Stems ascending or erect, branched above, 6 inches to 3 or 4 feet high and frequently reclining on surrounding vegetation, visually hairy, reddish or brown. Leaves bright green, three-fourths to 1 inches broad on petioles 1 to 3 inches long; leaflets broader than long, sharply notched. Flowers yellow, in forking cymes; each flower on a pedicel one-fourth to one-third of an inch long, which is more or less hairy and erect or ascending. Sepals five, lanceolate or narrowly elliptic, one-sixth to one-fourth of an inch long, spreading in fruit; petals five, obtuse or notched at the apex, one-third to nearly one-half of an inch long. Fruit a slender, columnar, erect capsule, about one-half of an inch long, gradually narrowed to the summit; seeds obovoid-oblong with nearly continuous ridges.

Memoir 15 N. Y. State Museum

Plate 121

B. Tall Yellow Wood Sorrel

B. Tall Yellow Wood Sorrel - Xanthoxalis cymosa

In fields, thickets and woods, Ontario to Michigan, south to Florida and Texas. Flowering from May to October.

There are several closely related species of Yellow Sorrel. Those of the northeastern states are illustrated and described by Britton & Brown (Illus. Flora, 2: 432-35, ed. 2) (X. stricta, X. bushii, X. rufa and X. brittoniae).