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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.
Parapholis marginata
HABIT Annual; caespitose. Culms erect; 5–15 cm long. Leaf-sheaths inflated. Ligule an eciliate membrane. Leaf-blades convolute; 1–2 mm wide. Leaf-blade surface ribbed; scaberulous; rough adaxially. Leaf-blade margins scaberulous.
INFLORESCENCE Inflorescence composed of racemes; subtended by an inflated leaf-sheath; embraced at base by subtending leaf.
Racemes 1; single; smoothly terete; bilateral; 2–6 cm long; bearing 5–10 fertile spikelets on each. Rhachis fragile at the nodes; subcylindrical and excavated. Spikelet packing broadside to rhachis; lax. Rhachis internodes oblong; 0.5–0.6 length of fertile spikelet. Rhachis internode tip transverse.
Spikelets sunken; solitary. Fertile spikelets sessile.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 4–6 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes collateral; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate, or ovate; 4–6 mm long; 1 length of upper glume; coriaceous; 1-keeled; winged on keel; 3–5 -veined. Lower glume lateral veins ribbed. Lower glume apex acute. Upper glume lanceolate, or ovate; 4–6 mm long; 1.1 length of adjacent fertile lemma; coriaceous; 1-keeled; winged on keel; 3–5 -veined. Upper glume lateral veins ribbed. Upper glume apex acute.
FLORETS Fertile lemma oblong; 3.5–5.5 mm long; membranous; without keel; 3 -veined. Lemma apex acute. Palea 1 length of lemma. Palea surface smooth.
FLOWER Anthers 3; 0.4–0.8 mm long.
FRUIT Caryopsis with adherent pericarp; ellipsoid; 2–2.5 mm long. Hilum elliptic. Endosperm liquid.
DISTRIBUTION Europe: southwestern and southeastern. Africa: north. Asia-temperate: western Asia.
NOTES Hainardieae. Runemark.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.