serotinal

Adjective

serotinal (not comparable)

1. Synonym of serotine (“developing at a later time or later in a season, especially than is customary with allied species; specifically (botany), of a plant: flowering late in a season”).
   • Soon, however, the allantois undergoes changes of development looking towards the formation of the placenta at the base of the ovum, where the chorionic villi becomes more and more developed, the serotinal tissue growing toward and around them and encapsulating them, while at the same time the...1878 June 22, Dr. Ford, “Aborted Ovum, and Fœtal Monstrosity”, in Tho[ma]s F. Rumbold, Hiram Christopher, editors, The Saint Louis Medical and Surgical Journal, volume XXXV, St. Louis, Mo.: Geo[rge]...
   • The inner (chorionic) surface [of the placenta] exhibits ramifications of the umbilical vessels, and is closely covered on its fœtal side by the amnion; from its placental (outer, serotinal) side multitudes of arborescent vasculi villi arise[…].1883, Harrison Allen, “Embryology and the Study of Malformations”, in A System of Human Anatomy. […], section VI (Organs of Sense, of Digestion and Genito-urinary Organs), Philadelphia, Pa.: Henry...

   Synonyms:

   serotinous, serotine

2. (often) Occurring in or pertaining to late summer.
   • The psoraleas, prairie clovers and blazing stars would probably occur to all us among the most the most abundant of the secondary species in the vernal, estival and serotinal aspects of the prairies respectively.1898 June 15, Roscoe Pound, Frederic E[dward] Clements, “A Method of Determining the Abundance of Secondary Species”, in Conway MacMillan, editor, Minnesota Botanical Studies: Reports of the Survey...
   • Whenever societies are well developed, they regularly manifest a fairly definite seasonal sequence, producing what have long been known as aspects[…]. As phenomena of the growing season, these were first distinguished as early spring or prevernal, vernal proper, estival, and serotinal or autumnal...1936, Frederic E[dward] Clements, “Nature and Structure of the Climax”, in A[rthur] G[eorge] Tansley, editor, Journal of Ecology, volume XXIV, Cambridge, Cambridgeshire: University Press [for the...