Chinese Literature Name: Gamba Bean
Latin scientific name: Koompassia excelsa
Family: Sappaceae
Genus: Campanula
Place names: Mengaris (Sabah, Sarawak - Code MGRS), Tualang (Malaysia, Indonesia i), Tapang, Kayu Raja (Sarawak), Bengaris, Wehis, Menggeris (Indonesia), Manggis (Philippines), G
Inoo, Menggis (Philippines), Yuan (Thailand), Tapang, Kayu Raja (Sarawak)
Non-standard name: Gold does not change, Nanyang steel cypress, yellow pear, Nanyang mahogany, phoenix, Kenpas
A large tree of the genus Campanulaceae, imported mainly from Malaysia and Indonesia in batches.
Trees and Distribution: Large trees, about 54 meters in height, about 1.2 meters in diameter at breast height. The common dendritic phloem of large diameter logs. There are about 4 species of this genus, which are distributed in Southeast Asia and Baxin. This kind is mainly imported from Malaysia and Indonesia in batches.
Macrostructure
Macroscopic structure: porous materials. Pipe holes are obvious, few and slightly larger under the naked eye; they are mainly single-pipe holes with a few diameter-cracked compound holes; they contain black-brown gum. Axial parenchyma is distinct and well developed under naked eyes. It is strip-like and long-agglomerated wing-like, wheelbound. Wood ray magnifier is obvious, medium density, narrow.
Cross section: Heart sapwood has obvious difference. Heart pale red to orange. It has yellowish-brown fine lines. The sapwood is light yellowish brown and often blueish. The growth rings are slightly visible.
Wood properties: lustrous, waxy texture. Deep interlacing texture; Coarse structure; Heavy and hard; High strength; Dry shrinkage. Sawing and rotary cutting are difficult to process, the planing surface is smooth, the paint and glue are not good, and the nail holding force is strong, which requires pre-drilling. Corrosion resistance. Because of its slight acidity. It is corrosive to black metals. Drying slowly, easy to crack. The air-dry density is usually greater than 0.8g/cm3.
Wood usage: It is suitable for heavy structure such as wharf, bridge timber, sleeper, dock, etc. It can also be used as ** opening floor, joinery, furniture, agricultural appliances, chemical wood, etc.
Points for recognition: Large-diameter logs have dendritic inner phloem. The bark is peeled off and there are often light red patches on the wood surface. Chord section and surface with ripple. The structure of the axial wave wall is obviously strip-like and wing-like. A small number of long convergent wing and wheel boundaries. The banded parenchyma of K. malaccensis was not obvious and its density was slightly higher. The axial parenchyma of Campanula grandiflora var. bassiana is long-winged, and the poly-winged length changes periodically.