erect herbs with pinn£itely trifoliolate leavias and small fra- 



