Agrostis 'hiemalis'
Agrostis 'hiemalis'
Vegetative form. Perennial, erect or geniculate, caespitose (occasionally with a short horizontal rhizome). Culms to 80 cm high, 4 noded. Mid-culm nodes glabrous. Leaves non-auriculate. Basal leaf sheaths not keeled, terete, densely scabrous (between the veins). Ligule 2-5 mm long, membranous, lacerate (?). Leaf blades flat or involute, 1.5-4 mm wide; shallowly grooved (?); with margins scabrous, apices acuminose; convolute in bud.
Reproductive organization. Plants bisexual. Incomplete spikelets absent. Inflorescence of chasmogamous spikelets.
Inflorescence. Inflorescence a panicle, open, symmetrical. Rachides 100-350 mm long. Primary inflorescence branches of conventional thickness. Spikelets towards the ends of the branchlets.
Hermaphrodite (`perfect') spikelets. Hermaphrodite spikelets pedicellate, 1.8-2 mm long, often strongly purplish, laterally compressed, not disarticulating as a separate unit, disarticulating above the glumes. Pedicels slender. Glumes two per spikelet, similar, subequal, exceeding the florets, longer than the proximal lemma. Lower glume longer than the upper glume, membranous, keeled, muticous, margin hyaline; 1 veined, midvein scabrous. Upper glume membranous, keeled, muticous, margin hyaline; 1 veined, midvein scabrous. Rudimentary florets absent. Incomplete florets absent. Hermaphrodite florets 1 per spikelet. Callus present, blunt. Lemma less firm than the glumes, ovate, 1.25-2 mm long, not keeled, truncate, minutely dentate, muticous. Palea vestigial or absent, minute, hyaline. Lodicules 2, hyaline, ovate. Stamens 3. Anthers less than 0.5 mm long (or 1 mm??). Ovary glabrous. Styles 2, free to their bases.
Fruit. Fruit not seen.
Distribution. Endemic. New South Wales, Victoria, and Queensland (ACT ??).
Ecology. Often in damp or swampy areas. Flowers summer.
Classification. Pooideae; Poodae; Aveneae.
References. Morphology: Jacobs & Hastings (1994).
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.