Agrostis adamsonii Vickery,
Contr. New South Wales Natl. Herb. 1: 107 (1941).
Agrostis adamsonii Vickery,
Contr. New South Wales Natl. Herb. 1: 107 (1941).
T: Melbourne, Vic., 12 Nov. 1853, Adamson 226; T: K.
Vegetative form. Annual, erect or geniculate. Culms 45-70 cm high, c. 5 noded. Mid-culm nodes glabrous, hidden by the leaf sheaths. Mid-culm internodes hollow, glabrous or scaberulous. Leaves non-auriculate. Basal leaf sheaths scabrous (in the grooves), with the veins equally striate. Ligule 3-5 mm long, membranous, laciniate, abaxially hairy. Leaf blades linear, 80-250 mm long, 1-3.5 mm wide; adaxially scabrous, shallowly grooved; abaxially scabrous; with margins scabrous, apices acuminose; convolute in bud.
Reproductive organization. Plants bisexual. Incomplete spikelets absent.
Inflorescence. Inflorescence a panicle, green, large, open, symmetrical, partially exserted or fully exserted. Peduncles retrorsely scabrous. Rachides 200-250 mm long, scabrous. Primary inflorescence branches scabrous; clustered, spreading (bare at the base, then 2-3 times 3-nately divided, with few spikelets at the ends of the branches), filiform, verticillate.
Hermaphrodite (`perfect') spikelets. Hermaphrodite spikelets pedicellate, 3-3.5 mm long, laterally compressed, ovate to elliptic. Pedicels 2-8 mm long, slender, subclavate, scabrous. Glumes two per spikelet, similar, subequal, exceeding the florets, longer than the proximal lemma. Lower glume membranous, keeled, acuminate to acute, muticous; 1 veined, midvein scabrous. Upper glume membranous, apically keeled, acuminate to acute, muticous; 1 veined, midvein scabrous. Rudimentary florets absent. Incomplete florets absent. Hermaphrodite florets 1 per spikelet. Rachilla hairy, apically prolonged; prolongation 0.2-0.5 mm long. Callus present, blunt, with short hairs,. Lemma firmly membranous, not keeled, dentate, 4 -lobed; awned. Lemma 5 veined. Lemma veins obscure, glabrous; intercostal regions glabrous. Awns 1, median. Median awn 1 veined, subapical. Palea fully developed, slightly shorter than the lemmas, membranous, shortly bifid. Lodicules 2, free, hyaline, oblong. Stamens 3. Anthers 0.4-0.6 mm long. Ovary glabrous. Styles 2, free to their bases.
Fruit. Fruit elliptical, longitudinally grooved, glabrous.
Distribution. Endemic. Victoria.
Ecology. Mesophytic.
Classification. Pooideae; Poodae; Aveneae.
References. Morphology: Vickery 108 (1941).
Cite this publication as:
C.M. Weiller, M.J.
Henwood, J. Lenz and L. Watson (1995 onwards). `Pooideae (Poaceae) in
Australia - Descriptions and Illustrations'. URL
http://muse.bio.cornell.edu/delta/
Dallwitz
(1980) and Dallwitz, Paine and Zurcher (1993)
should also be cited.