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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.
Arundinella grandiflora
HABIT Perennial. Culms erect; 40–70 cm long; 3 -noded. Culm-internodes distally glabrous. Culm-nodes glabrous, or pubescent. Lateral branches lacking. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface. Ligule a ciliolate membrane. Leaf-blades linear, or lanceolate; 15 cm long; 7 mm wide; stiff. Leaf-blade surface smooth; glabrous; hairless except near base. Leaf-blade margins scabrous. Leaf-blade apex attenuate.
INFLORESCENCE Inflorescence a panicle.
Panicle contracted; linear, or lanceolate; 16 cm long; 2 cm wide. Primary panicle branches appressed; 1–2 -nate; 4–8 cm long. Panicle axis smooth. Panicle branches glabrous.
Spikelets solitary, or in pairs. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent; obtuse.
GLUMES Glumes persistent; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 5 mm long; 0.75 length of upper glume; membranous; 1-keeled; 5 -veined. Lower glume lateral veins prominent. Lower glume surface scabrous; rough on veins. Lower glume apex acuminate; mucronate. Upper glume ovate; 7 mm long; membranous; 1-keeled; 5 -veined. Upper glume lateral veins prominent. Upper glume apex acuminate.
FLORETS Basal sterile florets male; with palea; persisting on inflorescence. Lemma of lower sterile floret similar to upper glume; ovate; 6 mm long; membranous; 1-keeled; 5 -veined; acute. Palea of lower sterile floret 0.75 length of lemma. Fertile lemma oblong; 3.5 mm long; coriaceous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface asperulous. Lemma margins involute; interlocking with palea keels. Lemma apex obtuse; awned; 1 -awned. Principal lemma awn geniculate; 6 mm long overall; with twisted column. Palea 1 length of lemma; coriaceous; 2 -veined. Palea surface asperulous.
FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 2 mm long. Stigmas 2.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform.
DISTRIBUTION Asia-temperate: China.
NOTES Arundinelleae. Hackel 1996.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
