70 CALYCIFLOR^ 



round prickly heads, which are both terminal and axillary ; calyx- 

 teeth broad, very acute, reflexed ; corollas small, bright pink ; stems 

 prostrate. Gravelly places near the sea, in the south and east 

 of England ; not common. Fl. June. Annual. 



13. T. suffocatum (Suffocated Clover). A minute, procumbent 

 plant, with tiny ovid heads of whitish flowers, which are sessile. 

 Leaves stalked ; leaflets obovate, glabrous ; calyx-teeth narrow 

 and recurved. Sandy places near the sea ; rare. Fl. June, July. 

 Annual. 



14. T. resupinatum (Reversed Clover) Stems branched, leafy 

 below, about a foot long ; flower-heads small, axillary, on short 

 stalks ; the corollas are small and pink, with the standards curving 

 outwards instead of inwards. Not a native, but is sometimes found 

 in the south of England. Fl. June, July. Annual. 



15. T. subterraneum (Subterranean Trefoil). Flowers 3-5 to- 

 gether, in axillary heads, at first erect, in fruit abruptly bent 

 down, and sending out branched fibres, which penetrate into the 

 ground. A curious little plant, a few inches long, with prostrate, 

 branched stems and white or pink flowers, which are remarkable 

 for the above-named character of bending down and, by the help 

 of the altered calyx, burying the seed in the ground while yet 

 attached to the plant. Dry banks ; not uncommon. Fl. May, 

 June. Annual. 



16. T. fragiferum (Strawberry-headed Trefoil). Stem creeping ; 

 flower-heads globose, on long stalks ; calyx, after flowering, mem- 

 branaceous and remarkably inflated. This plant has somewhat 

 of the habit of T. repens, but the flowers are light purple, and the 

 heads of inflated calyces, which are often tinged with pink, are 

 not unlike the fruit from which the plant receives its name. Dry 

 meadows and pastures, not uncommon. Fl. July, August. 

 Perennial. 



17. T. repens (White or Dutch Clover). Stem creeping, taking 

 root at the nodes ; flowers in roundish heads, stalked, finally bent 

 back : legumes 2 to 4-seeded ; the flowers are white, sometimes 

 tinged witn pink, and fragrant ; leaflets toothed, frequently having 

 a mark in the centre. Abundant in meadows, where it forms 

 excellent pasture. Fl. through the summer. Perennial. 



In a variety commonly cultivated in gardens under the name 

 of Shamrock, nearly the whole of the centre of each leaflet is tinged 

 with dark purple. The real Shamrock is this species, and, perhaps, 

 any other " 3-leaved grass " which grows in similar situations. 

 Much discussion about the identity of Shamrock might have been 

 saved by recollecting that St. Patrick's day falls at a season (17 March) 

 when the botanical characters of the trefoils are scarcely developed 

 and that the devotees of that saint cap hardly be expected 



