Anthoxanthum brunonis

Detailed description

Laxly tufted grass. Leaf-sheath glabrous, keeled, ± striate. Ligule 3–5 mm, membranous, rounded, undersides hairy. Collar thick, glabrous. Leaf-blade 70–300 cm × 4–8 mm, tapering, ± strict, subconvolute, subcoriaceous, abaxially and on margins glabrous, adaxially prickle-toothed on edges of and between prominent flat-topped ribs. Culm to 500 mm, internodes glabrous. Panicle 50–120 mm, rather dense (often proliferous on Campbell Island), scarcely spreading, ± nodding; branches usually binate at nodes, glabrous, lower branches subtended by lanceolate bracts; pedicels to 5 mm, scabrid to pilose above. Glumes subequal, ovate-lanceolate, acute, membranous, almost entirely scarious, keel toothed above, 3-nerved; upper 10–14 mm. Florets included by glumes, light brown at maturity. Male floret: lemma 6–7 mm, ovate-oblong, lobes erose 2-4 mm and scarious-tipped, ± appressed long hairs on keel above shorter below, margins sparsely ciliate; awns c.6 mm, slender, ± straight, insertion c.3 mm above base; palea 5–6 mm, ciliate apex bifid, keels hairy above; lodicules 1.00–1.25 mm, ovate-lanceolate, irregularly 1–2-lobed; callus short, hairs 0.5 mm appressed; anthers 2–3.3 mm. Perfect floret: lemma 4–5 mm, broadly ovate, glabrous, appressed shortly hairy at apex with slender subapical mucro 0–1 mm; palea approximately equal to lemma, ovate-oblong, 1-keel, hairy above; lodicules 0.6–1 mm, glabrous. Anthers 1.3–2.0 mm. Ovary c. 1 mm, stigma-styles 4.5–6.5 mm; seed c.2 mm.