This section is from the book "An Experimental History Of The Materia Medica", by William Lewis.
Pentaphyllum Pharm. Lond. Quin-quefolium majus repens C. B. Potentilla reptans Linn. Cinquefoil or Five-leaved grass: a trailing plant, with oval serrated leaves, set five together on long pedicles, and pentapetalous yellow flowers (landing solitary on like pedicles: the cup is divided into ten unequal segments, the five innermost of which form a covering to a button of seeds: the root is long and (lender, dark coloured on the outside, and reddish within. It is perennial, grows wild on open clayie grounds, and flowers in June.
The roots of pentaphyllum are mild astrin-gents, and give out their astringent matter both to water and spirit. They have been used in diarrhoeas and other fluxes, in intermitting fevers, sometimes as corroborants and anti-septics in low colliquative acute fevers, in gar-garifms for strengthening the gums, etc. Their virtue is confined chiefly to the red cortical part, the whitish woody fibre in the middle being nearly insipid.