

How to identify Common corncockle (Agrostemma githago)
Common corncockle, also known as Corn pink, Zizany
Common corncockle exhibits a robust herbaceous form, characterized by its downy, erect stems and narrow, opposite leaves. This annual is distinguished by prominent, vivid flowers, each revealing five ovate petals ranging from pink to purple shades. These conspicuous blooms, approximately 1 inch (2.5 cm) in diameter, grace the plant throughout the summer months, presenting a solitary, yet eye-catching appearance atop the stem. The visual appeal of common corncockle is complemented by its ability to thrive in a variety of disturbed habitats.
Robust herbaceous form with downy, erect stems.
Prominent, vivid flowers with 5 ovate petals in pink to purple shades.
5 sepals extending beyond delicate, tapered petals give flowers a distinctive appearance.
Dry capsule fruit with black, pitted seeds measuring up to 0.12 inches (3 mm).
Slender, silky-haired stem with light green color and minimal branching.
The leaves of common corncockle are opposite, sessile, and narrow, reaching up to 6 inches (15 cm) in length. They are lanceolate to linear in shape, with entire margins and bases that somewhat clasp the stem. The leaves are covered in fine hairs, adding a distinctive texture. The simple leaves exhibit a green coloration, with no evident complex vein pattern. Their slender, elongated form and hairy surface are key identification features.
The flowers of common corncockle are 1-1.5 inches (2.5-3.8 cm) wide, featuring 5 pink or purplish petals. The 5 sepals extend beyond the petals, giving them a distinctive look. Each flower grows singly on long stalks emerging from the leaf axils and blooms throughout the summer. The petals are delicate with a slightly tapered shape, and the sepals form a cup-like structure around the base. These flowers do not have a noticeable scent.
The stem of common corncockle is slender and silky-haired, characterized by a smooth texture. It features a light green coloration and measures approximately 1-2 feet (30-60 cm) in height. The stem is delicate and flexible, often displaying a slight curvature. Branching is minimal, with few secondary branches. The stem's fine hairs give it a soft, silky appearance and feel, aiding in its identification.
The fruit of common corncockle is a dry capsule that opens upon maturity to release its contents. It typically measures around 0.6 to 1.2 inches (1.5 to 3 cm) in length. This capsule is filled with numerous black seeds that are noticeably pitted, giving them a rough texture. The seeds of common corncockle are small, with a size that generally does not exceed 0.12 inches (3 mm) in diameter. The contrasting black color of the seeds against the lighter color of the opened capsule can aid in identification. These seeds are a key feature for recognizing the fruit of common corncockle.
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Scientific Classification of Common corncockle