102 leguminos^i. 



3. M. dentiouijATA (Willd.). (Bub Gloves). Annual, much branched, 

 decumbent, glabrous: leaflets obovate or obcordate, denticulate: fl. 2 — 3, 

 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. dtnticulata, 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. Akabica, Oamerarius (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. CTTISUS, IHosc. (Bboom). Shrubs with green very leafy or 

 nearly leafless often aDgular 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. Canabiensis (L.), Greene. Much branched, 3 — 6 ft. high, soft- 

 pubescent, the branches and branchlets very leafy: leaflets J^ — J£ 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. — Bunning wild on 

 the grounds of the University at Berkeley. 



2. C. scopabius (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. prolifebus, 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. (Ptjbze, Goese). 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 



