508 LEGUMINOSAE (PULSE FAMILY) 



green branches,, leaves mostly digitately 8-foliolate, and large bright yellow 

 flowers. (The ancient Roman name of a plant, probably a Medicago.) 



1. C. scofArius (L.) Link. (Scotch B.) Glabrous or nearly so, about 1 

 m. high; leaflets small, obovate, often reduced to a single one ; flowers solitary 

 or in pairs, on slender pedicels, in the axils of the old leaves, forming leafy 

 racemes along the upper branches ; style very long and spirally incurved. 

 {Sarothamnus Wimmer.) — Sandy barrens, etc., N. S. ; s. e. Mass. to Va., and 

 southw. May, June, (Nat. from Eu.) 



16. tLEX L. Furze. Gorse 



Calyx deeply 2-lipped. Standard ovate ; wings and keel oblong, of about 

 equal length. Stamens monadelplious. Pod short-oblong. — Low densely 

 branched shrubs with spine-like phyllodial leaves. (An ancient name, used 

 by Pliny for some not certainly identified plant.) 



1. U. EUROPAEUS L. Calyx large, yellow, tomentulose. — Sometimes culti- 

 vated as a sand-binder and now somewhat extensively established locally near 

 the coast from Nantucket to Va. (Introd. from Eu.) 



17. LUPINUS [Tourn.] L. LrpmE 



Calyx very deeply 2-lipped. Sides of the standard reflexed ; Trpel srvthe- 

 shaped, pointed. Sheath of the monadelphous stamens entire; auiiiers 

 alternately oblong and roundish. Pod oblong, flattened, often knotty by con- 

 strictions between the seeds. Cotyledons thick and fleshy. — Herbs, with 

 palmately 1-15-foliolate leaves, stipules aduate to base of the petiole, and showy 

 flowers in terminal racemes or spikes. (Name from hqms, a ^Yolf, because 

 these plants were thought to devour the fertility of the soil.) 



L L. per§nnis L. (Wild L.) Perennial, somewhat hairy; stem erect, 

 3-6 dm. high; leaflets 7-11, oblanceolate ; flowers in a long raceme, showy, 

 purplish-blue (rarely pale); pods broad, very hairy, 5-6-seeded. —Sandy soil, 

 s. w. Me. to Minn., and s. to the Gulf. May, June. Var. occidentalis Wats, 

 has stems and petioles more villous. — Mich., n. Ind. (C P. Smith) ^ and Wise. 



18. TRIFdLIUM [Tourn.] L. Clover. Trefoil 



Calyx persistent, 5-cleft, the teeth usually bristle-form. Corolla mostly 

 withering or persistent ; the claws of all the petals, or of all except the oblong 

 or ovate standard, more or less united below with the stamen-tube ; keel short 

 and obtuse. Tenth stamen more or less separate. Pods small and membranous, 

 often included in the calyx, 1-6-seeded, indehiscent, or opening by one of the 

 sutures. — Tufted or diffuse herbs. Leaves mostly palmately (sometimes pin- 

 nately; 3-foliolate ; leaflets usually toothed. Stipules united with the petiole. 

 Flowers in heads or spikes. (Name from tres^ three, and folium, a leaf.) 



a. Flowers sessile in dense heads. 



Calyx-teeth silky-plumose, surpassing the corolla . . . . \. T. arxense- 

 Calyx-teeth ciliate, villous, or glabrous, surpassed bv the corolla. 

 Heads cylindrical ; corolla scarlet to deep red . ' . . . , 2. T. incarnalum. 

 Heads globose or ovoid ; corolla magenta or purple (rarely white) 



Calyx soft-hairy 8. T. pratense. 



Calyx nearly glabrous 4. T. medium. 



a. blowers pedicellate, in looser heads; pedicels reflexed in age 6. 

 6. Corolla white, roseate, or purple c. 

 c. Calyx-teeth bristle-tii>iK'd. 

 Calyx villous or hispid. 

 Leaflets narrowly oblong ........ .5. r. rirginicum 



Leaflets obovate ^ ^ . _. -" 



Calyx essentially glabrous. 

 Stoloniferous. 



7'. refieacum,. 



Flowers 1-1.3 cm. long ; corolla red ; peduncles rarelv more 



than twice the length of the head . , . ". .7. T. stolon if erum. 



