630623 Oxytropis tichomirovii Jurtz.
Distribution
Taimyr - Severnaya Zemlya: Rare
Mid Arctic Tundra: Rare
Southern Arcti Tundra: Rare
- Jurtz., Fl. Arct. URSS 9, 2: 128, 180 (1986). Holotype (LE): Siberia: Taimyr, "districtus Avamensis, regio ripae dextrae fl. Volczja adjacens", 10. July 1964, leg. G. Lebedeva.
2n=
16 (2x). - Siberia (Taimyr). - Zhukova (1983).
Geography: Asian (N): SIB.
Notes: Yurtsev: This red/blue-flowered plant combines characters of Oxytropis arctica and O. nigrescens, probably a hybrid species.
Elven: Even if the range of O. tichomirovii is within the overlap of those of O. arctica subsp. taimyrensis and O. nigrescens s. str., we doubt the hypothesis that this species, reported with a diploid chromosome number, can be a stabilized hybrid species from another diploid (O. nigrescens) and an octoploid (O. arctica subsp. taimyrensis).
Yurtsev: Discrepancy between an intermediate morphology and diploid chromosome number demands to continue karyo-systematic examination of this taxon and its presumed parent. A hypothesis of evolution from O. nigrescens towards Orobia type should be tested also. But the merging O. tichomirovii with O. nigrescens cannot be accepted on morphological grounds: there are significant differences from the O. nigrescens aggregate.
Higher Taxa
- Oxytropis [6306,genus]