Linden littleleaf seeds

Littleleaf linden or small-leaved lime or small-leaved linden or little-leaf linden / Tilia cordata

Deciduous tree 20-38 meters tall with a hipped crown. The bark is dark, furrowed on older trees. The leaves are alternate, heart-shaped, long-petiolate, serrated, with a drawn pointed apex, green above, bluish below.

The flowers are regular, bisexual, with a double five-parted perianth, up to 1-1.5 cm in diameter, yellowish-white, fragrant, collected in drooping corymbose inflorescences of 3-11 pieces, with inflorescences there is an oblong yellowish-green stipules. There are many stamens in the flower. Blooms from early July 10-15 days. The nectar-bearing tissue, located on the inside of the bases of the sepals, releases 5-10 milligrams of nectar.

Pollen grains are three-furrowed, spherical-flattened shape. The length of the polar axis is 25.5-28.9 microns, the equatorial diameter is 32.3-35.8 microns. Almost round in outline from the pole, elliptical from the equator. The furrows are slit-like, short, visible only under an immersion lens. Horae are longitudinally elongated, with uneven edges, deeply submerged, with a maximum diameter of 10.5-11 microns; orovaya membrane smooth or fine-grained. Mesoporium width 23.5-28.1 µm. The thickness of the exine in the center of the mesoporium is 2.2 µm, about op 8 µm; the upper layer of the exine, slightly wedging out, covers the ora. The rod layer has a thickness of 0.8-1 µm, the rods are straight or knotted, with rounded or flattened heads. The cells are angular or oval, formed as a result of the fusion of the walls of the rods or their heads; the largest cell diameter is 1.2 µm, the smallest is 0.5 µm. The color of pollen is light yellow-green.

The fruit is a spherical, pubescent, thin-walled, one- or two-seeded nutlet. The fruits ripen in August - September.

The name can be pronounced as sercelista linden, or linden zvichayna, common linden.