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Descriptions

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

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

Myriocladus paludicola

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 300–800 cm long. Culm-internodes terete. Lateral branches sparse. Leaf-sheaths 4.5 cm long; glabrous on surface. Leaf-sheath oral hairs ciliate; curly. Leaf-sheath auricles erect. Ligule an eciliate membrane. Leaf-blade base broadly rounded. Leaf-blades ovate; 9–30 cm long; 4–10 mm wide; coriaceous. Leaf-blade venation with distinct cross veins. Leaf-blade margins cartilaginous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes numerous; borne along a central axis; ascending, or spreading; unilateral; 4–5 cm long; with branchlets at base of longer racemes. Central inflorescence axis 30–40 cm long; pubescent. Rhachis pubescent on surface.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong; pubescent.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 2–3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 6–8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume linear; 4–4.5 mm long. Lower glume apex setaceously attenuate. Upper glume lanceolate; 6–8 mm long; membranous; without keels. Upper glume apex setaceously attenuate.

FLORETS Basal sterile florets barren; without significant palea; persisting on inflorescence. Lemma of lower sterile floret similar to upper glume; ovate; 5 mm long; membranous; acuminate. Fertile lemma elliptic; 5–5.5 mm long; coriaceous; without keel. Lemma midvein thickened. Lemma margins eciliate, or pubescent. Lemma apex obtuse; muticous, or mucronate. Palea 1 length of lemma. Palea surface glabrous, or pubescent; hairy on back. Apical sterile florets 1 in number; rudimentary.

FLOWER Lodicules 3. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: northern South America.

NOTES Bambuseae. Swallen 1996.

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