Rosacea
ACNE ROSACEA, GUTTA ROSEA, an affection which appears on the face, especially the nose, forehead, cheeks, and skin, characterized by an intense intense reddening of the skin without swelling. Persons who indulge in alcohol to excess are liable to it.
ROSACEÆ, roseworts; an order of plants placed by Lindley under his Rosal Alliance. Calyx four or five-lobed, free or adhering to the ovary; petals five, perigynous, equal; stamens indefinite, rising from the calyx just within the petals, curving inward in æstivation; ovaries several or only one; ovules two or more, generally suspended; fruit either one-seeded ROSAMOND nuts or acini, or several-seeded follicles; the leaves are simple or compound, generally with two stipules. Herbaceous plants or shrubs. The rosacex are closely akin to the pomaceæ, the drupaceæ, the sanguisorbex, and some other orders.
They are divided by Lindley into five families or tribes, rosidæ, potentillidæ, spiræidæ, quillaiæ, and neuradea. The rosaceæ occur chiefly in the temperate and cold parts of the Northern Hemisphere; when they occur in the tropics it is generally on high land. They are in general astringent, and have been regarded as febrifuges. A recent estimate gives 90 genera and 1,500 species.