Acotyledonous
Webster's Revised Unabridged Dictionary
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Acotyledonous
Having no seed lobes, as the dodder; also applied to plants which have no true seeds, as ferns, mosses, etc.
Century Dictionary and Cyclopedia
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acotyledonous
Without cotyledons, or seed-lobes, as the embryo of Cuscuta; more usually, without embryo (and consequently without cotyledons), as cryptogams.
Usage in literature
I am quite convinced that the true subordinate groups of Acotyledones are far from being discovered. "Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by