Thalictrum isopyroides: Red Data Book of Armenia

VU* B 1 ab(iii) + 2 ab(iii)

Category. Vulnerable species. The sub–population of Armenia is situated in the northern border of the main area of distribution. The extent of occurrence is less than 5000 km2, area of occupancy is less than 500 km2. The species faces decline of the extent of occurrence and area of occupancy caused by changes in habitat. The main area of distribution of the species is situated beyond the borders of Armenia, thus the category of threat has been downgraded to EN. It was not included in the first edition of the Red Data Book of Armenia. It is not included in the Annexes of CITES and that of the Bern Convention.

Description. Perennial herb, 10–30 cm. Leaves multi–pinnate; lobes ovate–lanceolate, 2–3 (5) mm long. Panicle oval, small, many–flowered. Pedicels after flowering elongating, horizontally spreading. Perianth calyx–shaped, early deciduous.

Distribution. In Armenia it occurs in Yerevan (Yerevan, Yeranos and Yerakh mountain ranges, Asni village) and Darelegis (between the villages Tigranashen and Zangakatun, Khachik, Gnishik) floristic regions. EOO is 720 km2, AOO is 44 km2, the number of locations is 5. Besides Armenia the species grows in Nakhichevan, South–West, Middle and Central Asia.

Ecological, biological and phytocoenological peculiarities. Grows in middle and upper mountain belts, at the altitudes of 1000–2200 meters above sea level, on stony slopes. Flowering in May, fruiting in June.

Limiting factors. Restricted extent of occurrence and area of occupancy, loss/degradation of habitats caused by anthropogenic factor.

Conservation actions. No conservation actions. Necessary: monitoring of the population state.