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DELTA sample data

M. J. Dallwitz and L. Watson

Anisopogon R.Br.

Habit, vegetative morphology. Oat-like perennial. Culms 60–110 cm high; herbaceous. Culm nodes glabrous. Leaf blades linear-lanceolate; 2–3 mm wide. Ligule a fringed membrane (the membrane short to relatively long, hairy on the back).

Inflorescence. Plants bisexual, with bisexual spikelets. Inflorescence paniculate; open; not comprising ‘partial inflorescences’ and foliar organs. Spikelet-bearing axes persistent. Spikelets not secund.

Female-fertile spikelets, florets, fruit. Spikelets 40–60 mm long; compressed laterally; disarticulating above the glumes. Rachilla prolonged beyond the uppermost female-fertile floret (the slender prolongation 6–8 mm long, in the palea groove). Hairy callus present (about 6 mm long, with dense, white hairs). Glumes two; more or less equal (the upper slightly longer); long relative to the adjacent lemmas; awnless; non-carinate. Upper glume 7–9 nerved. Spikelets with female-fertile florets only, or with incomplete florets (usually with a single, abortive floret). The incomplete florets distal to the female-fertile florets. Female-fertile florets 1. Lemmas incised; awned. Awns 3; from a sinus; geniculate; much longer than the body of the lemma (up to 8 cm long). Lemmas non-carinate (rounded on the back); without a germination flap; 3 nerved. Palea present; relatively long (narrow, lanceolate). Lodicules present; membranous (two ‘stipoid’ and larger, the third smaller and flimsier); glabrous. Stamens 3. Ovary hairy (sparingly so, towards the apex). Stigmas 2, or 3; white. Fruit medium sized. Hilum long-linear. Pericarp free, or loosely adherent.

Photosynthetic pathway, leaf blade anatomy. C3; XyMS+. Midrib not readily distinguishable; with one bundle only. All the vascular bundles accompanied by sclerenchyma.

Taxonomy, distribution. Arundinoideae; Stipeae. 1 species. Australian.

Anatomical references. This project.

We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key, which allows access to the character list, illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa. See also Guidelines for using data taken from Web publications.

Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 1998 onwards. DELTA sample data: descriptions, illustrations, identification, and information retrieval. Version: 19th October 2016.’.