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.

Eustachys paranensis

HABIT Perennial; caespitose. Basal innovations intravaginal; flabellate. Culms erect; 80–117 cm long; 4–5 -noded. Culm-internodes elliptical in section. Culm-nodes brown; glabrous. Lateral branches lacking. Leaf-sheaths longer than adjacent culm internode; keeled. Ligule a fringe of hairs; 0.5 mm long. Leaf-blades flat, or conduplicate; 8–12 cm long; 2–3 mm wide. Leaf-blade surface scabrous; rough adaxially. Leaf-blade margins scabrous. Leaf-blade apex obtuse; apiculate.

INFLORESCENCE Inflorescence composed of racemes; exserted, or embraced at base by subtending leaf.

Racemes 2–5; digitate; unilateral; 4.5–7 cm long. Rhachis angular; scabrous on margins. Spikelet packing broadside to rhachis; crowded; regular.

Spikelets pectinate; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets obovate; laterally compressed; 3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.

GLUMES Glumes persistent; dissimilar; exceeding apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 2.5–2.8 mm long; 0.9 length of upper glume; membranous; without keels; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2.8–3 mm long; 1.25 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute; awned; 1 -awned. Upper glume awn subapical; 1 mm long.

FLORETS Fertile lemma ovate; laterally compressed; 2.2 mm long; chartaceous; dark brown; keeled; 3 -veined. Lemma surface asperulous; rough above; glabrous. Lemma apex acute. Palea 2.1 mm long; 2 -veined. Palea keels scaberulous. Rhachilla extension 1 mm long. Apical sterile florets 1–2 in number; barren; oblong; 1.5–2 mm long. Apical sterile lemmas scabrous; obtuse.

FLOWER Lodicules 2; 0.2 mm long. Anthers 3; 0.6 mm long.

FRUIT Caryopsis with adherent pericarp; trigonous; 1 mm long. Embryo 0.5 length of caryopsis. Hilum punctiform.

DISTRIBUTION South America: Brazil.

NOTES Cynodonteae. Molina 2002.

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