perispermn.
/ˈpɛrɪspəːm/, U.S. /ˈpɛrəˌspərm/ Botany.
In some seeds: a layer of nutritive tissue derived from the nucellus and located outside the embryo sac. Formerly also: †the testa or endosperm of a seed (obsolete).
ΘΚΠ
the world > plants > part of plant > reproductive part(s) > seed > [noun] > parts of > albumen
albumen1682
yolk1795
perisperm1800
vitellus1807
vitellin1882
phytalbumose1885
phytalbumin1899
1800 Trans. Linn. Soc. 5 219 He [sc. Jussieu] remarked, that seeds in this natural order contain a crooked embryo without perisperm.
?1810–14 H. C. Andrews Botanist's Repository X. Pl. DCXX A flattened two-leaved crooked embryo enclosed in a farinaceous perisperm.
1819 J. Lindley tr. L.-C. Richard Observ. Struct. Fruits & Seeds 84 Endosperm;..Jussieu called it Perisperm; Gærtner Albumen.
1835 J. S. Henslow Princ. Bot. §269 In many cases this nutriment, or ‘amnios’,..is not wholly absorbed by the ripening ovule; and it ultimately becomes the ‘albumen’ or ‘perisperm’ of the seed, and is then farinaceous, hard, or oily.
1841 Penny Cycl. XXI. 184/1 The external coverings of the seed..are called the testa, perisperm, or spermoderm.
1848 J. Lindley Introd. Bot. (ed. 4) II. 26 The testa, called also lorica by Mirbel, perisperm and episperm by Richard, and spermoderm by De Candolle.
1848 J. Lindley Introd. Bot. (ed. 4) II. 55 The albumen formed in the embryo-sac is called Endosperm. while that formed in the nucleus is called Perisperm.
1885 G. L. Goodale in A. Gray & G. L. Goodale Bot. Text-bk. (ed. 6) II. ii. xiv. 437 If all the food is within the developing embryo sac, it is termed endosperm; if around it, the perisperm.
1952 P. Mann Systematics Flowering Plants ii. 92 The seeds contain perisperm, round which the embryo is curved, except in Pink where the embryo is straight and embedded in the perisperm.
1983 S. Holnes Outl. Plant Classif. (1986) x. 120 Seed with dense mealy perisperm around endosperm and minute embryo.
1992 M. Ingrouille Diversity & Evol. Land Plants 126 In one group of the flowering plants, the centrosperms, (order Caryophyllales), the endosperm is either absent or very scanty but the nucellus is persistent forming a storage tissue called the perisperm.
Derivatives
periˈspermal adj. = perispermic adj.
ΘΚΠ
the world > plants > part of plant > reproductive part(s) > seed > [adjective] > of parts > relating to or having albumen
albuminous1800
perispermic1819
perispermal1847
1847 J. F. Royle Man. Materia Med. 556 The husk and perispermal membrane are inert.
1986 Nordic Jrnl. Bot. 5 229 Nucellus cells bordering on the sides of the chalazal half of the embryo sac divide to form a perispermal sheath around the embryo.
periˈspermic adj. [after French périspermique (1808 in the source translated in quot. 1819)] of, relating to, or having perisperm.
ΘΚΠ
the world > plants > part of plant > reproductive part(s) > seed > [adjective] > of parts > relating to or having albumen
albuminous1800
perispermic1819
perispermal1847
1819 J. Lindley tr. L.-C. Richard Observ. Struct. Fruits & Seeds 23 The origin of the perispermic vessels.
1901 Philos. Trans. (Royal Soc.) B. 194 303 Williamson's perispermic membrane = our membrane of megaspore.
1995 Jrnl. Agric. Sci. 124 427 The perispermic reserves were first transferred to the young seedling.
This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).
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n.1800