Iseilema trichopus

Iseilema trichopus (Benth.) C. E. Hubbard. Icon. Pl. 33: t. 3286: 7 (1935).

Classification. (GPWG 2001) : Subfamily Panicoideae. Andropogoneae.

Basionym and/or
Replacement Name:
var. trichopus Benth., Fl. Austral. 7: 544

Type of Basionym or
Protologue Information
: Australia,
Hooker's Creek:  Mueller (K holo).

Habit. Annual.
Culms erect, 10–25 cm tall, 1–2 -noded. Lateral branches sparsely branched.
Ligule a fringed membrane, a ciliolate membrane, 1 mm long. Leaf-blades flat or
conduplicate, 6–12 cm long, 3–5.5 mm wide. Leaf-blade surface scaberulous.

Inflorescence compound, composed of rames.

Spikelets sessile, 1 in the cluster. Companion spikelets pedicelled, 2 in the
cluster. Basal sterile spikelets well-developed, 4 in number. Companion
spikelets developed, comprising 2 unequal glumes without lemmas, 3–4 mm long.
Companion spikelet glumes muticous. 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,
lanceolate, dorsally compressed, 7 mm long.

Glumes. Glumes
dissimilar, firmer than fertile lemma. Lower glume elliptic, membranous or
coriaceous, without keels, 8 -nerved. Lower glume surface indumented. Upper
glume lanceolate, coriaceous, 3 -nerved. Upper glume surface indumented. Florets.
Basal sterile florets 1, barren, without significant palea. Lemma of lower
sterile floret hyaline, 0 -nerved. Fertile florets female.

Fertile lemma 3–4 mm
long, 1 -nerved. Lemma apex lobed, awned, 1 -awned. Median (principal) awn from
a sinus, 15–18 mm long overall, with a twisted column. Column 6 mm long. Palea
absent. Anthers 3. Grain 3–3.5 mm long.

: Australasia.

: Western Australia, Northern Territory.

: Gardner.
Northern Territory: Victoria River.

Notes. Growing
in sandy loam. Rare in the tropical W.A.- N.T. border region. Flowers Mar.

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