Tree with sparse wide crown, 20-35 m tall. The stem usually lumpy, with remarkable buttress, bark splitted. Leaf blade rhombic with wedge-shaped basis without veins. It's firm, both side hairless, green.Top of the blade is long and sharp. Edge of leaf is denticulate. Petiole is hairless, usually the same direction like the blade axis. They are often cover by galls of aphids Pemfigus spirotheceae. The fruit are thick-walled capsules 4-7 cm long. Mature capsules usually breaks through 4 flaps. Seeds in white fuzzr, up to 2,5 mm long. Shoots: Shoots are round, without cork strips, glabrous, shiny, sticky. They are green, light yellow to brown. Frequently we can find short-form of shoots. Natural range: Eurasia (South and Central Europe, Western Asia, north-west Africa; in our area domestic.