Greater Tussock Sedge

It thrives in fens, swamps, wet woodlands, and along lake, pond, and river edges, typically favoring base-rich environments. However, it tends to diminish in size and produce fewer fruits in shaded habitats.

Identification

It forms dense tussocks comprised of tall, triangular, dark-green stems, reaching up to 150cm in height. The over-wintering leaves are keeled with toothed margins, tapering to a three-angled tip. It bears a dense panicle of numerous spikelets, typically with male florets positioned above and female florets below. Occasionally, the male florets may be absent. The bracts are short or sometimes absent altogether.

More details can be found at https://www.irishwildflowers.ie/pages-sedge/s-10.html.