342609c Poa pratensis subsp. irrigata (Lindm.) H. Lindb.
Distribution
Northern Iceland: Frequent
Northern Fennoscandia: Scattered
Svalbard - Franz Joseph Land: Persistent (Adventive)
Hudson Bay - Labrador: Persistent (Adventive)
Western Greenland: Rare
Eastern Greenland: Rare
Mid Arctic Tundra: Persistent (Adventive)
Southern Arcti Tundra: Persistent (Adventive)
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
- H. Lindb., Pl. Finl. Exsicc. 2: 20 (1916). - Poa irrigata Lindm., Bot. Not. 1905: 88 (1905). Type: Sweden: Uppland, "Upsaliae", leg. Ehrhart. - Poa humilis Ehrh. ex Hoffm., Deutschl. Fl. 3: 45 (1800). See notes.
- Poa subcaerulea Sm. in Sowerby, Engl. Bot. 14: t. 1004 (1802). Type: England: "Anglesea (on the mountains of Westmoreland and Cumberland)", leg. H. Davies. - Poa pratensis subsp. subcaerulea (Sm.) Hiitonen, Suom. Kasvio: 205, f. 5 (1933).
2n=
38-147 (ca. 5/6x-21x). - Europe, Far East. - Several reports.
Geography: Amphi-Atlantic (E) - European (N): ICE NOR RUS CAN* GRL.
Notes: Subspecies irrigata is mainly a shore plant and native on and close to the seashores in the North Atlantic regions north to the Arctic in southern Greenland (or archaeophytic there), Iceland, and Norway. Sekretareva (1999) reported it as adventive for the Murman area. However, it is very common as native in coastal vegetation types in northeastern Norway east to the estuary of the border river Jakobselva between Norway and Russia. We therefore assume it to be native also in the Murman area but probably assigned under another name there. It occurs as adventive but established in arctic sites in northeastern Canada (at least Iqaluit in Baffin Island, Elven 1999, O) and as semi-established in Svalbard (Longyearbyen, Elven 2009-2010, O, TROM, abundant and flowering but perhaps not fruiting).
The name P. humilis Ehrh. ex Hoffm. has priority at rank of species, based on a Swedish plant ("Upsaliae", leg. Ehrhart). The name subsp. irrigata probably has priority at rank of subspecies. Lindman's P. irrigata and Hoffmann's P. humilis seem to be based on the same type.
Higher Taxa
- Poa pratensis [342609,species]