420206a Cerastium nigrescens var. laxum (Lindblad) Brysting & Elven
Distribution
Northern Iceland: Frequent
Western Greenland: Presence uncertain
Shrub Tundra: Scattered
Bordering boreal or alpine areas: Frequent
- Brysting & Elven, Taxon 49: 212 (2000). - Cerastium latifolium var. laxum Lindblom, Physiogr. Sällsk. Tidskr. 1: 334 (1838). Lectotype (O!): Norway: Sør-Trøndelag, Oppdal, "Dovre, Kongsvold, ad Södra Nystubäck infra terminum betulinum", July 1837, leg. Lindblad (Brysting and Elven 2000: 212).
- Cerastium arcticum auct., non Lange (1880).
2n=
108 (6x). - Europe (N). - Several reports, see Brysting (2000) with references to previous reliable counts.
Not included: A report of 2n = 90 (ca. 5x) from central Norway (Knaben and Engelskjøn 1967) probably belongs to the hybrid C. alpinum x nigrescens which is frequent in the mountains (Oppdal) from where the counted plants came.
Geography: European (NW) (or amphi-Atlantic (E)?): ICE GRL?
Notes: Elven and Brysting: Cerastium nigrescens does not reach the Arctic in Scandinavia but reaches it in Iceland. Some plants from southwestern Greenland may belong to this race. The plants that reach the Arctic belong to the widespread var. laxum. The type of the species belongs to a very local Shetland serpentine plant, an ecotype accorded rank as var. nigrescens.
Higher Taxa
- Cerastium nigrescens [420206,species]