Ectrosia nervilemma


Ectrosia nervilemma
(B.K.Simon)Nightingale. Flora of Australia 44B:461 (2005).

Classification. (GPWG 2001) : Subfamily Chloridoideae. Cynodonteae.

Basionym and/or
Replacement Name:
 Planichloa
nervilemma
B.K. Simon, Austrobaileya 2(3): 212 (1986).

Type of Basionym or
Protologue Information
: Australia: Queensland: Cook Distr.: ca. 20 km SE of
Laura on the Peninsular Development Road, 15º39'S, 144º33'E, 25 Apr 1983, J.R.
Clarkson 4679
(HT: BRI; IT: CANB, DNA, K, NSW, PERTH, QRS).

Key references
(books and floras):
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
Australia
(as Planichloa nervilemma).

Illustrations:
[2005] K.Mallet (ed.), Flora of Australia 44B: Poaceae 3 (Fig.
66B-C).

Habit. Annual
or ephemeral. Culms erect or geniculately ascending, stature slender to delicate,
12–40 cm tall, 1–3 -noded. Mid-culm internodes glabrous. Lateral branches
simple. Leaf-sheaths hairy. Ligule a fringe of hairs, 0.2–0.3 mm long.
Leaf-blades flat or conduplicate, 2–10 cm long, 1–4 mm wide. Leaf-blade surface
indumented.

Inflorescence.
Inflorescence compound, a panicle. Panicle oblong, 6–12 cm long, 1.5–3 cm wide.

Spikelets.
Spikelets pedicelled. Fertile spikelets many flowered, with at least 2 fertile
florets (2–8), comprising 2–8 fertile floret(s), with diminished florets at the
apex, oblong or ovate or obovate, laterally compressed, 5–11 mm long.

Glumes. Glumes
similar. Lower glume lanceolate, membranous or coriaceous, keeled, 1-keeled, 1
-nerved. Upper glume lanceolate, 3–4.5 mm long, membranous or coriaceous,
keeled, 1-keeled, 3 -nerved.

Florets.
Fertile lemma 3–6.5 mm long, keeled, winged on keel, 5–7 -nerved. Lemma apex
muticous or mucronate or awned, 1 -awned. Median (principal) awn 0–2 mm long
overall. Palea 2 -nerved. Anthers 3. Grain 1.3–1.5 mm long.

Continental
Distribution
: Australasia.

Australian
Distribution
: Queensland.

Queensland:
Cook.

Notes.
Restricted to the eastern half of Cape York Penin. in northern Qld. Found on
sandy soils with a high species diversity of annual grasses, and an overstorey
of Melaleuca, Casuarina or Eucalyptus.

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