667 THE STEM. are termed (< aerial " stems to distinguish them from the earthy and subter- «-anean. The aerial roots of ivy are only used for support, and are not its … Fig. 754. — Transverse section \wood,' Showing the ment through the branches and leaves. We shall growth of nine years. _ t find two forms of stem — the underground, or root- stock, and the stem proper. There are in these two former several varieties as under : — 1. The BULB, which is a short…
Scientific recreations
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