单词 | octastichous |
释义 | octastichousadj. Botany. Now rare. Designating or relating to a spiral arrangement of leaves in which there are eight leaves in each turn of the spiral about the stem, and thus eight vertical rows of leaves in the phyllotaxis. ΘΚΠ the world > plants > part of plant > leaf > plant defined by leaves > [adjective] > having leaves in particular arrangement opposite-leaved1798 cross-leaved1860 octastichous1861 1861 R. Bentley Man. Bot. i. iii. 140 A fourth variety of Phyllotaxis..is the octastichous or eight-ranked. 1880 A. Gray Struct. Bot. 124 Octostichous, or Eight-ranked..occurs in the Holly, Aconite. 1936 Bull. Torrey Bot. Club 63 139 The normal leaf arrangement or system in Ailanthus is octostichous or eight-ranked. ?1982 Indian Jrnl. Genetics & Plant Breeding 1981 41 285 In both the jute species.., the phyllotaxy was generally of the octastichous type. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < adj.1861 |
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