BIADELPHIA. DECAN^DRIA. 2 05 



uporv a very long peduncle; bractes broad and acuminate, 

 decidiiuus; darina vtry sljort; legume g-'ibl^ous, and trans- 

 versely rugose. Hab In Carolina and Tlor.da, also con\- 

 mnn in tlie open forests of Ohio, Kentucky and Tennessee. 

 Perennial. Stem about 12 to 18 inches higli, grooved 

 and minutely strigose. Stipules cauline, linear, acumi- 

 nate; leaves tevnate, without ghuids, a little pubescent, 

 central leaflet conspicuously, petiolate. Spikes or racemes 

 in fruit 3 or 4 inches long> common peduncle 4 to 6 

 inches. F'lovvcrs pale violet, pedicellate, erect. Calix 

 pubescent, almost equally S-cleft and strongly veined, 

 "Without glands. Wings (or lateral petals) more than twice 

 the length of the carina. Legume 1-seeded, naked and 

 transverse, the length of the calix; persistent style resu- 

 pinate. The entire absence of glands, the minuteness of 

 the carina, and the fruit, decide this plant to be a JMelilotus^ 

 to which genus it was long ago referred by Clayton; it i» 

 at the same time the connecting link to Psoralea. 



An European genus, with a few species indigenous to 

 Barbary and tiie Levant. 



504. TRIFOLIUM. L. (Trefoil.) 



Flowers subcapitate. — Legume vahTless, co- 

 vered by the caiix, 2 to 4-seedeil. 



Herbaceous; leaves tern ate, rarely digitate; stipules ad* 

 nate to the base of the petiole, flovver in T. praicnse mc 

 nopetalous. 



Species. \.T. refexmn. 2. re/>e7z5. Cultivated and natu- 

 ralized. 3. ctiioli?uanum. 4. microcephahim. Ph. In Cali- 

 fornia. 5. pratense. Cultivated and naturalized. 6. pennsyl- 

 vaniciim. 7. urvenfie. Native. 8. cnfrun'wn. 9. procum". 

 bens. These 2 last are natiiraliz.ed. 10. involucratiim. 



13. * megacephalnm. LnpmasCer macrocephalus. .Ph. 2: 

 p. 479. t. 23. Leaflets by 7's, cuneate-lanceolate, petiole 

 very long, stipules cuneate, incisely 3-toothed; segments ot* 

 the calix setaceous, plumose; legume 3 to 4-seeded. Hab. 

 Near the sources uftlie Missouri. Neither this species nor 

 T. Lupinastev appear to possess any single generic cha- 

 racter distinct from Trifolivm. There can surely be no 

 generic character in leaves; but even here analogy is not 

 altogether wanting, as many genuine species of Trifolium 

 oGCasionally produce more than 3 leaflets. 



A genus of near 80 spocies^. principally indigenous to 

 Fiurnpe. 



