Eleocharis equisetiformis ("Sujinumaharii")

Japanese name: スジヌマハリイ （筋沼針藺）
Scientific name: Eleocharis equisetiformis

[Overview]
A perennial 30–50 cm tall, growing in sandy wetlands.
It does not form clumps but grows in loose tufts.
The stem is cylindrical, about 2 mm in diameter and somewhat hard, with distinct ridges that look like stripes.
Spikelets are borne at the stem tip, and the stigma is divided into 2.
There are 4 bristle-like perianth segments, though they are often not visible (0).
The achene is flat and lens-shaped, and the style base at the top is about 1/3 the length of the achene.
It resembles Numa-harii but can be distinguished by having 5–6 bristle-like perianth segments.

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