258 Class XVI. Order V. 



lobes ; styles as long as the inner stamens ; root den- 

 tate. Willd. 



Root dentate, with truncated projections. Petioles semicylin* 

 drical. Peduncles roundish, pubescent, with two opposite, acute 

 bractes. Segments of the calyx oblong, acute. Petals oblong, 

 obliquely emarginate, white, striate, with purple, yellow at base. 

 Stamens alternately long and short. Styles equal to the longer 

 stamens. Woods. May, June. Perennial. 



Not found about Boston, but very abundant in woods from fifty 

 to one hundred miles to the north and west. The American plant 

 has the petals oblong and unequally bilobate, a character which 

 might be considered specific, did not the European plant, as I find 

 from specimens, sometimes present the same figure. 



OXALIS VIOLACEA. L. Violet Wood Sorrel. 



Stemless ; scape umbelliferous, pedicels somewhat 

 pubescent; flowers nodding ; leaves ternate, smooth ; 

 tips of the calyx fleshy ; styles shorter than the outer 

 stamens. 



A handsome species with red or purplish flowers. Leaves 

 inversely heart-shaped as in the other species. Brooklyn, Con- 

 necticut. May. Perennial. 



OXALIS STRICTA. L. Upright Wood Sorrel 



Peduncles umbelliferous ; stem branching, erect ; 

 leaves ternate, obcordate ; styles as long as the inner 

 stamens. L. 



This plant is pretty common about the borders of fields and 

 cultivated grounds. Stem erect, varying greatly in height, ac- 

 cording to the soil in which the plant grows. Leaves ternate, 

 inversely heart shaped, very thin and delicate ; their common 

 petiole long and slender, without stipules. Peduncles axillary, 

 generally longer than the petioles, (in which respect the plant 

 differs from that of Willdenow,) supporting small, terminal 

 umbels of yellow flowers. Fruit beaked, erect. Flowers all 

 summer. 



