Crataegus azarolus L. var. senobaaensis Doenmez, 2019

Doenmez, Ali A. & Oezderin, Sevgin, 2019, Additional contributions to taxonomy, nomenclature and biogeography of the Turkish Crataegus (Rosaceae) taxa, PhytoKeys 122, pp. 1-13 : 1

Crataegus azarolus L. var. senobaaensis Doenmez var. nov. Figure 1

Diagnosis.

This new variety differs from the other varieties ( Crataegus azarolus L. var. minuta Browicz and Crataegus azarolus L. var. dentata Browicz and Crataegus azarolus L. var. aronia L.) by its deeply divided leaf sinuses, mostly 3-4 pairs of leaf lobes and mostly ovate-oblong leaves at outline.

Type.

TURKEY. Şırnak: 20 km from Uludere to Şırnak, above Şenoba, steppe, ca. 1250 m elev., 28. September 2002, A.A. Dönmez 11139, (holotype: HUB, isoptypes, HUB, EGE). Paratypes: Bitlis: Tatvan, Koruklu village, Yenitoprak district, 1734 m elev., hedge, 02.10.2013. A.A. Dönmez 18745- K. Özgişi. (HUB!).

Distribution.

(Figure 3 ). Crataegus azarolus var. senobaaensis is endemic to southeast Turkey and it is known from two different locations.

Ecology and habitat.

Crataegus azarolus var. senobaaensis grows in dry steppes from 1250 to 1735 m elevation.

Etymology.

The epithet denotes the type locality Şenoba.

Preliminary conservation status.

Crataegus azarolus var. senobaaensis should be labelled as "Critically Endangered", (CR B1+D) according to the IUCN (2017) threat categories. The area of occupancy is estimated to be smaller than 100 km2 and the number of examined mature individuals is less than 50. Besides this, all of the examined specimens are known from habitats which are not under threat.

Figures

Figure 1. Crataegus azarolus var. senobaaensis Doenmez. A View of fruiting bush in steppe habitat B leaves of short shoot C mature fruits. (A. A. Doenmez 18745). Scale bar: 1 cm.

Figure 3. Distribution of the taxa. (square) Crataegus azarolus var. senobaaensis; (star) Crataegus monogyna var. odemisii var. nov. (circle) Crataegus yaltirikii (Near East topographic map-blank. svg).