Related entry: Parsley seed
Parsley Root. N. F. IV. Petroselini Radix. Petrosel Rad. It is described by the N. F. as "The root of Petroselinum sativum Hoffmann (Fam. Umbelliferae). The entire fusiform root, measuring up to 20 cm. in length and up to 2.5 cm. in thickness at the crown, or broken or cut into pieces; usually cut lengthwise into two or four sections; externally light yellowish, wrinkled longitudinally, somewhat annulate, root scars distinct and corky; fracture tough when damp, brittle when dry; internally, cortex whitish and characterized by numerous, reddish-brown oleoresin cells, cambium zone distinct and brownish; wood about the same thickness as the cortex, slightly radiate and light yellow. Odor aromatic; taste sweetish and pungent. The powdered drug, when examined under the microscope, shows numerous truncate or somewhat angular starch grains up to 0.03 mm. in diameter, reticulate tracheae up to 0.06 mm. in width and thin-walled, lignified fibers with simple pores. Parsley Root yields not more than 6 per cent. of ash." Dose, thirty grains (2 Gm.). (See Petroselinum).
The Dispensatory of the United States of America, 1918, was edited by Joseph P. Remington, Horatio C. Wood and others.