dictyogenousadj.
/ˌdɪktɪˈɒdʒᵻnəs/, /ˌdɪktɪˈɒdʒn̩əs/, U.S. /ˌdɪktiˈɑdʒənəs/ Botany. Now rare.† 1. In the terminology of J. Lindley: of or relating to the dictyogens. Obsolete.
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the world > plants > part of plant > reproductive part(s) > seed > plant having seed > [adjective] > mono-, di-, or polycotyledonous
monocotyledonous1770
dicotyledonous1785
polycotyledonous1800
monocotyle1828
monocotyledonous1849
dictyogenous1852
dicotyledonary1870
monocotylous1905
monocot1938
polycotyledonary1989
monocotyl1995
1852 J. H. Balfour Class Bk. Bot. I. ii. 139 The venation is reticulated, although the plant is monocotyledonous. It is denominated by Lindley Dictyogenous on that account.
1872 Chambers's Encycl. VII. 270/2 Paris, a genus of plants of the small endogenous or dictyogenous natural order Trilliaceæ.
2. Designating a layer of meristematic tissue in certain monocotyledonous plants (esp. pineapple) from which adventitious root growth occurs, esp. in dictyogenous layer.
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1883 Jrnl. Royal Microsc. Soc. 3 241 The dictyogenous layer, developes [sic] also a special system of fibrovascular bundles intermediate between the root and the stem.
1900 B. D. Jackson Gloss. Bot. Terms 77/1 Dictyogenous layer, a layer of meristem general in monocotyledons, which gives rise to the central ‘body’ and cortex of the young roots.
1949 Bot. Gaz. 110 552/1 The adventitious roots in the pineapple stem originate partly in the dictyogenous layer which lies at the boundary between the cortex and stele and partly in the innermost layers of the cortex.
2000 D. H. Benzing Bromeliaceae ii. 48 Roots originate in the previously mentioned ‘dictyogenous’ zone within about 1 cm of the shoot apex in pineapple.
This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022).
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adj.1852