Orobanche mlokosiewiczii Piwow., Ó. Sánchez & Moreno Mor. (2017b: 125)

Piwowarczyk, Renata, Pedraja, Óscar Sánchez, Khutsishvili, Manana & Kharazishvili, Davit, 2023, Holoparasitic Orobanchaceae in Georgia (Caucasus): taxonomic revision, diversity, distribution, habitats and host range, Phytotaxa 604 (1), pp. 1-103 : 84

20. Orobanche mlokosiewiczii Piwow., Ó. Sánchez & Moreno Mor. (2017b: 125)

. TYPE:— GEORGIA: Mtskheta-Mtianeti distr.: Dariali Gorge, near the village of Gveleti , moist tall herbaceous vegetation near waterfalls, N.E. exposure, ca. 1700 m, 18 July 2015, R. Piwowarczyk s.n. (holotype KTC!; isotype KRA!). Fig. 58 .

General distribution: —Greater Caucasus. Georgia and Russia in Karachay-Cherkessia ( Piwowarczyk et al. 2017b, 2018c). Caucasian endemic.

Distribution:— Only one locality in the northern part, in the Greater Caucasus, in Mtskheta-Mtianeti prov. ( Fig. 59 ).

Habitat: —Thermohygrophilous subalpine tall herbaceous vegetation, near waterfalls and rocky slopes, so far 1700 m.

Hosts: — Aconitum sp. (Ranunculaceae) , here on Aconitum cymbulatum (Schmalh.) Lipsky. In its Georgian habitat there were also occurrences of Senecio propinquus , it cannot be ruled out that in such dense vegetation, it may also parasitise on it.

Phenology: —Flowering July–August, fruiting August.

Conservation status: —Critically Endangered (CR) – B 1 ab (iii) + 2 ab (iii). Only one locality is known in Georgia, in the protected area of Kazbegi National Park. Results of limiting factors are restricted EOO (less than 100 km 2) and AOO (less than 10 km 2), and degradation, including drying or landslides of habitats.

Notes: —See also comments above, in O. cicerbitae .

Specimens examined:— GEORGIA. Mtskheta-Mtianeti prov.: Dariali Gorge, near the village of Gveleti, moist tall herbaceous vegetation near waterfalls, N.E. exposure, ca. 1700 m, on Aconitum cymbulatum [roots attached] and probably not excluded Senecio propinquus , 18 July 2015, R. Piwowarczyk (KTC); RUSSIA. Caucasus, Karachay-Cherkessia, Teberdinsky Reserve, Malaya Hatipara Mt., a high grassy glade, on Aconitum [roots attached to parasite], 11 August 2006, A.S. Zernov (MW0723406) (sub O. alsatica ).

Figures

FIGURE 58. Orobanche mlokosiewiczii. A–D. General habit. E–G. Flower, side view. H–J. Flower, front view. K, M. Habitat (Mtskheta- Mtianeti prov., Dariali Gorge, near Gveleti). L. Host, Aconitum cymbulatum. Photos by R. Piwowarczyk.

FIGURE 59. Distribution of Orobanche mlokosiewiczii in Georgia.