These observations have value, but cannot be considered as
seriously impairing the multiplied evidences of plant adaptation to
insect life.
Mr. Camus has shown that the flora of a small group of hills, the
Euganean Mountains, west of the Apennines and south of the Alps, has a
peculiar flora, forming an island in the midst of a contrasted flora
existing about it. Here are found Alpine, maritime, and exotic plants
associated in a common isolation.--_Revue Scientifique_.
* * * * *
RECENT BOTANICAL ADVANCES.
Among the most significant of the recent discoveries in botany, is that
respecting the continuity of the protoplasm from cell to cell, by means
of delicate threads which traverse channels through the cell walls. It
had long been known, that in the "sieve" tissues of higher plants there
was such continuity through the "sieve plates," which imperfectly
separated the contiguous cells. This may be readily seen by making
longitudinal sections of a fibro-vascular bundle of a pumpkin stem,
staining with iodine, and contracting the protoplasm by alcohol.
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