Rytidosperma popinensis

Rytidosperma popinensis (D.I. Morris) A.M.
Humphreys & H.P. Linder. Ann. Mo. Bot. Gard. .

Classification. (GPWG 2001) : Subfamily Danthonioideae. Tribe
Danthonieae.

Basionym and/or
Replacement Name:
 Danthonia
popinensis
D. I. Morris, Muelleria 7(2): 157–159, f. 8b, 9 (1989).

Type of Basionym or
Protologue Information
: HT: Morris 8556, Australia: Tasmania: 0.5 km
N of Kempton (HO-92651; IT: AD, HO, NSW).

Recent synonyms:
Notodanthonia popinensis (D.I.Morris) H.P.Linder, Austrodanthonia
popinensis
(D. Morris) H.P. Linder.

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

Derivation: L.
popina,
eating place; -ensis, denoting origin. First collected near
a cafe.

Habit.
Perennial. Culms 20–45 cm tall. Ligule a fringe of hairs. Leaf-blades flat or
involute, 7–15 cm long, 1–2 mm wide. Leaf-blade surface scaberulous.

Inflorescence.
Inflorescence solid, a panicle. Panicle linear or lanceolate, 4–8 cm long.

Spikelets.
Spikelets pedicelled. Fertile spikelets many flowered, with at least 2 fertile
florets (5–6), comprising 5–6 fertile floret(s), with diminished florets at the
apex, cuneate, laterally compressed, 13–15 mm long.

Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, membranous, much
thinner on margins, without keels, 7 -nerved. Upper glume lanceolate, 13 mm
long, membranous, without keels, 5 -nerved.

Florets.
Fertile lemma 3.4–3.5 mm long, without keel, 7 -nerved. Lemma surface
indumented. Lemma apex lobed, awned, 3 -awned. Median (principal) awn from a
sinus, 12 mm long overall, with a twisted column. Column 2.5 mm long. Lateral
lemma awns present. Palea apex dentate. Lodicules present. Anthers 3. Grain 2
mm long.

Continental
Distribution
: Australasia.

Australian
Distribution
: Tasmania.

Tasmania:
Midlands, East Coast.

Notes. This is
closely related to the southern form of R.bipartitum..

Tasmanian
endemic, altitude 200 m, roadside in mown lawn. Flowers Jan.

 

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