By Skvortsov A.K.
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Extra info for Willows of Russia and Adjacent Countries. Taxonomical and Geographical Revision
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However, the terminal bud dies off during subsequent years, and the shoot starts to grow sympodially. 1 The willows do not have real spurs (brachyblasts), although spurs are very pronounced, for example, in the balsam poplars. 1 R. Scharfetter (1953: 86) mistakenly considered terminal buds to be persistent in mature specimens of some tropical willows. He also considered the sympodial growth in the willows to be induced: caused by migration of the willows to regions with the temperate climate. This assumption does not have any proof.
6. ), Jul. 1959. —7. The Abava R. Valley between Kandava and Sabile (Western Latvia), Jul. 1959. —8. The Zapadnaya Dvina R. Valley between Plyavin and Koknese and surrounding watershed areas, Jul. 1959 (P). —9. Kurshskaya Kosa around Nida, Jul. 1961 (P). — 10. ), Jul. 1960 (P). — 11. Slobodskoy and Demidovskiy distr. ), Jul. 1962. —12. The Dnieper R. Valley near Yartsevo (east of Smolensk), Jul. 1958 (P). — 13. The southern Smolensk Obl. 1957 (P). — 14. Znamenskiy Distr. ), Jul. 1958 (P). —15.
Fragilis, S. capusii, and others), one can often observe gradual transition from normally developed leaves to bracts along the rachis. In the section Vetrix, one can find ear-shaped outgrowths at the base of the lowermost bracts: apparently, these correspond to stipules in normal leaves. In case a catkin proliferates, bracts develop back into leaves. Therefore, any attempts to treat bracts as a part of the flower axis (Fisher 1928) seem very unnatural and cannot be accepted. This was actually demonstrated by Hjelmquist as early as 1948 (Hjelmquist 1948).