Eleocharis gracilis

About

Eleocharis gracilis the slender spike rush is a slender rush type plant growing from 20 to 50 cm tall, rarely up to one metre tall. Found in small clumps, growing in seasonally moist situations in many parts of south eastern Australia and New Zealand. The specific epithet gracilis is from Latin, and refers to a slender appearance. This is one of the many plants first published by Robert Brown with the type known as "(J.) v.v." appearing in his Prodromus Florae Novae Hollandiae et Insulae Van Diemen in 1810.

Summary from Wikipedia