1. The practice of making wax leaf specimens with dried plant specimens (1) When collecting, it is best to obtain complete specimens, namely roots, stems, leaves, flowers and fruits. The plant is exactly 37 cm from the root to the top of the stem, which is right on the standard table paper. Smaller is not a problem at all. If it is very high, attention must be paid to the integrity of the plant when collecting. Its typical representative parts can be collected. In addition, woody plants can pick flower branches and fruit branches. A plant has special-shaped leaves, so we should take several sets for reference. At the beginning of collection, some weeds can be put into the collection box or plastic bag to make the weeds emit water to prevent the water loss of the collected plants, which is especially necessary in hot season. After the specimen is collected, it should be put into the collection box immediately to avoid water loss. When more specimens are collected, you can remove weeds. (2) Before pressing the specimen, you must first think about the size of the surface paper. Remove some branches and leaves from the collected specimens, leaving only four or five flowers. In this way, when the specimen is dried, it is not only beautiful, but also focused and complete. In addition, before pressing, the specimen must be arranged, and all parts should be spread out and laid flat, and cannot be folded up, because the specimen can't move after drying, which is called plastic surgery. After plastic surgery, put a few sheets of absorbent paper in the middle of each specimen (newspaper can be used instead), overlap the clamped specimens one by one, put them in a specimen splint, tie them tightly with a rope, and put them in a dry and ventilated environment with pressure on them. Absorbent paper must be replaced once a day to make the specimen easy to dry and avoid mildew. Compaction and rapid drying can preserve the shape and color of the specimen; It does not press tightly, dries slowly and wrinkles easily. (3) Put the dried paper specimen on the paper, nail it with thread, and label it to form the wax leaf specimen. If the collected specimens are incomplete, we often put two or three incomplete specimens together to become a complete specimen according to the actual situation of plants. If the specimen on the paper is too long, it can be folded 2-3 times when pressed. Especially for long specimens, it is best to take a section from the stem end and a section from the root and nail it on the surface paper. [2] Pulse-drying method 12g anhydrous sodium carbonate (corrosive) is dissolved in 500ml clean water, then heated, and continuously stirred with a glass rod to make it boil. Put the selected leaves into a beaker and cook for about 5 minutes, then gently push away the adhered leaves with a glass rod (gently). When even, soft and slightly transparent corrosion appears on the leaf surface, hold the petiole with a racket, gently take it out, put it in a Petri dish filled with clear water, rinse it several times, remove the lye, and then take out the leaf. Brush the mesophyll off the leaves gently with a toothbrush until the veins are exposed. Finally, put the vein specimen in the middle of absorbent paper, then flatten it with old newspaper and dry it (or dye it in various colors). 2. Preparation of plant soaking specimens [1] Green preservation method Green preservation is mainly treated with copper salt solution. The formula of the solution is: 20 parts of acetic acid saturated solution of copper acetate and 80 parts of distilled water. When preparing, the acetic acid saturated solution of copper acetate is first put into distilled water, boiled in a tinplate container, and then the material is put into it for boiling. At first, the material will turn yellow, and then gradually turn back to green. When it is similar to the original color, take it out and put it in cold water. [2] The common formula for color protection of red fruits is as follows: 2 parts of zinc chloride, 65438 parts of formalin, 0 parts of glycerol, 65438 parts of distilled water. During preparation, zinc chloride is dissolved in distilled water, then formalin and glycerol are added, fully stirred and put into storage. In the process of preparing the solution, if there is turbid precipitation, it should be filtered before use. References:

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