Cymbopogon citratus*

Cymbopogon citratus* (DC) Stapf. Kew.Bull.Misc.Inf. 322 (1906).

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

Basionym and/or
Replacement Name:
DC. Cat. Pl. Horti Monsp. 78 (1813).

Type of Basionym or
Protologue Information
: T: Cult. at Montpellier, France, from seed
collected in Asia.

Key references
(books and floras):
[1969] E.E.Henty, Manual Grasses New Guinea
(56), [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of Australia.

Perennial. Rhizomes present, short. Culms 100–200 cm tall. Ligule an eciliate
membrane, 1 mm long. Leaf-blades 45–90 cm long, 5–20 mm wide.

Inflorescence compound, composed of rames. Central inflorescence axis 30–40 cm
long. Rhachis fragile at the nodes.

Spikelets sessile, 1 in the cluster. Companion spikelets pedicelled, 1 in the
cluster. Basal sterile spikelets well-developed, 2 in number (lower raceme).
Companion spikelets developed, comprising 2 subequal glumes without lemmas or
male, 4–6 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, linear or lanceolate, dorsally compressed, 5–6 mm long.

Glumes. Glumes
dissimilar, firmer than fertile lemma. Lower glume lanceolate, keeled,
2-keeled, wingless or winged on keel, winged broadly, 3–4 -nerved. Upper glume
lanceolate, keeled, 1-keeled, 3 -nerved. Florets. Basal sterile florets
1, barren, without significant palea. Lemma of lower sterile floret hyaline.

Fertile lemma without
keel. Lemma apex entire or dentate, muticous or mucronate, 1 -awned. Palea
absent. Anthers 3.

: Africa, Temperate Asia, Tropical Asia, Australasia, Pacific,
North America, and South America.

: Northern Territory. Queensland

Northern Territory:
Darwin & Gulf.

Queensland: Wide Bay

Cultivated as a culinery herb and for lemon grass oil; recorded once as
naturalised in Qld (sterile), but no longer persisting. Flowers Aug in

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