Holoparasitic Orobanchaceae in Georgia (Caucasus): taxonomic revision, diversity, distribution, habitats and host range Author Piwowarczyk, Renata 0000-0003-0507-7835 * Center for Research and Conservation of Biodiversity, Institute of Biology, Jan Kochanowski University, 7 Uniwersytecka St., 25 - 406 Kielce, Poland; renata. piwowarczyk @ ujk. edu. pl; renka 76 @ wp. pl; https: // orcid. org / 0000 - 0003 - 0507 - 7835 renata.piwowarczyk@ujk.edu.pl Author Pedraja, Óscar Sánchez 0000-0002-4383-4588 E- 39722 Liérganes (Cantabria), Spain; osanchez @ farmalierganes. com; https: // orcid. org / 0000 - 0002 - 4383 - 4588 osanchez@farmalierganes.com Author Khutsishvili, Manana 0000-0002-7404-9574 National Herbarium of Georgia, Institute of Botany, Ilia State University, Tbilisi, Georgia; mananakhuts @ yahoo. com; https: // orcid. org / 0000 - 0002 - 7404 - 9574 mananakhuts@yahoo.com Author Kharazishvili, Davit 0000-0003-0507-7835 * Center for Research and Conservation of Biodiversity, Institute of Biology, Jan Kochanowski University, 7 Uniwersytecka St., 25 - 406 Kielce, Poland; renata. piwowarczyk @ ujk. edu. pl; renka 76 @ wp. pl; https: // orcid. org / 0000 - 0003 - 0507 - 7835 & Batumi Botanical Garden, 6411, Batumi, Mtsvane Kontskhi, Georgia; davit. kharazishvili @ gmail. com; https: // orcid. org / 0000 - 0001 - 9254 - 9954 * author for correspondence & * Center for Research and Conservation of Biodiversity, Institute of Biology, Jan Kochanowski University, 7 Uniwersytecka St., 25 - 406 Kielce, Poland; renata. piwowarczyk @ ujk. edu. pl; renka 76 @ wp. pl; https: // orcid. org / 0000 - 0003 - 0507 - 7835 renata.piwowarczyk@ujk.edu.pl text Phytotaxa 2023 2023-07-24 604 1 1 103 http://dx.doi.org/10.11646/phytotaxa.604.1.1 journal article 10.11646/phytotaxa.604.1.1 1179-3163 8181674 2. Phelipanche caesia (Rchb.) Soják (1972: 129) . Type:— RUSSIA ( holotype , Piwowarczyk et al . 2019: 24 ): Sarepta [Old Sarepta / Krasnoarmeysky (now part of Volgograd , Volgograd Oblast )], Burkhard (W). Basionym:— Orobanche caesia Reichenbach (1829: 48) . Homotypic synonyms:— Phelypaea caesia (Rchb.) Grisebach (1844: 59) . Heterotypic synonyms:— Phelypaea lanuginosa C.A. Mey. in Ledebour (1830: 460) ; Orobanche borealis Turcz. ex Karelin & Kirilow (1841: 722) . General distribution: —Central Europe (SE part) to Siberia, the Caucasus (incl. Artvin , Turkey ) and Central Asia. Distribution: — In Georgia and the entire western part of Transcaucasia, which seems to be its southern limit of distribution range, which requires confirmation. Poorly gathered specimens referring to this species are from Mtskheta-Mtianeti / Tbilisi province ( Fig. 9 ). FIGURE 9. Distribution of Phelipanche caesia in Georgia. Habitat: —In Mtskheta collected from steppes, dry hills, sandy and rocky slopes; this area is located at 500–800 m , an in Mtskheta it was collected at ca. 700 m . Hosts: —In the general distribution on Artemisia sp. ( Asteraceae ), herbarium sheet from Mtskheta included A. caucasica Willd. [ A. alpina Willd. ]. Phenology: —Flowering (May) June to July, fruiting July to August. Conservation status: —Data Deficient (DD). The species in Georgia requires confirmation. Taxonomic Notes: —See Piwowarczyk et al. (2019) . Specimens examined: — GEORGIA . Mtskheta-Mtianeti / Tbilisi prov. : Tiflis, s.d ., Ja.S. Miedviediev (TBI ( Beck 1930: 99 )); near Tbilisi, Mtskheta, on Artemisia caucasica [attached], 700 m , 4 June 1949 , I. Svietnikova (LE). TURKEY . Artvin prov. : upper Coruh-valley [Ch’orokhi / Chorokhi] above Demirkent, on spiny Astragalus [between Astragalus , but on Artemisia sp. ], 7 July 2011 , Birgit & J¸rgen Ĝckeritz [phot.! in OroWiki, as P. cf. serratocalyx ].