Isachne minutula*

Isachne minutula* (Gaudich.) Kunth. Rév.
2: 407 (1831), Suppl. (1834).

(GPWG 2001) : Subfamily Micrairoideae. Isachneae.

Basionym and/or
Replacement Name:
Gaudich., Voy. Monde 410 (1829).

Type of Basionym or
Protologue Information
: India:, Heyne s.n. (HT: B).

Recent synonyms:
I. miliacea, I. brassii.

Key references (books
and floras):
[1878] G.Bentham, Flora Australiensis 7 (625 as ?
Isachne myosotis
), [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
(as I. pulchella).

Habit. Annual.
Culms prostrate, stature slender to delicate, 3–35 cm tall. Mid-culm nodes bearded.
Lateral branches sparsely branched. Leaf-sheaths glabrous on surface or hairy.
Ligule a fringe of hairs, 0.8–1.2 mm long. Leaf-blades elliptic, 1–5 cm long,
2–10 mm wide. Leaf-blade surface indumented.

Inflorescence compound, a panicle. Panicle elliptic or oblong, 2–12 cm long,
0.5–3 cm wide.

Spikelets pedicelled. Fertile spikelets 2-flowered, the lower floret barren
(rarely male), the upper fertile, comprising 1 fertile floret(s), without
rachilla extension, elliptic, dorsally compressed, 1–1.6 mm long.

Glumes similar, thinner than fertile lemma. Lower glume elliptic, herbaceous,
without keels, 5–7 -nerved. Lower glume surface glabrous. Upper glume elliptic,
1.1–1.5 mm long, herbaceous, without keels, 5–7 -nerved. Florets. Basal
sterile florets 1, male, with palea. Lemma of lower sterile floret chartaceous,
3–5 -nerved.

Fertile lemma 1–1.3 mm
long, without keel. Lemma surface indumented. Palea 2 -nerved. Lodicules
present. Anthers 3.

: Tropical Asia and Australasia.

: Western Australia, Northern Territory, Queensland.

Western Australia:
Fitzgerald. Northern Territory: Darwin & Gulf. Queensland:
Cook, North Kennedy.

Introduced. Native to tropical Asia and apparently introduced in Australia. In
tropical and subtropical rain forests, tropical and subtropical sub-humid
woodlands, and coastal grasslands. Occurs in damp shaded forests and swampy
areas. Flowers Mar.-July.

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