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Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Arundo micrantha
HABIT Perennial. Rhizomes elongated. Culms erect; reed-like; 200–600 cm long. Culm-internodes hollow. Culm-nodes glabrous. Leaves cauline. Leaf-sheaths glabrous on surface. Ligule a ciliolate membrane. Leaf-blades drooping; 20–80 cm long; 10–70 mm wide. Leaf-blade surface smooth; glabrous. Leaf-blade apex attenuate.
INFLORESCENCE Inflorescence a panicle.
Panicle contracted; oblong; 30–60 cm long. Primary panicle branches profusely divided. Panicle branches scaberulous.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1–2 fertile florets; with a barren rhachilla extension. Spikelets cuneate; laterally compressed; 8–15 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; bearded; hairy in a ring above; obtuse.
GLUMES Glumes persistent; similar; reaching apex of florets; similar to fertile lemma in texture. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 3–5 -veined. Lower glume surface glabrous. Lower glume apex acute. Upper glume lanceolate; 1.25 length of adjacent fertile lemma; membranous; 1-keeled; 3–5 -veined. Upper glume surface glabrous. Upper glume apex acute.
FLORETS Fertile lemma lanceolate; 6–12 mm long; membranous; without keel; 5–9 -veined. Lemma surface villous; hairy below. Lemma hairs 5–8 mm long. Lemma apex acute, or acuminate; muticous, or mucronate. Palea 0.5–0.7 length of lemma; 2 -veined. Palea keels ciliolate.
FLOWER Lodicules 2. Anthers 3; 2.5–3 mm long. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp; ovoid; 2 mm long. Embryo 1 length of caryopsis. Hilum punctiform.
DISTRIBUTION Europe: southwestern and southeastern. Africa: north. Asia-temperate: western Asia.
NOTES Arundineae. FTA.
ADDITIONAL CHARACTERS Callus hairs oblique.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.