Ischaemum fragile R. Br. Prodr. 205(1810).
Classification. (GPWG 2001) : Subfamily
Type of Basionym or
Protologue Information: Littora Novae Hollandiae intra tropicum, Collected
on Cook's journey by Banks. T: Australia.
I. baileyi, Digastrium fragile.
(books and floras): . R.Brown, Prodromus (205), 
G.Bentham, Flora Australiensis 7 (522),  E.E.Henty, Manual
Grasses New Guinea
(72 as Digastrium),  D.Sharp & B.K.Simon, AusGrass, Grasses
Perennial. Culms erect or geniculately ascending, 40–110 cm tall, 3–7 -noded.
Mid-culm nodes glabrous or bearded. Lateral branches simple. Leaf-sheaths
glabrous on surface or hairy. Ligule an eciliate membrane, 1–3.5 mm long.
Leaf-blades 6–33 cm long, 3–7 mm wide. Leaf-blade surface glabrous or
Inflorescence solid, a rame, with ramose branches. Rhachis fragile at the
Spikelets sessile, 1 in the cluster. Companion spikelets pedicelled, 1 in the
cluster. Companion spikelets developed, comprising 2 subequal glumes without
lemmas or containing empty lemmas or male, 2–6 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 or ovate, dorsally compressed, 5–7 mm long.
dissimilar, firmer than fertile lemma, shiny. Lower glume oblong, cartilaginous
or coriaceous, much thinner above, keeled, 2-keeled, winged on keel, winged
narrowly, 5–7 -nerved. Upper glume lanceolate, 6–7 mm long, coriaceous, keeled,
1-keeled, winged on keel, 5–7 -nerved. Upper glume surface glabrous. Upper
glume apex awned. Florets. Basal sterile florets 1, male, with palea.
Lemma of lower sterile floret hyaline or membranous, 3 -nerved.
Fertile lemma 3–4 mm
long, without keel. Lemma apex lobed, awned, 1 -awned. Median (principal) awn
from a sinus, 10–18 mm long overall, with a twisted column. Anthers 3.
Distribution: Tropical Asia and Australasia.
Distribution: Northern Territory, Queensland.
Northern Territory: Darwin &
Gulf. Queensland: Cook, Moreton, North
Kennedy, Port Curtis, Wide
Bay, South Kennedy.
savannas and open grasslands with seasonal rainfall. Occurs throughout coastal
Qld and NT, extending to New
Guinea. Flowers Apr.--Dec. and Feb.