When, as with some plants like Verbascum, the thick hard stems are liable to cause the leaves to wrinkle in drying by removing the pressure from them, small pieces of bibulous paper or cotton wool may be placed upon the leaves near their point of attachment to the stem.
Verbascum Blattaria: hardy, 3 to 4 ft., yellowish, with purple hairs on the filaments; in tall spikes.
They are occasionally adulterated with the leaves of Inula Conyza, ploughman's spikenard, which may be distinguished by their greater roughness, their less divided margins, and their odour when rubbed; also with the leaves of Symphytum officinale, comfrey, and of Verbascum Thapsus, great mullein, which unlike those of the foxglove have woolly upper and under surfaces.
Powdered Digitalis leaf is occasionally adulterated; the following leaves have been substituted for the true drug: mullein (Verbascum thapsus, fam.
Mullein (Verbascum thapsus) oil has anti-inflammatory properties and may be apppied to the infected ear canal (one to three drops every three hours) to help soothe and heal the ear.
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