508 LEGUMINOSAE (PULSE FAMILY) 



green branches, leaves mostly digitately 3-foliolate, and large bright yellow 

 flowers. (The ancient Roman name of a plant, probably a 3Iedicngo.) 



1. C. scopXrius (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. triEX L. Furze. Gorse 



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

 equal length. Stamens monadelphous. 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. Lupine 



Calyx very deeply 2-lipped. Sides of the standard reflexed ; keel scythe- 

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

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

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

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

 flowers in terminal racemes or spikes. (Name from lujms, a wolf, 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, sho\^^, 

 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. TRIF6LIUM [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-G-seeded, indehiscent, or opening by one of the 

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

 nately) 8-foliolate ; leaflets usually toothed. Stipules united with the x^etiole. 

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



a. Flowers ses.sile in dense heads. 



Calyx-teeth silky-plumose, surpassing the corolla . . '. . \. T. arvenae. 

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



Ileads cylindrical ; corolla scarlet to deep red 2. 7*. incarnatum. 



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



Calyx soft-hairy 3. T. pratenae. 



Calyx nearly glabrous 4. T. medium. 



a. Flowers pedicellate, io looser heads ; pedicels reflexed in ag% b. 

 b. Corolla white, roseate, or purple c. 

 c. Calyx-teet'ii bristle-tipj»ed. 

 Calyx villous or hispid. 



Leaflets narrowly oblong 5. 71 virginieum 



Leaflets obovate 6. T. reflexum. 



Calyx essentially glabrous. 

 Stoloniferous. 



Flowers 1-1.8 cm. long; corolla red ; peduncles rarely more 



than twice the length of the head 1. T. atolonifirum. 



