phyllopodiumn.
/ˌfɪləˈpəʊdɪəm/, U.S. /ˌfɪləˈpoʊdiəm/ 1. Botany.
a. The main axis of a leaf or a fern frond; (also) the base of a leaf-stalk.
ΘΚΠ
the world > plants > part of plant > leaf > petiole or leaf-stalk > [noun] > base
butt1683
pericladium1832
phyllopodium1884
1884 F. O. Bower in Philos. Trans. (Royal Soc.) 175 569 I therefore propose the term phyllopodium to express the whole of the main axis of the leaf, exclusive of its branches.
1897 Proc. Royal Soc. 1896–7 60 419 Each sporophyll at its insertion on the axis, consists of a short basal portion or phyllopodium.
1923 F. O. Bower Ferns I. v. 82 The branches are then arranged in two longitudinal rows, one on either side of a central stalk or rachis, which is continuous below into the stipe or petiole, often of considerable length. The whole of this, including petiole and rachis, may be styled the Phyllopodium.
1951 R. C. McLean & W. R. Ivimey-Cook Textbk. Theoret. Bot. I. xxii. 978 The mature leaf consists of three portions, the lamina, the petiole, and the leaf base or phyllopodium.
1951 R. C. McLean & W. R. Ivimey-Cook Textbk. Theoret. Bot. I. xxii. 979 (caption) Development of the phyllopodium as a leaf sheath.
1999 New Phytologist 143 20/1 An untapered cantilevered beam (the petiole) anchored at one end (by a phyllopodium) and supporting a mass (the lamina) at the other.
b. spec. An expanded and hardened leaf-base found in certain quillworts (family Isoetaceae), providing protection for dormant meristematic tissue. Cf. phyllopode n.
ΘΚΠ
the world > plants > particular plants > ferns > [noun] > quill-wort > part of
phyllopode1875
phyllopodium1986
1986 Systematic Bot. 11 315.2 Phyllopodia are the sclerified remnants of the bases of fully developed leaves and are only noticeable after the disintegration of the surrounding softer tissues.
1992 Ann. Missouri Bot. Garden 79 614/2 In other species [of Isoetes], portions of the leaf bases become sclerotic and remain after the non-sclerotic portions of the leaves have eroded. This produces a distinctive ring of sclerotic phyllopodia covering the apex.
2. Zoology. A broad, flattened limb of the kind found in branchiopod crustaceans.
ΘΚΠ
the world > animals > invertebrates > phylum Arthropoda > class Crustacea > [noun] > subclass Entomostraca > order Phyllopoda > suborder Branchiopoda > member of > trunk appendage
phyllopodium1926
1926 L. A. Borradaile in Ann. & Mag. Nat. Hist. 17 194 I have..argued in support of the view that all the post-antennulary limbs of the primitive crustacean were alike, and that they were flat structures with endites and exites. It is convenient to call such appendages ‘phyllopod limbs’ or phyllopodia, whether they occur in the Phyllopoda (Branchiopoda) or elsewhere.
1933 Philos. Trans. (Royal Soc.) B. 222 270 The trunk limbs are phyllopodia, armed on the inner edge with a series of backwardly projecting endites.
1971 Ecology 52 344/1 Time of death was established by cessation of movement by the phyllopodia.
2001 G. N. Soliman Mideastern Invertebr. Fauna: Pt. II x. 278 The protopod may bear medial endites (e.g., gnathobases) and lateral exites (e.g., epipods, as in the branchiopod phyllopodia).
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).
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n.1884