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Descriptions

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

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

Eriachne fastigiata

HABIT Annual, or perennial; short-lived; caespitose. Butt sheaths pallid, or yellow. Basal innovations intravaginal. Culms 27–38 cm long; wiry; 2–4 -noded. Culm-internodes unequal, the lower longer; smooth, or papillose; distally glabrous, or pubescent. Culm-nodes glabrous. Lateral branches ample. Leaves mostly basal. Leaf-sheaths hispid; with tubercle-based hairs; outer margin glabrous. Ligule a fringe of hairs; 1 mm long. Leaf-blades erect, or reflexed; lanceolate; 1.5–2.5 cm long; 1.5–3 mm wide. Leaf-blade surface scaberulous; hispid; hairy abaxially; with tubercle-based hairs. Leaf-blade margins cartilaginous; ciliate. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; 3–4.5 cm long. Primary panicle branches appressed; 0.3–0.7 cm long; bearing 2–3 fertile spikelets on each lower branch.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels 1–4.5 mm long.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets cuneate; laterally compressed; compressed slightly; 3–4 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume elliptic; 1 length of upper glume; membranous; much thinner on margins; without keels; 5–7 -veined. Lower glume apex obtuse. Upper glume elliptic; 2.7–3.7 mm long; membranous; with hyaline margins; without keels; 5–7 -veined. Upper glume apex obtuse.

FLORETS Fertile lemma elliptic, or ovate; laterally compressed; 3–4 mm long; scarious; without keel; 7 -veined. Lemma surface scaberulous; rough above; pubescent; hairy below. Lemma margins involute. Lemma apex acuminate; muticous. Palea 1 length of lemma; scarious. Palea surface pubescent.

FLOWER Anthers 3; 2 mm long.

FRUIT Caryopsis with adherent pericarp; ellipsoid, or oblong; 2–2.25 mm long; dark brown; obtuse.

DISTRIBUTION Australasia: Australia.

NOTES Eriachneae. Lazarides 1994.

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