

How to identify Field burrweed (Soliva sessilis)
Field burrweed, also known as Spurweed, Bindi-eye, Common soliva, Carpet burweed, Bondii
Field burrweed is characterized by its low-growing, sprawling habit, usually not exceeding 2 inches (5 cm) in height. Its slender stems radiate outward from a central point, forming a mat-like appearance. The foliage comprises small, feathery leaves that are arranged oppositely along the stems. During its winter growth season, it produces inconspicuous flowers followed by prickly burs that can be unpleasant to the touch. This broadleaf annual thrives in disturbed areas such as lawns and compacted soils.
Low-growing, sprawling habit not exceeding 2 inches (5 cm) in height.
Small, feathery leaves arranged oppositely along slender stems.
Tiny, yellow-green disk-shaped flowers without ray flowers, bloom from February to July.
Diminutive fruit with two-lobed wings, spines at one end, not exceeding 1/4 inch (6 mm).
Stems varying in color, 1-10 inches (2.5-25.4 cm), with purple spots and varying hairiness.
The leaves of field burrweed are small, feathery, and reminiscent of parsley. They grow on stalks up to 3/4 inch (2 cm) long, with deeply divided blades about 3/4 inch (2 cm) long and 1/2 inch (1.3 cm) wide. These leaf blades are pilose, covered in soft hairs. Initially arranged in a rosette, they later grow alternately along the stems. This unique leaf structure, with soft hairs and a delicate, divided shape, is essential for identifying field burrweed.
The flowers of field burrweed are tiny, yellow-green, and disk-shaped, without any ray flowers. They form in the leaf axils and are roughly hemispherical in shape, measuring about 1/4 inch (0.64 cm) across when mature. These flowers bloom from February to July, making them a notable feature for identification during this period.
The stem of field burrweed is characterized by its green coloration, varying from light to dark shades depending on the conditions. Measuring between 1 to 10 inches (2.5 to 25.4 cm), it is slightly to very hairy, and dotted with distinctive purple spots. The stems can exhibit a slight fuzziness to prominent hairiness and show significant variation in branching patterns, supporting identification. The stem's surface is generally slender and delicate, with a noticeable thin structure enhancing its unique appearance.
The fruit of field burrweed is a diminutive, flat structure not exceeding a 1/4 inch (about 6 mm) in size, characterized by a unique two-lobed wing on either side, granting it a somewhat aerodynamic profile. At one end, it features two distinct spines, with one particularly sharp, likely aiding in its dispersal mechanism. These fruits exhibit a hard texture and typically mature during the warmer seasons of spring and summer, presenting a challenge for those unfamiliar with its spiny defense albeit being a crucial trait for species identification.
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Scientific Classification of Field burrweed