670503c Arabidopsis petraea subsp. umbrosa (Turcz. ex Steud.) Elven & D.F. Murray
Distribution
Yamal - Gydan: Rare
Taimyr - Severnaya Zemlya: Rare
Kharaulakh: Frequent
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
Southern Arcti Tundra: Scattered
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
- Elven & D.F. Murray, J. Bot. Res. Inst. Texas 2: 439 (2008). - Arabis umbrosa Turcz. ex Steud., Nomencl. Bot. 2: 118 (1824). Holotype (KW): Siberia: "in sabulosis ad fl. Irkut", leg. Turczaninow. - Arabis petraea subsp. umbrosa (Turcz. ex Steud.) Tolm., Fl. Arct. URSS 7: 97 (1975). - Cardaminopsis petraea subsp. umbrosa (Turcz. ex Steud.) Peschkova, Fl. Tsentr. Sib. 1: 396 (1979).
- Arabis arenicola var. pubescens (S. Watson) Gelert, Bot. Tidsskr. 21: 290 (1898). Described from York Factory on Hudson Bay, Manitoba (Canada).
- Arabis media N. Busch, Bot. Mater. Gerb. Glavn. Bot. Sada RSFSR 3, 3-4: 11 (1922). Described from eastern Siberia. Type in LE. - Cardaminopsis media (N. Busch) O.E. Schulz in Engl. & Prantl, Nat. Pflanzenfam., ed. 2, 17b: 541 (1936).
2n=
16 (2x). - Siberia (N), Far East (N), Alaska (partly for A. lyrata subsp. kamchatica). - Numerous reports.
Geography: Asian (NE) - amphi-Beringian: SIB RFE ALA CAN.
Notes: Subspecies septentrionalis and subsp. umbrosa share most of their morphological features but are, as far as observed (herbarium, field in northern Yakutia), non-overlapping morphologically in the area of sympatry in northern Siberia. There may be a ploidy difference as the two only counts originating from within the certain range of subsp. septentrionalis are of tetraploids, whereas those from within the range of subsp. umbrosa are of diploids.
Higher Taxa
- Arabidopsis petraea [670503,species]