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Digitaria velutina (Forssk.) P.Beauv.

Derivation
Digitaria Haller, Hist. Stirp. Helv. 2: 244 (1768). From the Latin digitus (finger), alluding to the radiating inflorescence branches.

velutina- Latin for velvety (significance unclear).

Published in
Ess. Agrostogr. 51 (1812).


Habit
Annual. Stolons absent. Culms decumbent, 20–80 cm tall, 2–5-noded. Mid-culm internodes glabrous. Mid-culm nodes glabrous. Lateral branches simple or sparsely branched. Leaf-sheaths glabrous on surface. Leaf-sheath auricles present. Ligule an eciliate membrane. Leaf-blades linear or lanceolate, flat, 2–15 cm long, 3–17 mm wide. Leaf-blade surface smooth, hirsute. Leaf-blade margins scabrous.

Inflorescence
Inflorescence subdigitate, with racemose branches. Racemes (3–)7–20, unilateral, 3–13 cm long. Central inflorescence axis 1–7 cm long. Rhachis narrowly winged, angular, glabrous on surface or with scattered hairs, scabrous on margins. Spikelet packing imbricate or lax, 50–80% of their length apart.

Spikelets
Spikelets appressed, in pairs, all alike. Pedicels 0.3–0.7 mm long, scabrous. Fertile spikelets 2-flowered, comprising 1 fertile floret, lower floret sterile, upper fertile, without rhachilla extension, elliptic, dorsally compressed, subacute, 1.5–2.1 mm long, falling entire. Rhachilla internodes brief up to lowest fertile floret.

Glumes
Glumes one (the lower absent or obscure) or two, dissimilar, thinner than fertile lemma. Lower glume ovate, 0–0.24 mm long, 10% of length of spikelet. Upper glume lanceolate, dorsally convex in profile, 1.2–1.6 mm long, 65–80% of length of spikelet, membranous, 3-nerved. Upper glume surface pubescent, hairy between nerves. Upper glume apex acute.

Florets
Basal sterile floret 1, without significant palea. Lemma of lower sterile floret elliptic, 1.6–2 mm long, 100% of length of spikelet, membranous, 7-nerved, with equidistant nerves, with nerves free at apex, puberulous or pubescent, hairy between nerves, eciliate on margins or ciliate on margins, acute. Fertile lemma elliptic, 1.5–2.1 mm long, cartilaginous, much thinner on margins, grey or dark brown, 3-nerved. Lemma surface striate. Lemma margins flat, covering most of palea, ciliate. Lemma apex muticous. Palea cartilaginous.


Continental Distribution:
Africa, Temperate Asia, Australasia, South America.

Australian Distribution:
New South Wales: Central Coast.

Classification. (GPWG 2001):
Panicoideae: Paniceae

Notes
Introduced. Flowers Jan.–May.


Images
Illustrations available:
Spikelet front and back (line drawing)
Australian distribution



Spikelet front and back (line drawing)
© Wheeler et al. 1990


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Australian Distribution
© ABRS


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