Lilac seeds

Common lilac / Syringa vulgaris - is a popular garden plant, the type species of the genus Lilac of the Olive family. Common lilac is a multi-stemmed deciduous shrub 2-8 meters high. The diameter of each trunk can reach 20 centimeters. The bark is gray or gray-brown, the bark of young plants is smooth.

Shoots end with two buds, rarely one. The terminal buds are thick, tetrahedral, pointed, greenish-olive or reddish, to brown-red, 6-12 mm long. Lateral buds are spaced, somewhat smaller than the terminal buds, but of the same shape and color. The scales on the kidneys are located crosswise. Outer scales 8, inner - 4. All outer scales are keeled, rounded, ending in a point, some are bordered. At the base of the shoots, the buds are small. The leaf scar is very narrow, with 6-7 traces forming one straight line, or in the form of a crescent. Oppositely lying leaf scars do not connect. Flower buds are laid on shoots from last year.

Shoots are greenish-gray or yellowish-gray, glabrous, rounded, with noticeable lenticels, numerous longitudinal narrow cracks.

The leaves are opposite, simple, 4-12 centimeters long and 3-8 centimeters wide, heart-shaped or directly cut at the base, pointed towards the apex, green, glabrous, dense, entire, with petioles up to 3 centimeters long. They fall green. In the southern regions and even middle latitudes, they remain green under the snow all winter.

Flowers 6-10 × 5-8 mm, from lilac and violet to white, fragrant, long-lasting, collected in pyramidal paired, erect or drooping panicles 10-20 cm long. The wild form has non-double, purple flowers of various shades. It blooms annually in May - early June, 20 days, from the age of four.

Pollen grains are three-furrowed, ellipsoidal, rarely spherical. The length of the polar axis is 25.5-34 microns, the equatorial diameter is 23.8-28.9 microns. Almost rounded in outline from the pole, elliptical, rarely rounded from the equator. Furrows 5-7.5 µm wide, short, with uneven edges and unevenly blunt ends; the membrane of the furrows is fine-grained. Mesocolpium width 20.4-23.8 µm, apocolpium diameter 11.9-15.3 µm.

The thickness of the exine in the center of the mesocolpium is 2-2.5 microns, near the furrows - 1.5-1.8 microns (due to the thinning of the rod layer). The rods are thin, with rounded or oblong heads, located at a distance of 1-2 microns from one another. The mekzina is 0.6-0.8 microns thick, the cover is thin. The sculpture is mesh, with rod walls; mesh cells are angular, often elongated, with a maximum diameter of 4 µm. Pollen grains are light yellow in color.

The fruit is a dry two-nested capsule up to 1.5 cm long, with several oblong and leathery-winged seeds, opening along the nests. When the box is opened, the seeds fall to the ground, often flying away from the mother plant due to the presence of a wing. Ripens in autumn.