vernation การใช้

• Vernation lines parallel to the midvein are often visible-a very unusual characteristic.
• Left on the plant, each fiddlehead would unroll into a new frond ( circinate vernation ).
• The fronds of tree ferns also exhibit circinate vernation, meaning the young fronds emerge in coils that uncurl as they grow.
• The first " Cryptocoryne " species was described in 1779 as " Arum spirale " by involute vernation.
• As the number of recognised species increased various attempts were made to divide the species into subgroups, usually on the basis of the pattern of the emerging leaves ( vernation ).
• "Drosophyllum lusitanicum " is native to the western Mediterranean region ( Portugal, Spain and Morocco ), and is one of the few carnivorous plants to grow in dry, sundews, but have the unusual characteristic of coiling'outward'when immature ( outward circinate vernation ).
• ""'Drosera filiformis " "', commonly known as the "'thread-leaved sundew "', is a small, sundew, it is unusual within its genus in that the long, erect, filiform ( thread-like ) leaves of this plant unroll in spirals  an arrangement similar to the circinate vernation seen in ferns.
• Trophophore is sessile or nearly so; stalk 0 10 mm, 0-0.4 in, a tenth to a half the length of trophophore rachis; blade is dull, strongly glaucous, whitish green, deltate ( triangular ), thickly leathery, twice pinnate, with apex bent down in vernation, 2 4 cm, 1-1?in, long and 1?4 cm, ?1?in, broad; ternate, the middle division the largest, broadly oblong to rounded-deltoid, the lateral ones similar or rhombic-oblong, all pinnately parted; pinnae closely imbricate ( overlapping ), up to 6 pairs, strongly ascending, sublunate to flabelliform, broadly crenate to incised, or the larger ones radially cleft into cuneiform lobes; distance between 1st and 2nd pinnae not or slightly more than between the 2nd and 3rd pairs, asymmetrically cuneate; basal pinna pair often divided into 2 unequal parts, lobed to tip, margins entire, sinuate to shallowly crenate, apex rounded to truncate, venation pinnate.