Periwinkles are annual or perennial herbs, sometimes woody at the base of the stem. Very rarely, the stem is woody. Myrrhidendron The stem is hollow or solid. Plants contain secretory cells and canals in all parts, including the pericarp, and are usually aromatic.
View Full Image on Dreamstime
Username: Beekeepx
Editorial: No
Width: 3420 pixels
Height: 2259 pixels
Downloads: 0
Image ID: 185315120