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Poa affinis

Poa affinis
R. Br. Prodr.  179 (1810).

Classification. (GPWG 2001) : Subfamily Pooideae. Tribe Poeae.

Type of Basionym or
Protologue Information
: Australia: apud Portum Jackson, inclusis ripis
aestuarii Hunter's River vel Coal River, R. Brown 6287 (T: BM; IT: K).

Key references
(books and floras):
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
Australia
, [2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses
of New South Wales
(347), [2009] A.Wilson (ed.). Flora of Australia,
Vol 44A. Poaceae 2 (330).

Illustrations:
[2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South
Wales
, 4th edn (347).

Habit.
Perennial. Rhizomes absent or present. Stolons absent or present. Culms 40–120
cm tall. Mid-culm internodes glabrous. Mid-culm nodes glabrous. Lateral
branches simple or sparsely branched. Leaves mostly basal. Leaf-sheaths smooth
or scaberulous, glabrous on surface. Ligule an eciliate membrane or a fringed
membrane, a ciliolate membrane, 0.4–1.1(–2) mm long, abaxially hairy, truncate
or obtuse. Leaf-blades flat, 10–30 cm long, 1–5 mm wide. Leaf-blade surface
smooth or scaberulous, glabrous.

Inflorescence.
Inflorescence compound, a panicle. Panicle lanceolate, 10–22.5 cm long.

Spikelets.
Spikelets pedicelled. Fertile spikelets many flowered, with at least 2 fertile
florets ((2-)3–5(-7)), comprising (2–)3–5(–7) fertile floret(s), with
diminished florets at the apex, lanceolate, laterally compressed, 3.8–6 mm
long.

Glumes. Glumes
similar. Lower glume ovate, membranous, keeled, 1-keeled, (1–)3 -nerved. Upper
glume ovate, 1.5–2.5 mm long, membranous, keeled, 1-keeled, 3 -nerved.

Florets.
Fertile lemma 2.6–2.7(–3.6) mm long, keeled, 5 -nerved. Lemma surface
indumented. Lodicules present. Anthers 3.

Continental
Distribution
: Australasia.

Australian
Distribution
: New South Wales.

New South Wales:
Central Coast, South Coast, Central Tablelands, Central-Western Slopes.

Notes.
Endemic. N.S.W. Typically in dryish sandstone areas near Sydney. Flowers Nov.

 

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