denticulate

P. resupinate then reflexed, sessile, reniform, shining white, downy; g. radiating, reddish, edge paler, denticulate; sp. minutely warted, subg. 6-7.

From European Fungus Flora: Agaricaceae by George Massee

Stem smooth and glaucous, 6–10° high; leaves elongated-lanceolate or ovate-lanceolate, taper-pointed, sharply serrate or denticulate, acute or attenuate at base, petioled, often whiter and finely pubescent beneath; scales lance-awl-shaped, slightly ciliate.—Dry plains, Ohio to Dak.,

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

Achenes short, 3–4-sided, or in the disk laterally flattened, roughened on the sides, hairy at the summit; pappus none, or an obscure denticulate crown.—An annual rough herb, with slender stems and opposite leaves.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

Glabrate, 8–18´ high; leaves mostly horizontal, ovate, the upper acutish, remotely denticulate, abruptly contracted to winged petioles, not revolute; seeds often only slightly roughened, short and shortly appendaged.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

The “postabdomen,” marked off by the two postabdominal setae, usually has teeth or spines, and ends in two denticulate or ciliate claws, or it may be rudimentary, as in Polyphemus.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 "English Language" to "Epsom Salts" by Various