monochlamydeousadj.
/ˌmɒnə(ʊ)kləˈmɪdɪəs/, U.S. /ˌmɑnəkləˈmɪdiəs/ Botany.
Having only one series of perianth segments, i.e. not having the perianth differentiated into corolla and calyx; spec. (now rare) belonging to the Monochlamydeae, a division or subclass of dictyledonous plants having flowers with only one series of perianth segments or sometimes no perianth, including the Chenopodiaceae, Euphorbiaceae, etc.
ΘΚΠ
the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having or relating to parts > of or having perianth
perigonial1803
dichlamydeous1830
monochlamydeous1830
periantheous1857
perigonal1875
heterochlamydeous1895
homochlamydeous1895
homoeochlamydeous1900
syntepalous1900
1830 J. Lindley Introd. Nat. Syst. Bot. Introd. 24 If it [sc. the calyx] is unaccompanied by the corolla, plants are said to be Monochlamydeous.
a1836 Encycl. Metrop. (1845) VII. 47/2 The Great Nightshade and many other monochlamydeous flowers.
1882 G. Allen Colours of Flowers vi. 111 There would be no reason why flowers with petals should not appear sporadically among monochlamydeous families.
1904 A. B. Rendle Classif. Flowering Plants I. iv. 134 It is often difficult or impossible to say whether a flower is strictly monochlamydeous or apetalous.
1945 W. O. Howarth & L. G. G. Warne Lowson's Textbk. Bot. (ed. 9) ix. 231 Flowers with a single perianth series are haplo- or monochlamydeous and the floral leaves (tepals) are either bracteoid or petaloid.
1974 Jrnl. Indian Bot. Soc. 53 156 The monochlamydeous perianth of Elaeagnus is interpreted as the corolla and not as the calyx as commonly supposed.
1991 Darwiniana 30 155 The showy red monochlamideous [sic] perianth forms a tube in its lower part due to interwoven papilla-like epidermal cells from contiguous tepals.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022).
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adj.1830