''Tilia nasczokinii'' Stepanov, commonly known as Nasczokin's lime or Nasczokin's linden, is a rare

deciduous In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, ...

tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...

or shrub

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

Siberia Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive region, geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a ...

Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...

Description

The tree grows to 20 m tall, its bark pale grey and fissured. The leaves are

cordate Cordate is an adjective meaning ' heart-shaped' and is most typically used for: * Cordate (leaf shape) The following is a list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a ...

or broadly

ovate Ovate may refer to: * Ovate (egg-shaped) leaves, tepals, or other botanical parts *Ovate, a type of prehistoric stone hand axe *Ovates, one of three ranks of membership in the Welsh Gorsedd *Vates In modern English, the nouns vates () and ova ...

, up to 15 cm long. The tiny yellowish, almost white flowers of 0.8–1 cm in diameter appear in clusters of 1–3. The

stigmata Stigmata ( grc, στίγματα, plural of , 'mark, spot, brand'), in Roman Catholicism, are bodily wounds, scars and pain which appear in locations corresponding to the crucifixion wounds of Jesus Christ: the hands, wrists, and feet. Sti ...

are stellate, and the ovary is strip-hairy. Long hairs and short hairs grow in longitudinal, alternating rows. The young ovary is white haired and becomes rusty upon maturity. The fruit is flattened.

Ecology

The habitat of ''Tilia nasczokinii'' is coniferous forests of ''Pinus sylvestris''.

Cultivation

The tree is not known to be in cultivation in western Europe or North America.

Etymology

The tree is named for the

n botanist Vladimir D. Nashchokin (russian: Владимир Дмитриевич Нащокин), who studied it.

Conservation status

''Tilia nasczokinii'' is considered a

threatened species Threatened species are any species (including animals, plants and fungi) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of '' critical depen ...

and included in the Red Book of

Krasnoyarsk Krai Krasnoyarsk Krai ( rus, Красноя́рский край, r=Krasnoyarskiy kray, p=krəsnɐˈjarskʲɪj ˈkraj) is a federal subject of Russia (a krai), with its administrative center in the city of Krasnoyarsk, the third-largest city in Si ...

.Stepanov N.V. (ed) (2005): Red Book of Krasnoyarsk Krai. Polikom, Krasnoyarsk, Russia. (2nd edition) One locus is in the conservation zone of the

Stolby Nature Sanctuary Krasnoyarsk Pillars (also known as Stolby) () is a Russian national park located 10 km south of the city of Krasnoyarsk, on the northwestern spurs of the Eastern Sayan Mountains. The site is known for its dramatic rock formations. Over 200,00 ...

References

External links

{{Taxonbar, from=Q3234454 nasczokinii Endemic flora of Russia Flora of Asia Trees of Siberia Trees of Russia