. Report of the Canadian Arctic Expedition 1913-18. Scientific expeditions. 32 B Canadian Arctic Expedition, 1913rl8 An older specimen (Fig. 2) from Norrbotten, Sweden, shows the typical structure of the mature plant. The posterior part of the main rhizome is shown by R; it bears a green leaf (L^) and is terminated by a flower of which only the basal portion of the peduncle has been shown (S.); in the axil of leaf L^ is a hori- zontal shoot (St.) of which the first leaf is green (L^) and of the same size a,nd shape as leaf L^ The horizontal shoot (St.) bears at the apex a young leaf which unfo
. Report of the Canadian Arctic Expedition 1913-18. Scientific expeditions. 32 B Canadian Arctic Expedition, 1913rl8 An older specimen (Fig. 2) from Norrbotten, Sweden, shows the typical structure of the mature plant. The posterior part of the main rhizome is shown by R; it bears a green leaf (L^) and is terminated by a flower of which only the basal portion of the peduncle has been shown (S.); in the axil of leaf L^ is a hori- zontal shoot (St.) of which the first leaf is green (L^) and of the same size a,nd shape as leaf L^ The horizontal shoot (St.) bears at the apex a young leaf which unfolds in the succeeding season. In this way the axillary, horizontal stem or stolon (St.) will continue its growth in the same direction as the main rhizome (R.). In old specimens it thus appears as if the entire horizontally creeping rhizome were an axis of the same order but, as shown above, it actually consists of several axes and represents a sympodium. Several deviations from this structure occur, as is also the case in Anemone Richardsonii. For instance, as shown in Fig. 3, a stolon may be developed from the axil of the second leaf (L^) beside from the leaf (L^) borne upon the floral peduncle (S.). But otherwise the ramification is the same because the flowering stem f S.) terminates the rhizome (R.) while the stolon (St.) is developed from the axil of the first leaf (L^), bearing a green leaf (L^) which again subtends a stolon. This specimen thus shows three stolons, all being axillary. No scale- like leaves were observed in any part of these rhizomes. Ranunculus lapponicus grows in moist ground, principally in bogs, and the internodes of the rhizome may reach a length of 10 cm. or even more; the specimens from Coronation gulf were rather low, the flowering stem reaching a height of only 8 cm., while specimens from Sweden may average double the size, or more, when in fruit. R. nivalis L. and R. sulphureus Soland. exhibit the same growth and, sometimes, it has proved diffic
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1919
