102 LEGUMINOS^E. 



3. M. DENTICULATA( Willd.). (Bun CLOVER). Annual, much branched, 

 decumbent, glabrous: leaflets obovate or obcordate, denticulate: fl. 23, 

 yellow: pods coiled into 2 circles, their margins armed with hooked 

 prickles. Common everywhere: valuable as a forage plant, but the 

 "burs" damaging to wool. 



4. M. APICULATA (Willd.). Aspect of M. denticulala, but the pods 

 unarmed, their margin beset on either side by a row of tubercles or 

 murications, the whole surface reticulate. In grain fields, etc.; not 

 common. 



5. M. ARABICA, Camerarius (1588). Medicago Arabica, Allioni (1785); 

 M. maculata, Willd. (1801). Larger every way than M. denticulala; 

 leaflets with a blackish purple irregular blotch in the middle: pods 

 coiled into a spiral of 4 or 5 turns, thus becoming globular, not retic- 

 ulate; the spines in 2 rows, divaricate, curved throughout In moist 

 shaded grounds. 



13. CYTISUS, [Hose. (BROOM). Shrubs with green very leafy or 

 nearly leafless often angular branches, palmately or pinnately 3-foliolate 

 leaves (leaflets entire), and solitary or racemose yellow or white flowers. 

 Calyx with campanulate tube and bilabiate limb. Petals broad; keel 

 obtuse. Stamens monadelphous. Pod compressed, several-seeded. 

 Natives of the Old World; becoming spontaneous on our coast. 



1. C. CANARIENSIS (L.), Greene. Much branched, 3 6 ft. high, soft- 

 pubescent, the branches and branchlets very leafy: leaflets % % in. 

 long: fl. yellow, in numerous terminal short racemes, fragrant; calyx 

 with upper segment deeply, lower obsoletely 3-toothed at apex; banner 

 not reflexed; keel deflexed, releasing the stamens. Running wild on 

 the grounds of the University at Berkeley. 



2. C. SCOPARIUS (L.), Link. Size of the last, but sparingly leafy, the 

 branches prominently angular: leaflets glabrous, often 1 only: fl. large, 

 bright yellow, solitary or in pairs along the branchlets, in the leaf-axils, 

 and apparently racemose: pod pilose along the margins. Naturalized 

 abundantly northward; more sparingly with us. 



3. C. PROLIFERUS, L. f. Arborescent, branches terete and, with the 

 young leaves, etc., silky-pubescent; leaflets 3, elliptic-lanceolate, 1 in. 

 long or more: fl. white in lateral umbellate racemes: banner reflexed: 

 keel shorter than the wings, enclosing the stamens : pod villous. Native 

 of Teneriffe; a valued forage shrub in some countries; escaped from 

 cultivation at Berkeley. Jan., Feb. 



14. ULEX, Linn. (FURZE, GOKSE). Compact very thorny shrubs 

 with simple prickle-pointed leaf -like organs, and scattered yellow flowers. 

 Calyx of 2 nearly or quite distinct yellowish sepals. Banner nearly as 



