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Descriptions

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

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

Chimaerochloa archboldii

HABIT Perennial; caespitose. Culms erect; 60–90 cm long. Leaf-sheaths glabrous on surface, or pilose. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 1–1.3 mm long. Leaf-blades flat, or involute; 15–30 cm long; 2–4 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy adaxially. Leaf-blade margins scabrous.

INFLORESCENCE Gynodioecious ("male", in this context, indicating the bisexual state). Inflorescence a panicle.

Panicle contracted; oblong, or ovate; 10–12 cm long; 4–7 cm wide. Primary panicle branches 3–8 cm long. Panicle branches pilose.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 5–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pilose.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 5–6 mm long; 1 length of upper glume; membranous; without keels; 3 -veined. Lower glume apex attenuate. Upper glume lanceolate; 5–6 mm long; 1.2 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex attenuate.

FLORETS Fertile florets female. Fertile lemma oblong; 4–5 mm long; chartaceous; without keel; 7 -veined. Lemma surface villous; without hair tufts. Lemma hairs 1 mm long. Lemma apex dentate; 2 -fid; incised 0.1 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; straight, or curved; 5–10 mm long overall; without a column. Lateral lemma awns arising on apex of lobes; 2–3 mm long. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; cuneate; fleshy; ciliate. Anthers 3.

FRUIT Caryopsis with adherent pericarp.

MALE Male inflorescence bisexual similar to female. Male spikelets resembling female.

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Arundineae. Hitchcock 1993.

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