| Phleum pratense L. | |
| Publ. & Syn. | Phleum nodosum L., Syst. Nat., ed. 10, 2: 871 (1759). Described from central Europe. Lectotype (LINN): Herb. Linn. 81.2 (Dogan in Cafferty et al. 2000: 254). - Phleum pratense subsp. nodosum (L.) Arcang., Comp. Fl. Ital.: 757 (1882). |
| Notes | Phleum pratense subsp. pratense is cultivated into the Arctic and sometimes escapes. Even if numerous chromosome numbers and ploidy levels are reported for Phleum pratense, the most widely distributed number and level for subsp. pratense is 2n = 42 (6x). It is proposed to be a case of autoploidy from the assumedly diploid, non-arctic subsp. bertolonii (DC.) Bornm. (see, e.g., Wilton and Klebesadel 1973, based on a comparison of karyotypes). There are some problems in correct naming of the diploids and tetraploids but that does not influence the arctic treatment. See Conert's (1998) summary of discussions concerning the races of P. pratense. |
| Chromosomes | (1) 28 (4x). - Europe, Caucasus. - Two reports. Tetraploid in FCM, numerous populations, Fjellheim et al. (unpubl.) (2) 42 (6x). - Europe, Siberia, Far East, Alaska, Canada. - Numerous reports. Hexaploid in FCM, numerous populations, Fjellheim et al. (unpubl.) There are 1-3 old reports for each of the numbers of 2n = 21 (3x), 35 (5x), 49 (7x), 56 (8x), 63 (9x), 70 (10x), and 84 (12x), all from Europe. |
| Geography | European - Asian (W): ICE* NOR* RUS* ALA* CAN* GRL*. |
| Distribution | N = * C = ** GW = * D = ** Ic = * E = * HL = * FN = * UN = ** AW = * SF = ** KP = * [ key ] |
| Parent taxon | Phleum L. |
| PAF ID | 344102 |