FIG. 76. WOOD-SORREL (Oxalis acetosella). 



IE. Step. 



One of the most charming of our native wild flowers. Its pure white flowers are streaked with hair-lines of purple. Its 

 trefoil leaves close down upon the stalk at night and during rain. Natural size. EUROPE, N. AFRICA, Jf . ASIA, N. AMERICA. 



51 



