| Erysimum altum (Ahti) Tzvelev | |
| Publ. & Syn. | Tzvelev, Bot. Zhurn. 82, 12: 94 (1997). - Erysimum cheiranthoides subsp. altum Ahti, Arch. Soc. Zool.-Bot. Fenn. Vanamo 16: 24 (1962). Holotype (H): Finland: Kuusamo, Kuusamo church village, 15. July 1913, leg. E. af Hällström. |
| Notes | Ahti (1962) and Ericsson (in comment) recognize the native northern plant as, respectively, Erysimum cheiranthoides subsp. altum or E. altum, differing from E. cheiranthoides in, e.g., being a biennial (early flowering) with remains of last year's rosette and an elongated stem with numerous, narrow leaves. Erysimum cheiranthoides is an annual (late flowering) with broader leaves and often with a short stem with fewer leaves. Erysimum altum is typical of higher latitudes and altitudes, whereas adventive plants in the same areas more often belong to E. cheiranthoides. Rollins (1993) and other have proposed E. altum to be an ecotype or developmentally different plants rather than an independent taxon. Mulligan (in comment) found no consistent difference between E. altum and E. cheiranthoides and proposed that they are not recognized as two taxa. Ericsson (in comment, Flora Nordica draft) stated that they co-occur throughout much of Fennoscandia, sometimes mixed on localities, that crossing attempts have been unsuccessful, and that no hybrids have ever been documented. They behave like two species - geographically, ecologically, reproductivelly, and as to life span - and we accept them as such. |
| Chromosomes | 16 (2x, x = 8). - Europe (N). - Ahti (1962). Perhaps also Siberia (N) and Far East (N). At least three reports for E. cheiranthoides: Yurtsev and Zhukova (1982); Berkutenko et al. (1984); Zhukova and Petrovsky (1984). |
| Geography | European (N) - Asian (N/C) - amphi-Beringian - North American (NW): RUS SIB RFE ALA CAN. |
| Distribution | N = F AN = r E = S CC = r YG = r HL = r FN = r UN = s AW = r Kh = r CW = r Tm = r KP = s [ key ] |
| Parent taxon | Erysimum L. |
| PAF ID | 671005 |