Dichanthium sericeum (R. Br.) A. Camus. Bull.
Mus. Hist. Nat. (Paris)
27: 549 (1921).
Classification. (GPWG 2001) : Subfamily
Replacement Name: Andropogon
sericeus R. Br., Prodr. 201 (1810).
Type of Basionym or
Protologue Information: LT: R. Brown 6178 [excluding part A], Australia: New South Wales:
Paterson River (BM (photo, BRI, K); ILT: BRI
(fragm. ex K), E (photo, BRI, K), K (photo, BRI)). LT designated by Blake,
Proc. Roy. Soc.
80: 67 (1969).
(books and floras): . R.Brown, Prodromus (201 as Andropogon
affinis),  G.Bentham, Flora Australiensis 7 (529 as Andropogon
sericeus, 530 as Andropogon affinis, Andropogon sericeus), 
C.A.Gardner, Flora of Western Australia 1 Gramineae (330 as D.
superciliatum, 332, 332 as D. humilius),  E.E.Henty, Manual
Grasses New Guinea (69 & as D. superciliatum), 
M.Lazarides in J.Jessop (ed)., Flora of Central Australia (488 as D.
sericeum, D. affine, D. humilius),  D.Sharp & B.K.Simon, AusGrass,
Grasses of Australia,  J.Jessop, G.R.M.Dashorst, F.M.James, Grasses
of South Australia (516),  S.W.L.Jacobs, R.D.B.Walley &
D.J.B.Wheeler, Grasses of New South Wales (207).
 N.T.Burbidge. rev. S.W.L.Jacobs, Australian Grasses (109),  J.Jessop, G.R.M.Dashorst,
F.M.James, Grasses of South Australia (517, fig. 442 & plate 20 as subsp. sericeum
& 518, fig. 443 as subsp. humilius),  S.W.L.Jacobs,
R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South Wales, 4th edn
or perennial. Culms erect, stature robust to moderate, 10–120 cm tall, 4
-noded. Mid-culm nodes bearded. Lateral branches simple or sparsely branched.
Leaf-sheaths glabrous on surface or hairy. Ligule an eciliate membrane, 0.5–1
mm long. Leaf-blades 8–15 cm long, 2–4 mm wide. Leaf-blade surface glabrous or
Inflorescence digitate, with ramose branches. Rhachis fragile at the nodes.
Spikelets sessile, 1 in the cluster. Companion spikelets pedicelled, 1 in the
cluster. Basal sterile spikelets well-developed, 2–6 in number. Companion
spikelets developed, containing empty lemmas, 3–5 mm long. 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, oblong, dorsally compressed, 4–4.5 mm long.
dissimilar, firmer than fertile lemma. Lower glume oblong, membranous or
chartaceous or indurate, much thinner above, without keels, 5–8 -nerved. Lower
glume surface indumented. Upper glume lanceolate, keeled, 1-keeled, 3 -nerved.
Upper glume surface glabrous. Upper glume apex erose. Florets. Basal
sterile florets 1, barren, without significant palea. Lemma of lower sterile
Fertile lemma without
keel, 1 -nerved. Lemma apex entire, awned, 1 -awned. Median (principal) awn
apical, 25–32 mm long overall, with a twisted column. Palea absent. Anthers 3.
Grain 1–2 mm long.
Distribution: Tropical Asia, Australasia, Pacific, and North
Distribution: Western Australia, Northern Territory, South Australia,
Queensland, New South Wales, Victoria, Tasmania.
Western Australia: Gardner,
Fitzgerald, Hall. Mueller, Giles. Northern Territory:
River. South Australia: North-western, Lake Eyre, Gairdner-Torrens
Basin, Flinders Ranges, Eastern, Northern Lofty, Southern Lofty, South-eastern.
Queensland: Burke, Burnett, Cook,
Darling Downs, Gregory North, Leichhardt, Maranoa, Mitchell, Moreton, North
Kennedy, Port Curtis, South Kennedy, Warrego, Wide Bay,
Gregory South. New South Wales: North Coast, Central Coast, Northern
Tablelands, Central Tablelands, Southern Tablelands, North-Western Slopes,
Central-Western Slopes, South-Western Slopes, North-Western Plains,
South-Western Plains, North Far Western Plains, South Far Western Plains. Victoria: Midlands,
Riverina, Volcanic Plain, Wimmera. Tasmania:
Infra-specific taxa: subsp. sericeum, subsp.humilius, subsp. polystachyum.
Lower glume of pedicelled spikelet obovate with sub-apical arch conspicuous, cilia erect from surface; robust annuals D. sericeum subsp. polystachyum
Lower glume of pedicelled spikelet linear to narrowly ovate, cilia not erect from surface; annuals or perennials 2
Spikelets 4.5 x 1–1.4 mm; lower glume 9–10-nerved; raceme usually more than 4 cm long; perennials D. sericeum subsp. sericeum
Spikelets 4 x 1 mm; lower glume 5–7-nerved; racemes less than 4 cm long; annuals D. sericeum subsp. humilius