protandrousadj.
/prə(ʊ)ˈtandrəs/, U.S. /proʊˈtændrəs/ 1. Botany. Of a flower: having stamens that mature and shed their pollen before the female reproductive organs of the same flower are functional. Of a plant: having such flowers. Cf. protogynous adj. 1.
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 stamens or pistils > having particular order of maturation
homogamous1854
protandrous1870
protogynous1870
synacmic1870
proterandrous1872
proterogynous1875
synanthetic1909
1870 A. W. Bennett in Jrnl. Bot., Brit. & Foreign 8 317 (heading) Protandrous.
1879 A. Gray in A. Gray & G. L. Goodale Bot. Text-bk. (ed. 6) I. vi. §4 219 Dichogamous flowers are Proterandrous (or Protandrous), when the anthers mature and discharge their pollen before the stigma of that blossom is receptive of pollen.
1914 F. E. Fritsch & E. J. Salisbury Introd. Study Plants xx. 251 In some cases the stamens ripen first (protandrous flowers).
1977 Evolution 31 35/2 All the species from habitats with reliable pollinators produce nectar, require a pollinator, and are frequently protandrous.
2002 Ann. Bot. 89 97 An examination of pollen viability and stigma maturation revealed that the species is protandrous.
2. Zoology. Of a hermaphrodite animal: having male reproductive organs that reach maturation before the female organs. Also: of, relating to, or designating hermaphroditism or sex reversal that follows this sequence. Cf. protogynous adj. 2.
ΘΚΠ
the world > animals > invertebrates > colony or compound organism > [adjective] > protandrous
protandric1887
protandrous1890
proterandrous1890
the world > animals > animal body > general parts > sexual organs and reproduction > [adjective] > hermaphrodite > hermaphrodite organs > having male organs mature before female organs
protandric1887
protandrous1890
1890 Proc. Amer. Philos. Soc. 28 119 In those cases where the spermatozoa are developed more directly from smaller cells which never reach the dimensions of ova, we have a totally different case, and one which indicates a protandrous tendency.
1897 T. J. Parker & W. A. Haswell Text-bk. Zool. I. vi. 285 Organs of the ordinary female nematode type are present, and the gonads produce first sperms and afterwards ova. Such animals are said to be protandrous (male products ripe first).
1967 Oakland (Calif.) Tribune 17 May 44/1 The first year he is a male. The second year he's a female, what you call a protandrous hermaphrodite.
1991 New Scientist 7 Sept. 46/1 It may pay to function as a male when small and switch to being female as body size increases, a pattern of sex change known as protandrous (male-first) hermaphroditism.
This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).
<
adj.1870