CL. XVII.] DIADELPHIA DECANDRIA. 297 



longer than the calyx. Seeds from one to four, roundish, smooth. 

 Name from tria, three, and folia, leaves. 362. 



* Flowers in clusters er spikes. 



1. T. officindle. Common Melilot. Clusters with the flowers pointing 

 one way ; legume protruding, acute, transversely wrinkled, hairy, two- 

 seeded ; stem erect; stipules awl-shaped. Stem two or three feet 



high, erect, branched, angular: leaflets serrate: flowers yellow, in axillar, 

 long-stalked clusters. In drying it emits a strong smell, resembling that 

 of new hay. Cultivated as food for cattle. Annual: flowers in June 

 and July : grows in thickets, hedges, and borders of fields. Eng. Bot. 

 vol. xix. pi. 1240. Eng. Fl. vol. iii. p. 297. A variety with white flowers 

 has been described as a distinct species. Eng. Bot. Suppl. pi. 2689. 

 Brit. FL 4th ed. p. 274. 1068. 



** Flowers in heads; legumes many-seeded. 



2. T. ornithnpodioides. Bird's-foot Trefoil. Flowers about three in 

 each head ; legume protruding, eight-seeded, twice as long as the calvx ; 

 stems decumbent. Stem from three to five inches long : flowers rose- 

 coloured. Annual : flowers in June and July : grows in dry, sandy, 

 or gravelly pastures : not common. Eng. Bot. vol. xv. pi. 1047. Eng. 

 Fl. vol. iii. p. 298. 1069. 



3. T. repens. White Trefoil. Dutch Clover. Heads of flowers 

 stalked, spherical, the flowers on short stalks ; legume four-seeded, in- 

 cluded within the calyx ; stems creeping ; leaflets inversely heart-shaped. 

 Stems from six to twelve inches long : flowers white, fragrant ; leaf- 

 lets generally brown on the back. A valuable pasture plant, supposed 

 erroneously to indicate a rich soil. Perennial: flowers from May to 

 September : grows in meadows and pastures, abundantly. Eng. Bot. 

 vol. xxv. pi. 1769. Eng. Fl. vol. iii. p. 292. 1070. 



4. T. sufocdtum. Suffocated Trefoil. Heads of flowers sessile, lateral, 

 roundish ; legume two-seeded, concealed within the calyx ; teeth of the 



calyx lance-shaped, acute, recurved, longer than the corolla. The 



whole plant generally buried in sand : flowers pale rose-colour. Annual : 

 flowers in June and July : grows on the sandy sea-coast at Yarmouth, 

 and other places in England. Eng. Bot. vol. xv. pi. 1049. Eng. FL 

 vol. iii. p. 300. 1071. 



*** Flowers in heads; legumes one-seeded, calyx generally hairy. ' J 



5. T. siibterrdneum. Subterraneous Trefoil. Heads of about four 

 flowers, hairy; a central, reflected, stiflT, starry tuft of fibres from the 



top of the stalk embracing the fruit. Stems pressed close to the ground, 



from three to six inches long, hairy: flowers white, at first erect, aftei- 

 wards bent to the ground, the stalk sending out from its extremities seve- 

 ral fibres. Annual : flowers in May : grows in dry gravelly pastures in 

 England; frequent. Eng. Bot. vol. xv. pi. 1048. Eng. Fl. vol. iii. 

 p. 300. 1072. 



6. T. ochroleucum. Sulphur-coloured Trefoil. Flowers in a solitary 

 terminal head ; stem erect, downy : lower leaflets inversely heart-shaped ; 



lowest tooth of the calyx thrice as long as the rest. Stems from twelve 



to eighteen inches high : flowers pale-yellow. Perennial: flowers in June 

 and July : grows in dry pastures, in England : frequent. Eng. Bot. 

 vol. xvii.'pl. 1224. Eng. FL vol. iii. p. 301. 1073. 



2 C 



