GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Anthaenantiopsis perforata

HABIT Perennial; caespitose. Rhizomes short. Culms erect; 17–95 cm long. Culm-internodes terete; 15–17 cm long; distally glabrous, or hirsute. Culm-nodes pubescent. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths 6–10.5 cm long; mostly shorter than adjacent culm internode; hirsute to hispid. Ligule an eciliate membrane; 0.3–0.7 mm long; truncate. Collar pilose. Leaf-blades linear, or lanceolate; 4–22 cm long; 3–8 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface hirsute. Leaf-blade apex acute.

INFLORESCENCE Inflorescence composed of racemes. Peduncle hispid above.

Racemes 7; borne along a central axis; closely spaced; in a multilateral false spike; erect; unilateral; 1–2.5 cm long. Central inflorescence axis 3.5–10 cm long; hirsute. Rhachis semiterete; hirsute on surface. Spikelet packing contiguous.

Spikelets solitary, or in pairs. Fertile spikelets pedicelled. Pedicels linear; angular; unequal; ciliate.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; compressed slightly; 2.7–3.6 mm long; 1.1–1.5 mm wide; falling entire.

GLUMES Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.3–1.2 mm long; 0.1–0.33 length of spikelet; hyaline; 0–1 -veined. Lower glume lateral veins absent. Lower glume surface hirsute. Upper glume oblong; 2.7–3.3 mm long; 0.9–0.95 length of spikelet; membranous; without keels; 5–7 -veined. Upper glume lateral veins ribbed. Upper glume surface hirsute. Upper glume margins ciliate. Upper glume apex obtuse, or acute.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; oblong; 2.7–3 mm long; 1 length of spikelet; membranous; 5–7 -veined; ribbed; hirsute. Palea of lower sterile floret 2.4–3.1 mm long; 1 length of lemma. Fertile lemma elliptic; 2.4–3 mm long; 1–1.3 mm wide; coriaceous; yellow; without keel. Lemma surface papillose. Lemma margins involute. Lemma apex acute; scabrous and pubescent. Palea gaping; 1 length of lemma; coriaceous.

FLOWER Lodicules 2; 0.4 mm long; truncate. Anthers 3; 2 mm long; purple.

DISTRIBUTION South America: western South America, Brazil, and southern South America.

NOTES Paniceae. Fl Paraguay 1997.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.