Assertion: spearmint's leaf | /r/HasProperty | arranged square red stems
Facets:
Source sentences:
text: It is a perennial that grows to 30 inches, glabrous (free from hair or down; smooth) with strong and sweet scent; leaves are sessile and lanceolate, to 2 inches long, acute serrate, arranged along square red stems, petioles about 1/16th inch long; inflorescence is variable; calyx campanulate, teeth nearly equal, [all the petals of a flower called] the corolla is lilac, pink or white.