Agrostis aff. hiemalis
Tas
Agrostis aff. hiemalis
Tas
Vegetative form. Perennial, caespitose. Leaves mostly basal. Culms to 40 cm high. Mid-culm nodes glabrous. Mid-culm internodes glabrous. Leaves non-auriculate. Basal leaf sheaths not keeled, terete, glabrous, with the veins equally striate. Ligule to 2.5 mm long, membranous. Leaf blades flat or folded, to 40 mm long, to 1 mm wide; with margins scabrous; convolute in bud.
Reproductive organization. Plants bisexual. Incomplete spikelets absent. Inflorescence of chasmogamous spikelets.
Inflorescence. Inflorescence a panicle, purple, open (wide-pyramidal), symmetrical, fully exserted. Rachides to 140 mm long. Primary inflorescence branches widely spreading (undivided in the proximal half, bearing a few spikelets appressed at the tips of the branchlets), filiform. Spikelets on second order branches.
Hermaphrodite (`perfect') spikelets. Hermaphrodite spikelets pedicellate, 2.5 mm long, laterally compressed, not disarticulating as a separate unit, disarticulating above the glumes. Pedicels slender. Glumes two per spikelet, dissimilar, unequal in length, exceeding the florets, longer than the proximal lemma. Lower glume longer than the upper glume, 2.5 mm long, membranous, keeled, muticous; 1 veined, midvein scabrous. Upper glume 2 mm long, membranous, keeled, muticous; 1 veined, midvein scabrous. Rudimentary florets absent. Incomplete florets absent. Hermaphrodite florets 1 per spikelet. Callus present, blunt. Lemma less firm than the glumes, laterally compressed, ovate, 1.75 mm long, membranous, not keeled, truncate; muticous. Lemma 5 veined. Lemma veins obscure. Palea vestigial, minute, hyaline. Lodicules 2, hyaline, ovate. Stamens 3. Anthers c. 0.5 mm long. Ovary glabrous. Styles 2, free to their bases.
Fruit. Fruit c. 1.5 mm long, glabrous.
Distribution. Endemic. Tasmania.
Ecology. Mesophytic.
Classification. Pooideae; Poodae; Aveneae.
Maybe equivalent to A. hiemalis recorded on the mainland, or to A. aff. hiemalis also from the mainland.
References. Morphology: Morris 78 (1991).
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.