Andriy Vasylyovych Yena

4 Questions 9 Answers 0 Followers

Questions related from Andriy Vasylyovych Yena

Dear Colleagues, have anybody dealt with species of Heliotropium europaeum group?

I have failed in finding any new taxonomical paper devoted to these taxa as well as any difference between them. I am afraid our understanding of the european species of the genus has remained how...

19 November 2021 5,146 3 View

Help me please to identify this Hedera species?

I have a big collection of ivy (Hedera) but fail to identify this specimen as species. It has matt leaves all of the similar shapes and with unusual stellate trichomes of 7-8 (10) rays - nearly...

06 October 2020 3,381 4 View

Hou can I infer properly the age of a living tree? Are there accepted methods?

My colleagues an I have found a very old Taxux tree in Crimean Mts. Can morphometric data of the trunk be useful for rather plausible inferring its age? Please help with advice!

14 January 2020 2,457 5 View

I found a new naturalized alien tree in Crimea. Please help me to determine it properly - is it Robinia luxurians or R. neomexicana?

Pedicels and calix are covered with glandular trichomes, the number of leaflets runs 21.

01 January 1970 8,360 6 View