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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 nodosa
HABIT Perennial; caespitose. Culms erect; 20–45 cm long; 0.8–1.2(–1.5) mm diam.; 7–13 -noded. Culm-internodes distally glabrous. Culm-nodes brown; glabrous. Leaf-sheaths hispid; with tubercle-based hairs; outer margin glabrous. Ligule a ciliolate membrane; 0.3 mm long. Leaf-blades linear; 4–6 cm long; 1 mm wide. Leaf-blade surface pilose; hairy on both sides; with tubercle-based hairs.
INFLORESCENCE Inflorescence a panicle.
Panicle open; oblong; 4–6 cm long. Panicle branches angular; scabrous.
Spikelets solitary, or in pairs. Fertile spikelets pedicelled. Pedicels 0.5–2.5 mm long; ciliate; hairy at tip.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 4.5–4.9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose; obtuse. Floret callus hairs 0.7 mm long; 0.33 length of lemma.
GLUMES Glumes persistent; dissimilar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 3.5 mm long; 0.75 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume surface hispid. Lower glume hairs white. Lower glume apex acuminate. Upper glume lanceolate, or ovate; 4.5–4.9 mm long; membranous; 1-keeled; 5 -veined. Upper glume surface hispid. Upper glume hairs white. Upper glume apex acuminate.
FLORETS Basal sterile florets male; with palea; persisting on inflorescence. Lemma of lower sterile floret similar to upper glume; ovate; 3.2 mm long; membranous; 1-keeled; 5 -veined; obtuse. Palea of lower sterile floret membranous; 2 mm long. Fertile lemma lanceolate; 2 mm long; coriaceous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface asperulous. Lemma margins involute; interlocking with palea keels. Lemma apex awned; 3 -awned. Principal lemma awn geniculate; 6 mm long overall; with twisted column. Column of lemma awn 2.5 mm long. Lateral lemma awns 1.5–1.7 mm long. Palea coriaceous; 2 -veined. Palea surface asperulous.
FLOWER Lodicules 2; cuneate; fleshy. Anthers 3. Stigmas 2.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform.
DISTRIBUTION Asia-temperate: China.
NOTES Arundinelleae. Sun & Hu 1996.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
