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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.
Myriocladus steyermarkii
HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 90 cm long; wiry. Culm-internodes terete. Lateral branches ample; arising from upper culm. Culm-sheaths 6–11 cm long. Leaves distichous. Leaf-sheaths 1.5–2 cm long; longer than adjacent culm internode; pubescent; with reflexed hairs. Leaf-sheath oral hairs setose. Ligule an eciliate membrane; 0.3 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades appressed; deciduous at the ligule; linear; 0.9–1.4 cm long; 1.5–2 mm wide; coriaceous. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence composed of racemes; axillary.
Racemes 1; single; 1–1.5 cm long; bearing few fertile spikelets; bearing 3–5 fertile spikelets on each. Rhachis pubescent on surface.
Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels oblong; pubescent.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 6 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.5 mm long; glabrous.
GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 1–2.5 mm long. Lower glume surface pubescent. Lower glume margins ciliate. Lower glume apex muticous, or awned; 1 -awned. Lower glume awn 0.5–1.5 mm long. Upper glume lanceolate; 2–2.5 mm long; membranous; without keels. Upper glume surface pubescent. Upper glume margins ciliate. Upper glume apex acute; muticous, or awned; 1 -awned. Upper glume awn 0.5–1.5 mm long.
FLORETS Basal sterile florets barren; without significant palea; persisting on inflorescence. Lemma of lower sterile floret similar to fertile lemma; ovate; 3–3.5 mm long; membranous; pubescent; obtuse. Fertile lemma elliptic; 3.8–4.2 mm long; coriaceous; without keel. Lemma surface pubescent. Lemma margins ciliate. Lemma apex obtuse. Palea keels ciliate. Palea surface pubescent. Palea apex truncate. Rhachilla extension 1.5 mm long; glabrous, or sparsely hairy; hairy above.
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.
