Paspalidium caespitosum

Paspalidium caespitosum C.E.Hubb. Bull.
Misc. Inform.
446 (1934).

Classification. (GPWG 2001) : Subfamily Panicoideae.

Type of Basionym or
Protologue Information
: Australia: Queensland: Darling Downs Dist.: near
Goondiwindi, May 1933, Hirschfield s.n. (HT: K).

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 (322).

Perennial. Rhizomes present. Culms erect, stature slender to delicate, 20–70 cm
tall, 3–7 -noded. Mid-culm internodes hollow, glabrous. Mid-culm nodes
glabrous. Lateral branches simple or sparsely branched. Leaf-sheaths glabrous
on surface. Ligule a fringed membrane or a fringe of hairs, 0.5 mm long. Leaf-blades
involute or convolute, 8–25 cm long, 1–4 mm wide. Leaf-blade surface smooth or
scaberulous or scabrous, glabrous.

Inflorescence compound, a panicle of racemes. Racemes 7–10, appressed,
flexuous, 0.9–2.5 cm long, 2–3 mm wide, bearing 10–25 fertile spikelets on
each. Central inflorescence axis 8–21 cm long.

Spikelets pedicelled. 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, elliptic or ovate,
dorsally compressed, 1.8–2.2 mm long.

Glumes thinner than fertile lemma. Lower glume oblate, membranous, without
keels, 1–3 -nerved. Lower glume surface glabrous. Lower glume apex muticous.
Upper glume elliptic, 1.5–1.8 mm long, membranous, without keels, 5–7 -nerved. Florets.
Basal sterile florets 1, barren, without significant palea. Lemma of lower
sterile floret 100 % of length of spikelet, membranous, 5 -nerved.

Fertile lemma 1.7–2.2
mm long, without keel, 5 -nerved. Lemma apex mucronate.

: Australasia.

: Queensland, New South Wales.

Burke, Burnett, Cook, Darling Downs, Gregory North, Leichhardt, Maranoa,
Mitchell, Moreton, North Kennedy, Port Curtis, South Kennedy, Warrego, Wide
Bay. New South Wales: North-Western Plains.

Closely related to D. distans.

In Brigalow forests,
tropical and subtropical sub-humid woodlands, semi-arid shrub woodlands, acacia
shrublands, and arid tussock grasslands. Flowers mostly Feb.-Sept.


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