Quick Answer
Mullein and blackberry are often confused due to their similar appearances, but they can be distinguished by their growth habits and leaf characteristics.
Identifying Mullein and Blackberry
Characteristics of Mullein
Mullein plants (Verbascum thapsus) can grow up to 10 feet tall with a single stem, producing large, velvety leaves that are 2-3 inches long and have a soft, hairy texture. The leaves are often arranged in a spiral pattern on the stem. Mullein flowers are yellow and appear in late spring, producing a tall, upright spike. When pressed or bitten, the leaves release a distinct, musty smell that is often associated with mullein.
Distinguishing Blackberry from Mullein
Blackberry plants (Rubus spp.) are typically smaller, growing 3-6 feet tall, with multiple stems that form a thorny, arching structure. Blackberry leaves are typically 2-4 inches long, with 3-5 lobes and a coarse, hairy texture. The leaves have a distinctive ‘V’ shape where the leaf meets the stem. When touched, blackberry leaves have a slightly sticky, resinous feel that is absent in mullein leaves. In late spring, blackberry flowers appear as white or greenish clusters near the tips of the stems, and the fruit forms as a dark purple berry in mid-summer.
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