â¢ MORELLO (noun) The noun MORELLO has 2 senses: 1. any of several cultivated sour cherry trees bearing fruit with dark skin and juice. 2. cultivated sour cherry with dark-colored skin and juice. Familiarity information: MORELLO used as a noun is rare.
Petiole. In botany, the petiole is the stalk attaching the leaf blade to the stem. The petiole is the transition between the stem and the leaf blade, and usually has the same internal structure as the stem. Outgrowths appearing on each side of the petiole are called stipules.
Most often the leaf consists of a broad, flat blade, or lamina, in which all basic physiological processes occur, and a leafstalk, or petiole, which attaches the blade to the stem. The petiole enables the leaf to occupy a definite position in relation to the light.