few-flowered sedge
... that the perigynia of the few-flowered sedge spring outward when brushed against?
... that the <a href="./Perigynium" id="mwA8c" rel="mw:WikiLink" title="Perigynium">perigynia</a> of the <b id="mwA8g"><a href="./Carex_pauciflora" id="mwA8k" rel="mw:WikiLink" title="Carex pauciflora">few-flowered sedge</a></b> spring outward when brushed against?