Delphinium reverdattoanum Polozhij & Revjakina

Delphinium reverdattoanum Polozhij & Revjakina (Fig. 7 A-C) Flora of Siberia, Vol. 6.: 122, 123 (Friesen 2003). TYPE MATERIAL. — Russia • Mountain Altai, Katunsky Ridge, Tekelyu River Valley (Akkem), Upper part of the forest belt, on damp rocks; 1.VIII.1975; O. Mikhaylova s.n.; holo-, TK • Akoyuk River Valley, Lakeshore; elevation 2400 m; 28.VII.1975; E. S. Nechitayeva & O. Mikhaylova s.n.; para-, TK. PHENOLOGY. — Flowering and fruiting from July to September. ETYMOLOGY. — This specific epithet is named after the Russian botanist Viktor Vladimirovich Reverdatto (1891-1969), head of the biology department at the University of Tomsk. DISTRIBUTION AND HABITAT. — South-west of Siberia; new record for Mongolia, occurring in Bayan-ulgii province. It grows on the cliffs of the subalpine belt (Friesen 2003). ADDITIONAL SPECIMENS EXAMINED. — Mongolia • Bayan-ulgii, Altai Mt., stony hillside scrub; 24.VII.2017; L.Q. Zhao et al. M17-7085; HIMC[HIMC00148001]! TAXONOMIC NOTES Delphinium reverdattoanum and D. barlykense Lomon. & Khanm. are morphologically similar. However, they can be distinguished by the characteristics of stem hairiness, ovary and follicle texture, and staminode limb morphology. Delphinium reverdattoanum features stems that are pubescent with a mix of simple and glandular hairs, glabrous ovaries and follicles, and a deeply emarginate staminode limb. In contrast, D. barlykense has glabrous stems, pilose ovaries and follicles, and a staminode limb that is crenate or shallowly emarginate at the tip (Friesen 2003).