Sorghum timorense, commonly known as Downs sorghum, is an annual
tropical Asian and Australasian grass native to the island of Timor,
Australia in the northern portions of the states of Northern
Territory, Queensland, and Western Australia (flourishing in
regions from Kimberley to Pilbara).
Culms (30–300 cm long × 7–13mm in diameter) are upright or
abruptly bent, smooth or lightly frosted with powdery granules, but
softly hairy to bearded at the nodes, with few lateral branches. Roots
are not nodal, but may be partially above the soil level, somewhat
propping the plant up.
Leaf sheaths are either hairless or minutely
pubescent, sometimes lacking oral hairs, or bearded. Ligule
(1.3–3.5mm long) lacks cilia. Smooth, or lightly haired leaf-blades
(30–60 cm long × 5–10mm wide) can be either straight, or
curled, terminating into a thread-like form. If blade's surface has
hairs, they arise from minute bumps (tubercles). The inflorescence is
composed of a bunching, or slackly open panicle (15–40 cm
long), with branches that each terminate in a single raceme. The
panicle axis is smooth.
Panicle branches are angular, or flat, appear
to be covered with minute scabs, and are shaggy with long, weak hairs,
and have enlarged pulvini; they are glabrous or bearded in the axils,
and hairy at the tips. The primary branch of the panicle
(2–11 cm long) lacks branchlets. Racemes bear only a few
fertile spikelets (two to 10 fertile spikelets per raceme). Main stems
(5–6 mm long between nodes) are straight, have cilia on their
margins, break easily at the nodes, and end in an abrupt, slanting
^ a b c Under its treatment as
Sorghum timorense, from its
basionym Andropogon tropicus var. timorense, this plant name was first
published in Vriese, Pl. Ind. bat. orient. 103. 1856. "Sorghum
Germplasm Resources Information Network (GRIN).
Agricultural Research Service
Agricultural Research Service (ARS), United States Department of
Agriculture (USDA). Retrieved 17 November 2011.
^ Andropogon tropicus var. timorense, the basionym of Sorghum
timorense, was first described and published in Révis. gramin. 1:367,
t. 97. 1830. "Andropogon tropicus var. timorense". Germplasm Resources
Information Network (GRIN).
Agricultural Research Service
Agricultural Research Service (ARS),
United States Department of Agriculture
United States Department of Agriculture (USDA). Retrieved 17 November
^ Jacques van Rensburg (14 June 2011). "East Arm Wharf Expansion
Project - Draft Environmental Impact Statement, Volume 2 of 4; Chapter
16" (PDF). EAW Expansion Project DEIS.
Northern Territory Government,
Department of Lands and Planning. p. 10. Retrieved 29 November
^ P. Chukowry; M. Maier (December 2009). "A Vegetation and Flora
Survey of James Price Point: Wet Season 2009" (PDF). Biota
Environmental Sciences. Retrieved 17 November 2011.
^ Clayton, W.D.; Vorontsova, M.S.; Harman, K.T. & Williamson, H.
(2006 onwards). "
GrassBase - The Online World
Grass Flora. Kew. Retrieved 17 November 2011. Check date values
in: date= (help)
GrassBase page for
Photo from FloraBase
Plant List: kew-443702
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