Definitions
Century Dictionary and Cyclopedia
- A small but very well-defined group of vascular cryptogamous plants, by some systematists regarded as an anomalous section of the ferns, by others considered as a group of equal taxonomic rank with the true Filices, the Equisetaceæ, Lycopodiaceæ, etc. The prothallium is formed of parenchymatous tissue, and is destitute of chlorophyl, being developed underground; the leaves are not circinate in vernation, and the sporangia, which are endogenous in their origin and without annulus, are never borne on the under side of the green frond. They differ further from the true ferns by the absence or imperfect formation of bundle-sheaths and sclerenchyma in the stems and leaves. The Ophioglossaceæ embrace 3 genera, Ophioglossum, Helminthostachys, and Botrychium.
GNU Webster's 1913
- n. A natural family of succulent ferns cosmopolitan in distribution.
WordNet 3.0
- n. a family of succulent ferns of order Ophioglossales; cosmopolitan in distribution
Examples
“Wagner, W.H. Jr. and Wagner, F.S. (1984). new nothospecies of Moonwort (Ophioglossaceae botrychium).”
“All seven of the ancient fern families from the world’s existing flora of about 36 families occur in the region (Lycopodiaceae, Selaginellaceae, Ophioglossaceae, Marattiaceae, Osmundaceae, Schizaeaceae, and Gleicheniaceae).”
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