New! - Search other data sources for Pseudoraphis paradoxa

Help - Wrong Description?

Kew Data Sources

Kew's Herbarium Catalogue
ePIC - Electronic Plant Information Centre

External Data Sources

Note - this takes you off of our website
Use your browser's back button to return to this page

GrassBase - The Online World Grass Flora

Descriptions

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

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

Pseudoraphis paradoxa

HABIT Perennial; mat forming. Stolons present. Culms prostrate; 30–40 cm long; rooting from lower nodes. Culm-nodes glabrous. Ligule an eciliate membrane, or a ciliolate membrane; 1–1.5 mm long. Leaf-blades floating; 1–5 cm long; 2.75 mm wide. Leaf-blade surface scaberulous; rough on both sides. Leaf-blade apex acute.

INFLORESCENCE Inflorescence composed of racemes.

Racemes borne along a central axis; appressed; 1 cm long; bearing 1 spikelet; bearing 1(–2) fertile spikelets on each. Central inflorescence axis 3–8 cm long. Rhachis angular; scabrous on margins; terminating in a barren extension; extension bristle-like; extension 10–20 mm long. Spikelet packing abaxial.

Spikelets appressed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acuminate; 7.5–10 mm long; falling entire. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.4 mm long.

GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume oblate; 1.5 mm long; 0.15 length of spikelet; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 13–15 -veined. Upper glume surface smooth, or asperulous; rough on veins. Upper glume apex attenuate.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; 13 -veined; acuminate. Fertile florets female. Fertile lemma elliptic; 3.25–3.5 mm long; cartilaginous; without keel; 5 -veined. Lemma margins flat. Lemma apex acute. Palea 1 length of lemma; cartilaginous; without keels.

FLOWER Anthers 3; 3.5 mm long.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 2 mm long. Embryo 0.33 length of caryopsis. Hilum linear.

DISTRIBUTION Australasia: Australia.

NOTES Paniceae. Fl NSW 1993.

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