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Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Parapholis incurva
HABIT Annual; caespitose. Culms geniculately ascending; 2–20 cm long. Ligule an eciliate membrane; 0.5–1 mm long. Leaf-blades 0.4–3 cm long; 1–2 mm wide. Leaf-blade surface scaberulous; rough adaxially. Leaf-blade margins scaberulous.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 1; single; incurved; smoothly terete; bilateral; 1–8 cm long. Rhachis fragile at the nodes; subcylindrical and excavated; 1–2 mm wide. Spikelet packing broadside to rhachis; lax. Rhachis internodes oblong; 2.5–5 mm long. 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; 4–6 mm long; 1 length of upper glume; coriaceous; without keels; 3–4 -veined. Lower glume lateral veins ribbed. Lower glume apex acute. Upper glume lanceolate; 4–6 mm long; 1.1 length of adjacent fertile lemma; coriaceous; without keels; 3–4 -veined. Upper glume lateral veins ribbed. Upper glume apex acute.
FLORETS Fertile lemma ovate; 3.5–5.5 mm long; membranous; without keel; 3 -veined. Lemma lateral veins less than two thirds length of lemma. Lemma apex acute. Palea 1 length of lemma.
FLOWER Anthers 3; 0.5–1 mm long.
FRUIT Caryopsis with adherent pericarp; ellipsoid. Hilum elliptic. Endosperm liquid.
DISTRIBUTION Europe: northern, southwestern, southeastern, and eastern. Africa: north, Macaronesia, and south. Asia-temperate: Soviet Middle Asia, Caucasus, western Asia, Arabia, and China. Asia-tropical: India. Australasia: Australia and New Zealand. North America: northwest USA, northeast USA, southwest USA, southeast USA, and Mexico. South America: southern South America.
NOTES Hainardieae. TAC.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.