This section is from the book "An Experimental History Of The Materia Medica", by William Lewis.
Consolida major five Symphytum majus. Symphytum consolida major C, B. Symphytum officinale Linn. Comfry: a rough plant; with large, somewhat oval, pointed leaves; producing, on the tops of the branches, spikes of white or purplish, pendulous, nearly cylindrical flowers, followed each by four shining black seeds: the root is thick and fleshy, black on the outside and white within. It is perennial, grows wild in moist grounds, and flowers in May or June.
The roots of comfry abound with a viscid glutinous juice, of no particular taste or flavour. The dried root, boiled in water, renders a large proportion of the fluid slimy: the decoctions, infpiffated, yield a strong flavourless mucilage, similar to that obtained from althea, but somewhat stronger-bodied or more tenacious, and in somewhat larger quantity, amounting to about three fourths the weight of the comfry. From this analysis it may be presumed, that the con-folida, though rarely employed in practice, is rather superiour to the althea in the several intentions in which that root is made use of; the mucilaginous matter being, in both roots, the only medicinal principle.