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DELTA sample data

M. J. Dallwitz and L. Watson

Cynodon Rich.

Including Capriola Adans., Dactilon Vill., Fibichia Koel.

Habit, vegetative morphology. Perennial. Culms 4–60(–100) cm high; herbaceous. Culm nodes glabrous. Leaf blades linear. Ligule present; a fringed membrane (very short), or a fringe of hairs.

Inflorescence. Plants bisexual, with bisexual spikelets. Inflorescence of spicate main branches; not comprising ‘partial inflorescences’ and foliar organs. Spikelet-bearing axes persistent. Spikelets solitary; secund.

Female-fertile spikelets, florets, fruit. Spikelets 1.7–3 mm long; compressed laterally; disarticulating above the glumes, or disarticulating between the glumes. Rachilla prolonged beyond the uppermost female-fertile floret, or terminated by a female-fertile floret (C. incompletus). Hairy callus absent. Glumes two; very unequal to more or less equal; shorter than the adjacent lemmas; awnless; carinate. Upper glume 1 nerved, or 1–3 nerved. Spikelets with female-fertile florets only (normally), or with incomplete florets. The incomplete florets (when present) distal to the female-fertile florets. Female-fertile florets 1. Lemmas entire; pointed, or blunt; awnless; carinate; 1–4 nerved. Palea present; relatively long. Lodicules present; fleshy; glabrous. Stamens 3. Ovary glabrous. Stigmas 2; red pigmented. Fruit small. Hilum short. Pericarp fused.

Photosynthetic pathway, leaf blade anatomy. C4; biochemical type NAD–ME (2 species); XyMS+. Midrib conspicuous; with one bundle only, or having a conventional arc of bundles. All the vascular bundles accompanied by sclerenchyma.

Taxonomy, distribution. Chloridoideae; main chloridoid assemblage. 10 species. Holarctic, Paleotropical, Neotropical, Cape, Australian, and Antarctic.

Anatomical references. This project.

Illustrations. • Habit and ligule - Cynodon dactylon. Cynodon dactylon.

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.’.