Rytidosperma diemenicum

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

Classification. (GPWG 2001) : Subfamily Danthonioideae. Tribe

Basionym and/or
Replacement Name:
D.I.Morris, Muelleria 7(2): 153–155, f. 5b, 6 (1989).

Type of Basionym or
Protologue Information
: Tasmania: Ouse River-Wild Dog Plains, 1160 m,
streambanks-sandy alluvium till, erosion sites, 7 Jan 1983, A. Moscal 1292
(HT: HO-65782).

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

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

Derivation: L. -ica,
belonging to. From Van Diemens Land, now Tasmania.

Perennial. Rhizomes absent or present, short. Culms 6–53 cm tall, 4–5 -noded.
Leaf-sheaths glabrous on surface or hairy. Ligule a fringe of hairs, 0.5 mm
long. Leaf-blades involute, 12–25 cm long, 2–3 mm wide. Leaf-blade surface
glabrous or indumented.

Inflorescence solid, a panicle. Panicle lanceolate or ovate, 3–5 cm long.

Spikelets pedicelled. Fertile spikelets many flowered, with at least 2 fertile
florets (3–6), comprising 3–6 fertile floret(s), with diminished florets at the
apex, cuneate, laterally compressed, (10–)12–15(–18) mm long.

Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, membranous,
without keels, 3–5 -nerved. Upper glume lanceolate, 10–18 mm long, membranous,
without keels, 3–5 -nerved.

Fertile lemma 2.4–3.3 mm long, without keel, 9 -nerved. Lemma apex lobed,
awned, 3 -awned. Median (principal) awn from a sinus, 11 mm long overall, with
a twisted column. Column 3–4 mm long. Lateral lemma awns present. Lodicules
present. Anthers 3. Grain 1.4–1.6 mm long.

: Australasia.

: Tasmania.

Tasmania: North
East, Central Highlands, Ben Lomond, East Coast, South West, Mt Wellington.

Tasmanian endemic, altitude 900–1380 m, on rock slabs, in wet hollows in peat
on till, dry rock ledges and crevices, in skeletal soils, feldmark. Flowers
Dec. to 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