How to identify Broad-leaf sedge (Carex platyphylla)

Photo By Krzysztof Ziarnek, Kenraiz , used under CC-BY-SA-4.0 /Cropped and compressed from original

How to identify Broad-leaf sedge (Carex platyphylla)

Broad-leaf sedge, also known as Wide-leaved sedge

Broad-leaf sedge showcases a lush carpet of foliage, presenting broad, flat leaves that are a striking blue-green hue. Its foliar texture gives off a metallic sheen under sunlight. One may notice that the leaf blades are approximately 0.8 inches (2 cm) wide, a significant trait for this species. During the blooming season, broad-leaf sedge produces brownish flower spikes that modestly rise above the foliage, reaching heights of up to 10 inches (25 cm). The overall clump may spread to form a dense mass up to 18 inches (45 cm) wide. Broad-leaf sedge offers a visual appeal through its distinctive wide leaves that contrast with the slender blades of typical grasses.

Lifespan: Perennial

Plant Type: Grass

Leaf Type: Semi-evergreen, Deciduous

Quickly Identify Broad-leaf sedge

Distinct blue-green leaves with metallic sheen

0.8 inches (2 cm) wide leaf blades

Brownish flower spikes up to 10 inches (25 cm) tall

Spikes of small greenish flowers without petals

Perigynium fruit with subtle tapering 0.08 inches (2 mm) beak

Detailed Traits of Broad-leaf sedge

Flower Features

The flowers of broad-leaf sedge are small and inconspicuous, typically greenish in color. They are arranged in dense, spike-like clusters called spikes. The spikes are 1-2 inches (2.5-5 cm) long and bloom from April to June. Each spike consists of numerous tiny flowers, lacking petals, but with bracts and scales that aid in pollination. The flowers are wind-pollinated and do not produce a noticeable scent, making them more identifiable by their structure than by their fragrance.

Learn About the Flower Glossary

Fruit Features

The fruit of broad-leaf sedge is encapsulated within a small, urn-shaped structure known as a perigynium, which is typically light brown to straw-colored when mature. Each perigynium holds a single seed and measures approximately 0.2 to 0.3 inches (5 to 8 mm) long. The fruit develops following the plant's blooming period from May to July. A key feature for identification is the presence of a tapering beak atop the perigynium, which is subtle and can be up to 0.08 inches (2 mm) long. The texture of the perigynium is slightly inflated and smooth to the touch.

Learn About the Fruit Glossary

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