Digitaria hubbardii

Digitaria hubbardii Henrard. Monogr.
334 (1950).

Classification. (GPWG 2001) : Subfamily
Panicoideae. Paniceae.

Type of Basionym or
Protologue Information
: HT: Whittet 2, Australia (K; IT: NSW).

Recent synonyms:
D. neurachnoides.

Key references
(books and floras):
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
, [2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses
of New South Wales

[2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South
, 4th edn (217).

Habit. Perennial. Rhizomes present. Stolons absent. Culms erect or
geniculately ascending, 20–60 cm tall, 3–10 -noded. Mid-culm internodes
glabrous. Mid-culm nodes glabrous or pubescent. Lateral branches sparsely
branched or branched. Leaf-sheaths antrorsely scabrous, glabrous on surface.
Leaf-sheath auricles absent. Ligule an eciliate membrane, 1 mm long, truncate
or obtuse. Leaf-blades flat or involute, 1.8–10 cm long, 1–3 mm wide.
Leaf-blade surface scabrous, indumented.

Inflorescence subdigitate, with racemose branches. Racemes 3–4, spreading, 2.5–8
cm long. Central inflorescence axis 1.5–4 cm long.

Spikelets pedicelled, 2 in the cluster. Fertile spikelets 2-flowered, the lower
floret barren (rarely male), the upper fertile, comprising 1 basal sterile
florets, comprising 1 fertile floret(s), without rachilla extension,
lanceolate, dorsally compressed, 2.6–3.4 mm long. Rhachilla internodes brief up
to lowest fertile floret.

Glumes. Glumes
thinner than fertile lemma. Lower glume ovate or orbicular, membranous. Upper
glume lanceolate, 2.2–2.8 mm long, membranous, without keels, 3 -nerved. Upper
glume surface indumented. Florets. Basal sterile florets 1, barren,
without significant palea. Lemma of lower sterile floret 100 % of length of
spikelet, membranous, 5–7 -nerved.

Fertile lemma 1.9–2.5 mm
long, without keel. Lodicules present.

: Australasia.

: Queensland, New South Wales.

Maranoa, Warrego. New South Wales: South-Western Slopes, North-Western

The transverse line of lower lemma pubescence which characterizes D.
can be found to a limited extent in D. ammophila and D.

In semi-arid shrub
woodlands, shrub steppe shrublands, acacia shrublands, arid hummock grasslands,
and tropical sub-humid grasslands. Flowers mostly Feb.-Apr.

AVH 2011 


Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith