Nastus productus

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms scandent; 150–600 cm long; 5–30 mm diam.; woody. Culm-internodes terete; hollow. Lateral branches dendroid. Branch complement many; in a clump; apparently arising below the node; with 1 branch dominant. Culm-sheaths deciduous. Culm-sheath blade triangular; erect; 0.7–0.8 cm long. Ligule an eciliate membrane. Leaf-blades linear; 8–20 cm long; 2–7 mm wide. Leaf-blade venation without cross veins.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; secund; 3–8 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 8–10 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes several; 5–10 empty glumes; lower persistent, upper deciduous (with floret); shorter than spikelet. Upper glume elliptic; 3–4 mm long; coriaceous; without keels; 7 -veined. Upper glume apex obtuse.

FLORETS Fertile lemma elliptic; 7–8 mm long; coriaceous; without keel; 7 -veined. Lemma lateral veins with cross-veins. Lemma apex acute. Palea 1 length of lemma; coriaceous; 6 -veined; without keels. Apical sterile florets 1 in number; barren; elliptic; 1–2 mm long.

FLOWER Lodicules 3. Anthers 6. Stigmas 3. Ovary umbonate.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Bambuseae. WDC.

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