672111 Draba eschscholtzii Pohle ex N. Busch
Distribution
Taimyr - Severnaya Zemlya: Rare
Anabar - Onenyo: Rare
Kharaulakh: Rare
West Chukotka: Rare
East Chukotka: Rare
Mid Arctic Tundra: Presence uncertain
Southern Arcti Tundra: Rare
Shrub Tundra: Rare
Bordering boreal or alpine areas: Rare
- N. Busch, Izv. Rossijsk. Akad. Nauk, ser. 6, 15: 1636 (1918). Described from "ad fretum Senjavini et sinum St. Laurentii", East Chukotka (the Russian Far East). Types in LE.
Geography: Asian (NE): SIB RFE.
Notes: Petrovsky: On the Asian side, from where this species was described, Draba eschscholtzii is considered to be a yellow-flowered species most closely related to D. alpina and D. "pseudo-oxycarpa". Together with D. tschuktschorum and D. "pseudo-oxycarpa", it composes a special northeastern Asian mini-aggregate. Typical D. eschscholtzii is clearly different from the other representatives of the aggregate but in the eastern Chukchi Peninsula there are many intermediates to D. pilosa and D. corymbosa.
Elven: A type of D. eschscholtzii must be designated and studied before this name can be applied with confidence to any specific plant. In Alaska, Hultén (1945a) described the species as white-flowered, changed to "yellowish-white" by Hultén (1968a). The specimens annotated as D. eschscholtzii in the Stockholm herbarium (S), documenting five of the six Alaskan localities mapped by Hultén (1968a), belong to several species, none of them probably corresponding to the northeastern Asian plant. Hultén's description is a composite based on this assemblage. The non-arctic Yukon Territory plant that Hultén assigned to D. eschscholtzii has subsequently been described as a new species: D. scotteri G.A. Mulligan. The name D. eschscholtzii has not been applied in North America recently, for the good reason that no single species (or specimen) fits Hultén's composite description. Occurrence of this species in North America is therefore not confirmed. However, the illustration of D. eschscholtzii in Hultén (1968a) is based on a very characteristic plant in the Alaska Range (from where Hultén mapped most of his Alaskan occurrences under this name), distinguished by large, vividly yellow flowers on very slender pedicels, and very large and irregularly shaped fruits. These plants constitute a distinct group in the Alaskan material (ALA) but seem to be non-arctic. We do not known how they relate to the northeastern Asian D. eschscholtzii. At present, these Alaska Range plants are nameless.
Higher Taxa
- Draba [6721,genus]