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Other good Alpine Saxifrages suitable
for various positions are Moschata, Bryoides and
Squarrosa.
In the arrangement of garden
pictures, flower masses must be relieved by the introduction
of foliage plants. Fortunately the Alps are by no means lacking in suitable
flora for this purpose. Many ferns and small native shrubs
are available.
The cool, deep green of the
Spleenwort Ferns affords a happy contrast to the rich blues
and dead whites of Gentian and Saxifrage. Two good kinds are
Asplenium Germanicum and A.selosii. The Shield Ferns
(Aspidium), which include also the Polystichum, many of them
perfectly hardy, requiring abundant water during the hot
weather. Montanum is a true Swiss variety.
Between low masses of rock, small
clumps of Woodsia look beautiful, especially when the stones
are mantled with Sedums and vivid mosses. A slightly peaty
soil suits them best, and they require plenty of water.
W.hyperborea and W.ilvensis are especially
suitable.
In shady corners where the drainage
is perfect the Bladder Ferns (Cystopteris) soon make
themselves at home. C.alpina, one of the smallest, is also
one of the best. Lomaria Spicant and the hardy Cheilanthes
are other precious ferns for the garden of Alpines.
Though none will deny the beauty and
diversity of the plant families which make the Swiss
pastures and lower Alps veritable gardens of Nature, yet the
true charm of Alpine flowers is only felt when we ascend to
the region of ice and snow. Here at last we realise the
powerful grace that lies in herbs. Who
is
not moved when amidst the savagery of Nature, the chaos of
rock and dreary waste of snow, a tiny plant springs forth
and bravely fights for life.
The
smaller varieties of Androsace and Saxifrage, which thrive
in the grit filled clefts beside mountain glaciers, often
fail altogether in garden soil. It is ridiculous to speak of
such plants as "delicate" Alpines, or to infer that our
climate is unsuited to their needs.
As
a matter of fact, the soil in most Alpine gardens is far too
rich, and these plants from the highest regions die from
over-nutrition. The earth chinks should be filled with the
poorest gravel soil, and with full exposure to sun and free
drainage the majority will do well.
In
town gardens Androsaces are difficult to grow, as their
small green leaves soon become coated with soot and dust.
They are diminutive plants of the Primrose order, and in
their native Alps
flower
directly the snow has melted. Small fissures in the upper
part of the Alpine garden should be prepared for their
reception, a mixture of gritty loam and sand, with a small
proportion of peat, being packed into the
crevices.
The
plants will never thrive on shallow ledges, the roots should
strike downwards for at least a foot. During summer drought
the small fibres will wrap themselves around stones and rock
fragments, finding abundant moisture in the cool
depths.
In
the granite regions of the higher Alps
the
following Androsaces are found:
A.glacialis,
A.carnea, and A.vitaliana, the two former rosy, the latter
yellow.
Chalk loving kinds are:
A.chamaejasme,
pink; A.helvetica, white; A.pubescens, white with yellow
eye; and A.villosa, pink.
A
group of dwarf Campanulas, comprising C.allioni, Cenisia and
Excisa, will swell the list of miniature plants. C.allioni
forms a close network of succulent roots, the stemless blue
flowers being raised on small rosettes of leaves. It is
found on granite soil. C.cenisia (Mont Cenis Harebell) is
another free rooting kind, with blue flowers and bright leaf
rosettes. These Campanulas do well on perpendicular rock
faces, clothing the joints with exquisite flower and leaf
clusters.
A
tiny Saxifrage, S.caesia, almost like a silvery moss, is
another native of the high Alps
.
It requires a sandy soil, and must not be allowed to suffer
from dryness during the summer. The Cobweb Houseleeks
(Sempervivum) demand full exposure to sun. In flat spaces
among the small Alpines their quaint silver leaf rosettes
and pink flowers are very distinct. To combine with these
there are many other families of plants, the Primulas and
Gentians, Artemisia and Achillea.
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