The type specimens in Eugen von Halácsy´s Herbarium Graecum Reich, Dieter Gutermann, Walter Bardy, Katharina Rainer, Heimo Raus, Thomas Sonnleitner, Michaela Tan, Kit Lachmayer, Margarita Phytotaxa 2021 2021-03-29 493 1 1 156 Z82L Boiss., Diagn. Boiss., Diagn. [136,552,1715,1742] Magnoliopsida Rosaceae Crataegus Plantae Rosales 104 105 Tracheophyta species heldreichii    Isolectotype:—[ Greece] Inregione abietina m. Parnethis Atticae, 3500–4000’:  May 1854, T. H. H.  von Heldreich113 ( WU 0076482).   Lectotypein W( W 0102337) designated by Christensen (1992: 49).    Crataegus monogynavar. halacsyHayek, Repert. Spec. Nov.Regni Veg. Beih. 30 1 (5–6): 756. 1926,, nom. nov.pro:  Crataegus cuneataHalácsy. Current name:  Crataegus monogyna  Isolectotype and syntype:—[ Greece] Laconia: in districtu Alagonia Taygetiborealis, prope Megali Anastasova:  April 1900(flor.) &   27 August 1900(fruct.), K. H. Zahn s.n. [Herb. Graec. Norm. 1628] ( WU 0080221), syntypefor  Crataegus cuneataHalácsy(quod vide in Catalogue A).   Lectotypein W( W 1901-0004605) designated by Christensen (1992: 106). The lectotypein Wwas collected on  27 August 1900and thus corresponds to the fruiting specimen mounted on the left side of the voucher in the WU- Halácsy-Graec. collection. The flowering specimen collected in  April 1900mounted on the right side of this voucher accordingly belongs to a different gathering (though with the same collecting number) and thus has to be considered a syntype. [189,1280,1787,1815] 1854-05 T, H Greece Parnethis Atticae Isolectotype In 104 105 1 WU von Heldreich Greece 104 105 WU 0076482 1 [189,952,1860,1887] W 104 105 W 0102337 1 lectotype [189,1448,2039,2067] Greece Megali Anastasova Laconia Alagonia Taygeti 104 105 1 syntype [369,699,158,185] 1900-08-27 K, H 105 106 1 [711,1411,158,185] WU 105 106 WU 0080221 1 syntype 1900-04 1900-08-27 1900-04 W 105 106 W 1901-0004605 3 lectotype