298 DIADELPHIA DECANDRIA. [CL. XTII. 



7. T, pratense. Common Purple Clover, Heads dense, egg- 

 shaped ; stems ascending ; petals unequal ; lower calyx-tooth 

 longer than the rest, which are equal ; stipules egg-shaped, bristle- 

 pointed. Stems about a foot high : leaflets elliptical, entire, 



nearly smooth : flowers purple, sweet-scented. A valuable pas- 

 ture plant, extensively cultivated. Perennial : flowers in June and 

 July : grows in pastures : common. Eng. Bot. vol. xxv. pi. 1770. 

 Eng. Fl. vol. iii. p. 302. 1074. 



8. T. medium. Zig-zag Trefoil. Heads egg-shaped, loose ; 

 stems zig-zag ; petals nearly equal ; two upper calyx-teeth rather 



shorter ; stipules linear, parallel. Stems about a foot high, 



branched : leaflets elliptical, notched, hairy : flowers purple. 

 Perennial : flowers in June and July : grows in dry pastures and 

 thickets : frequent. Eng. Bot. vol. iii. pi. 290. Eng. Fl. vol. iii. p. 

 302. 1075. 



9. T. maritimum. Teasel-headed Trefoil. Heads egg-shaped, 

 somewhat hairy ; stipules lance- shaped, erect ; calyx-teeth alter 



flowering dilated, leafy ; leaflets inversely egg-shaped. Stems 



spreading, about a foot long : flowers pale-red. Annual : flowers 

 in June and July : grows in salt marshes, on the eastern and 

 southern coasts of England, and in Ireland. Eng. Bot. vol. iv. pi. 

 220. Eng. Fl. vol. iii. p. 303. 1076. 



10. T. stelldtum. Starry-headed Trefoil. Heads roundish, hairy ; 

 stipules elliptical ; calyx- teeth longer than the corolla, after flower- 

 ing dilated, leafy, the tube closed; leaflets inversely heart-shaped. 



Stems spreading, hairy : flowers light- crimson. Annual : 



flowers in July and August ; found by Mr. Borrer between Shore- 

 ham harbour, in Sussex, and the sea, where it has been natural- 

 ized. Eng. Bot. vol. xxii. pi. 1545. Eng. Fl. vol. iii. p. 304. 1077. 



11. T. arvense. Hare's-foot Trefoil. Heads oval, very hairy ; 

 stipules lance- shaped, bristle-pointed ; calyx-teeth longer than 

 the corolla, permanently bristle-shaped ; leaflets narrow, inversely 



egg-shaped. Stem from four inches to a foot high, erect, 



branched : flowers with pale-red or white petals. Annual: flowers 

 in July and August : grows in dry pastures and fields : common. 

 Eng. Bot. vol. xiv. pi. 944. Eng. Fl. vol. iii. p. 305. 1078. 



12. T. scdbrum. Hard-knotted Trefoil. Heads egg-shaped, ses- 

 sile, axillar ; calyx-teeth unequal, lance-shaped, stiff, ultimately 



recurved; stems procumbent. Stem from three to nine inches 



long, stiff, hairy : flowers whitish. Annual : flowers in May and 

 June : grows in dry sandy fields : not common. Eng. Bot. vol. xiii. 

 pi. 903. Eng. Fl vol. iii. p. 306. 1079. 



13. T. glomerdtum. Smooth round-headed Trefoil. Heads he- 

 mispherical, sessile, axillar ; calyx-teeth heart-shaped, veiny, 



smooth, reflected ; stems prostrate. Stems from three inches to 



a foot long, straight : flowers rose-coloured. Annual : flowers in 

 June : grows in gravelly fields and pastures in the east and south 

 of England. Eng. Bot. vol. xv. pi. 1063. Eng. Fl. vol. iii. p. 307. 



1080. 



14. T. stridtum. Soft-knotted Trefoil. Heads egg-shaped, ses- 

 sile, axillar and terminal ; calyx elliptical, furrowed, hairy, with 



bristle-shaped teeth ; stems procumbent. From four to ten 



inches long : flowers pale rose-coloured. Annual : flowers in June : 

 grows in sandy fields and pastures : frequent. Eng. Bot. vol. xxvi. 

 pi. 1843. Eng. Fl. vol. iii. p. 307. 1081. 



