Flowers and Flower-Gardens / With an Appendix of Practical Instructions and Useful Information Respecting the Anglo-Indian Flower-Garden

by David Lester Richardson

PASTILLES DU SERAIL.--Sold in France as Turkish, in rosaries and other ornaments, are made of the petals of the Belgian or Puteem Rose, ground to powder and formed into a paste by means of liquid gum.

Ivory-black is mixed with the gum to produce a black colour; and cinnabar or vermilion, to render the paste either brown or red.

It may be modelled by hand or in a mould, and when dried in the sun, or a moderate oven, attains sufficient hardness to be mounted in gold or silver.--Mrs. Gore's Rose Fancier's Manual.

OF FORMING AND PRESERVING HERBARIUMS.--The most exact descriptions, accompanied with the most perfect figures, leave still something to be desired by him who wishes to know completely a natural being. This nothing can supply but the autopsy or view of the object itself. Hence the advantage of being able to see plants at pleasure, by forming dried collections of them, in what are called herbariums.

A good practical botanist, Sir J.E. Smith observes, must be educated among the wild scenes of nature, while a finished theoretical one requires the additional assistance of gardens and books, to which must be superadded the frequent use of a good herbarium. When plants are well dried, the original forms and positions of even their minutest parts, though not their colours, may at any time be restored by immersion in hot water. By this means the productions of the most distant and various countries, such as no garden could possibly supply, are brought together at once under our eyes, at any season of the year. If these be assisted with drawings and descriptions, nothing less than an actual survey of the whole vegetable world in a state of nature, could excel such a store of information.

With regard to the mode or state in which plants are preserved, desiccation, accompanied by pressing, is the most generally used. Some persons, Sir J.E. Smith observes, recommend the preservation of specimens in weak spirits of wine, and this mode is by far the most eligible for such as are very juicy: but it totally destroys their colours, and often renders their parts less fit for examination than by the process of drying. It is, besides, incommodious for frequent study, and a very expensive and bulky way of making an herbarium.

The greater part of plants dry with facility between the leaves of books, or other paper, the smoother the better. If there be plenty of paper, they often dry best without shifting; but if the specimens are crowded, they must be taken out frequently, and the paper dried before they are replaced. The great point to be attended to is, that the process should meet with no check. Several vegetables are so tenacious of their vital principle, that they will grow between papers; the consequence of which is, a destruction of their proper habit and colors. It is necessary to destroy the life of such, either by immersion in boiling water or by the application of a hot iron, such as is used for linen, after which they are easily dried. The practice of applying such an iron, as some persons do, with great labor and perseverance, till the plants are quite dry, and all their parts incorporated into a smooth flat mass is not approved of. This renders them unfit for subsequent examination, and destroys their natural habit, the most important thing to be preserved. Even in spreading plants between papers, we should refrain from that practice and artificial disposition of their branches, leaves, and other parts, which takes away from their natural aspect, except for the purpose of displaying the internal parts of some one or two of their flowers, for ready observation. The most approved method of pressing is by a box or frame, with a bottom of cloth or leather, like a square sieve. In this, coarse sand or small shot may be placed; in any quantity very little pressing is required in drying specimens; what is found necessary should be applied equally to every part of the bundle under the operation.

Hot-pressing, by means of steel net-work heated, and placed in alternate layers with the papers, in the manner of hot pressing paper, and the whole covered with the equalizing press, above described, would probably be an improvement, but we have not heard of its being tried. At all events, pressing by screw presses, or weighty non-elastic bodies, must be avoided, as tending to bruise the stalks and other protuberant parts of plants.

"After all we can do," Sir J.E. Smith observes, "plants dry very variously. The blue colours of their flowers generally fade, nor are reds always permanent. Yellows are much more so, but very few white flowers retain their natural aspect. The snowdrop and parnassia, if well dried, continue white. Some greens are much more permanent than others; for there are some natural families whose leaves, as well as flowers, turn almost black by drying, as melampyrum, bartsia, and their allies, several willows, and most of the orchideae. The heaths and firs in general cast off their leaves between papers, which appears to be an effort of the living principle, for it is prevented by immersion of the fresh specimen in boiling water."

The specimens being dried, are sometimes kept loose between leaves of paper; at other times wholly gummed or glued to paper, but most generally attached by one or more transverse slips of paper, glued on one end and pinned at the other, so that such specimens can readily be taken out, examined, and replaced. On account of the aptitude of the leaves and other parts of dried plants to drop off, many glue them entirely, and such seems to be the method adopted by Linnaeus, and recommended by Sir J.E. Smith. "Dried specimens," the professor observes, "are best preserved by being fastened, with weak carpenter's glue, to paper, so that they may be turned over without damage. Thick and heavy stalks require the additional support of a few transverse strips of paper, to bind them more firmly down. A half sheet, of a convenient folio size, should be allotted to each species, and all the species of a genus may be placed in one or more whole sheets or folios. On the latter outside should be written the name of the genus, while the name of every species, with its place of growth, time of gathering, the finder's name, or any other concise piece of information, may be inscribed on its appropriate paper. This is the plan of the Linnaean herbarium."--Loudon.