For details and discussion, see G. Knaben (1958); A. Löve (1962b, 1962c); and G. Knaben and N. Hylander (1970). Knaben, G. 1958. Papaver-studier, med et
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Verbatim text: Knaben, G. 1959. On the evolution of the radicatum-group of the Scapiflora Papavers as studied in 70 and 56 chromosome species. Part A.
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base abruptly expanded. The chromosome number (2n = 42) attributed to G. Knaben (1959) by U. Rändel (1977) cannot be confirmed. Phenology: Flowering Jun–Aug
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We recognize Papaver lapponicum in a much narrower sense than did G. Knaben (1959). Much further study is needed to assess the relationships of North American
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brown. The report of 2n = 84 (as P. cornwallisensis) attributed to G. Knaben (1959) by A. Löve (1962b) cannot be confirmed. Phenology: Flowering Jun–Jul
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K Knaben1958a K cont. Knaben1959a K cont. Knaben1970a
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