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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Ferrocalamus strictus

HABIT Perennial; caespitose. Rhizomes elongated; leptomorph. Culms erect; 500–900 cm long; 20–50 mm diam.; woody; with aerial roots from the nodes. Culm-internodes terete; with small lumen, or solid; 60–80 cm long; scaberulous. Culm-nodes swollen. Lateral branches suffrutescent; erect. Bud prophyll 1 mm long. Branch complement as thick as stem. Culm-sheaths persistent, or tardily deciduous; 30 cm long; 3 times as long as wide; coriaceous; hispid; with black hairs; without auricles; setose on shoulders. Culm-sheath blade lanceolate; deciduous; erect; 4 cm long. Leaves cauline. Leaf-sheaths 15 cm long; pubescent. Leaf-sheath oral hairs setose; 10–20 mm long. Ligule an eciliate membrane; truncate. Leaf-blade base truncate; with a brief petiole-like connection to sheath. Leaf-blades oblong; 30–55 cm long; 60–90 mm wide. Leaf-blade venation with 20–24 secondary veins; with distinct cross veins. Leaf-blade surface puberulous. Leaf-blade margins scabrous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; pyramidal; 30–45 cm long. Primary panicle branches 10–20 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 10 mm long.

FERTILE SPIKELETS Spikelets comprising 3–10 fertile florets; with diminished florets at the apex. Spikelets oblong; subterete; 14–18 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes clavate; 3 mm long.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 3–4.5 mm long; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface puberulous. Lower glume apex acuminate. Upper glume lanceolate; 5 mm long; chartaceous; without keels; 3–5 -veined. Upper glume lateral veins obscure. Upper glume surface puberulous; hairy at apex. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 7 mm long; chartaceous; without keel; 7 -veined. Lemma lateral veins with cross-veins. Lemma surface puberulous. Lemma apex obtuse. Palea surface puberulous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Hsueh & Keng 2002.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.