13), it is an amentum or catkin, hence such trees are called amentiferous; at other times it becomes succulent, bearing numerous flowers, surrounded by a sheathing bract or spathe, and then it constitutes a spadix, which may be simple, as in Arum maculatum (fig.
The dominant characteristics of the arboreous vegetation are, besides deciduous and amentiferous trees, Coniferae, especially the - more recent tribe of Abietineaepines, silver-firs, hemlocks, spruces ,~,,,1 ~ of which.
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