670503 Arabidopsis petraea (L.) V.I. Dorof.
Northern Iceland: Frequent
Polar Ural - Novaya Zemlya: Frequent
Yamal - Gydan: Scattered
Taimyr - Severnaya Zemlya: Frequent
Anabar - Onenyo: Scattered
Yana - Kolyma: Presence uncertain
West Chukotka: Scattered
Wrangel Island: Presence uncertain
South Chukotka: Presence uncertain
East Chukotka: Scattered
Western Alaska: Rare
Northern Alaska - Yukon: Scattered
Northern arctic Tundra: Rare
Mid Arctic Tundra: Frequent
Southern Arcti Tundra: Frequent
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
- V.I. Dorof., Turczaninowia 5, 3: 35 (2002). - Cardamine petraea L., Sp. Pl.: 654 (1753). Described from Europe: "Habitat in Angliæ, Arvoniæ, Merviniæ, Sueciæ ...". Lectotype (LINN): Herb. Linn. 835.5 (Marhold 1996: 122). - Arabis petraea (L.) Lam., Encycl. 1: 221 (1783). - Cardaminopsis petraea (L.) Hiitonen in Hyl., Förteckn. Skand. Växt., ed. 3: 62 (1941). - Arabidopsis lyrata subsp. petraea (L.) O'Kane & Al-Shehbaz, Novon 7: 326 (1997).
(1) 16 (2x) and (2) 32 (4x). - See subspecies below.
Geography: European (N/C) - Asian (N/C) - amphi-Beringian.
Notes: The combination Arabidopsis petraea (L.) Kolnik & Marhold, Willdenowia 33: 70 (2003) is superfluous.
Elven and Murray: O'Kane and Al-Shehbaz (1997) assigned Arabidopsis petraea as a subspecies of A. lyrata (see also A. kamchatica above). Tolmachev (1975c) considered the arctic Russian material as two subspecies of A. petraea. Doronkin (1994) accepted only a collective A. petraea and reported a much more narrow range than other authors (one 'dot' in Taimyr, along the Lena River, and just into the Yana-Kolyma region east of Tiksi Bay). We have looked at herbarium material of the three proposed taxa - "petraea", "septentrionalis", "umbrosa" - and have also studied all three in the field in Europe, Siberia, Alaska, and the Yukon Territory. These three are allopatric to parapatric with "umbrosa" in northwestern North America and northern-northeastern Asia (slightly overlapping with the next), "septentrionalis" in northern Asia and northeastern Europe, and "petraea" in northwestern and central Europe. There are other, non-arctic taxa in the group. We feel able to recognize the arctic taxa on the morphological criteria reported by Russian authors and we have not seen transitional forms. They differ in a few morphological characters from A. lyrata and A. kamchatica and intermediates are not seen there either. From morphological evidence, the choice is probably between three species or three allopatric to parapatric subspecies of A. petraea. We do therefore not yet agree with the proposed reduction of these three to one subspecies of A. lyrata, as proposed by O'Kane and Al-Shehbaz (1997). Pending a combined molecular and morphological investigation of the entire aggregate, and application of molecular markers that can resolve specific-subspecific variation in recently evolved taxa, we propose to treat them as three subspecies (this was supported by Yurtsev).
There are other opinions. Some authors have included the North Atlantic and European taxa in an extended Arabidopsis petraea and the Asian and North American ones in an extended Arabis arenicola. We do not support that view and consider Arabidopsis arenicola different, even if it is close to A. lyrata in ITS markers (Warwick et al. 2006).