A Grammatical Dictionary of Botanical Latin

Vernation, the manner in which leaves, sepals or petals are arranged within the unopened bud; [> L. vernatus > vernare to flourish, be verdant; note that vernus,-a,-um (adj.A) refers to spring, just as aestivus to summer; cf. aestivation, which refers to the arrangement of the petals or other flower parts]; vernatio,-onis (s.f.III), abl. sg. vernatione;

- "When of a folded kind this may be conduplicate (vernatio conduplicata), with the leaf folded lengthwise along the midrib so that the two halves of the upper side face one another.

- pleated or plicate (vernatio plicata), with the leaf folded several times lengthwise along the primary veins like the pleats of a closed fan;

- reclinate (vernatio reclinata), with the leaf bent downwards;

- wrinkled, crumpled or corrugated (vernatio corrugata);

- equitant (vernatio equitans), with the leaves overlapping entirely and in parallel;

- obvolute (vernatio obvoluta), when the margin of one leaf overlaps that of the leaf opposite.

- When of a rolled kind the vernation may be revolute (vernatio revoluta), with both margins of the leaf rolled back towards the midrib on the lower side;

- involute (vernatio involuta), with both margins rolled forward towards the midrib on the upper side;

- convolute (vernatio convoluta, ver. convolutiva, ver. supervolutiva), when the leaf is wholly rolled lengthwise from one margin, so that one margin is at the center of the coil and the other outside;

- circinate (vernatio circinata), when the leaf is rolled spirally from the apex downwards;

- folia juniora convolutiva nec conduplicata, young leaves convolute not conduplicate.

- folia vernatione plicata, leaves with plicate vernation (Stearn 1983).

Of plants in leaf-bud:

- stipulae vernatione folia claudentes (B&H), the stipules in leaf-bud enclosing the leaves.

- gemmae stipulares teretes, stipulis membranaceis vernatione folia conduplicativa recta invicem claudentibus (B&H), stipular buds terete, with the stipules membranous, on both sides enclosing the straight, conduplicate leaves.

- folia truncata, sinuato-4-loba, vernatione in gemma complanata recurvato-inversa nec conduplicata, stipulis oppositis (B&H), leaves truncate, sinuately 4-lobed, with the vernation in bud complanate, recurved-inverted not conduplicate, with the stipules opposite.

- folia alterna, vernatione involuta (B&H), the leaves alternate, with the vernation [i.e. in bud] involute.

amplexus,-a,-um (part.A), q.v., embraced, encircled, clasped; “embracing. A term of vernation, when the two sides of one leaf overlap the two sides of the next leaf above it” (Lindley).

crispativus,-a,-um (adj.A): “this term has only been used for that kind of vernation in which the surface of a leaf is very much elevated or crumpled” (Lindley).

Praefoliatio, -onis (s.f.III), abl. sg. praefoliatione: “the arrangement of leaves in a leaf-bud” (Lindley), = vernation.