DELTA Sample Data
DELTA Sample Data | |
Including Ornithospermum Dumoulin, Tema Adans.
Habit, vegetative morphology. Annual, or perennial. Culms 40–360 cm high; herbaceous; branched above, or unbranched above. Culm nodes glabrous. Ligule present, or absent; when present, a fringe of hairs.
Inflorescence. Plants bisexual, with bisexual spikelets. Inflorescence of spicate main branches (the spikelets often hispid); not comprising ‘partial inflorescences’ and foliar organs. Spikelet-bearing axes persistent. Spikelets paired, or clustered in little secondary racemelets; secund.
Female-fertile spikelets, florets, fruit. Spikelets 2.3–7 mm long; compressed dorsiventrally; falling with the glumes. Rachilla terminated by a female-fertile floret. Hairy callus absent. Glumes two; very unequal; (the upper) shorter than the adjacent lemmas to long relative to the adjacent lemmas; awned, or awnless. Upper glume 5 nerved, or 7 nerved. Spikelets with incomplete florets. The incomplete florets proximal to the female-fertile florets. The proximal incomplete florets 1; male (rarely), or sterile. The proximal lemmas awned, or awnless. Female-fertile florets 1. Lemmas entire; awnless (obtuse to apiculate); non-carinate; with a clear germination flap; 5 nerved. Palea present (the tip reflexed); relatively long. Lodicules present; fleshy; glabrous. Stamens 3. Ovary glabrous. Stigmas 2; red pigmented. Fruit small. Hilum short.
Photosynthetic pathway, leaf blade anatomy. C4; biochemical type NADP–ME (3 species); XyMS–. Midrib conspicuous; having a conventional arc of bundles; with colourless tissue adaxially. Many of the smallest vascular bundles unaccompanied by sclerenchyma.
Taxonomy, distribution. Panicoideae; Panicodae; Paniceae. 30–40 species. Holarctic, Paleotropical, Neotropical, and Australian.
Anatomical references. Metcalfe 1960; this project.
The interactive key allows access to the character list, illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting specified attributes, summaries of attributes within groups of taxa, and geographical distribution.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 1998 onwards. DELTA sample data: descriptions, illustrations, identification, and information retrieval. Version: 21st September 2000. http://delta-intkey.com’.