According to botanical point of view, oudh trees can be divided into several familia and genus. From it’s familia the agarwood or oudh trees were divided into 3 kinds of familia the first is the Thymeleaceae. This familia had several genus the first is Aetoxylon, the second is Aquillaria, the third is Enklenia, the fourth is Gonystylus, the fifth is Wikstroemia (use to be found in Java, now extinct because exessive hunting during the Dutch colonial era.)the sixth is Grynops.
The second familia is Leguminosae it only had one genus Dalbergia, The last familia is Euphorbiacae it also had only one genus that is Excoecaria.
Now we shall discuss about species, Aetoxylon only had one species that able to produce agarwood resin that is Aetoxylon Sympetalum also known as kayu bidurob, laka, garu buaya and pelabayan. A.Sympetalum has average high of 15 M or 49.212 ft with 25-27 cm in diamater. It has egg shapped leaf, it grows in sandy low land forest with average rain rate per year is about 1400 mm/year.
As for Aquilaria genus it has the riches and the best species that can produce agarwood resin. It has several species the first is Aquilaria Beccariana, secondly Aquilaria Microcarpa this tree is able to grow 35 M or 114.82 ft in high and 70 cm in it’s diameter, The third is the queen of Indonesian oudh Aquillaria Malacenensis LAMK this tree can grow about 40 M or 131.23 ft in high (as tall as cellphone tower!) with it’s diameter 80 cm. This tree is the best producer of agarwood resin and oil in Indonesia.The fourth is Aquilaria Fillaria it is only grow to the average high of 15-18 M and the trunk diameter is only 50 cm. this tree is natively to eastern part on Indonesia such Moluccas and Papua. In Papua this tree call as Age and in Moluccas known as Las. The fifth is Aquilaria Cumingiani.
The third genus is Gonystylus. It had 2 species G.bancanus and G.macrophyllus This plant is a huge one. It can reach 45 M in hight and it’s diameter ranged from 30-120 cm (almost as large as a dinning table.) this tree live in the bogs or wetlands. It produce ball resin. The ball resin formed because an infection hit the ex branches growing area. It grows in Sumatera and Kalimantan (borneo)
The fourth genus is Enkleia. Enkleia is a liana plant wich means it’s a climber plant (it climb up to another plant trunk’s or any other things to gain sunlight). This plant lenght can reach 30 M and the trunk diameter is only 10 cm. It has red colored trunk with branches and also a hook that use for climbing.
The fifth genus is WikstroemiaThis plant is a bush plant. It can reach 7 M in high it’s branches diameter it’s only 7.5 cm. The branches where red or brownnish colored. In Indonesia there are 3 species of Wikstoemia, Wisktroemia androsalmofolia Decne found in Java, Kalimantan, Sulawesi, East Nusa Tenggara and Papua. The second Wikstroemia polyantha Merr found all over Indonesia and the third is Wikstroemia Miq found in Sumatera and Kalimantan.
The sixth genus from Thylemeceae is Grynops it has 2 species Grynops verstegii found in Nusa Tenggara, Sulawesi , Moluccas and Papua the second species Grynops cumingiani this plant found in Sumatra.
Now we shall discuss the second family the Legumiosae, this Family only had one genus and one species that can produce agarwood resin. Dalbergia parvifolia from the genus of Dalbergia found in Sumatera and Kalimantan. This plant is a liana plant.
The last Family is Euphorbiaceae. From this family we found one genus Excoeccaria, the only species that can produce agarwood resin is Excoeccaria Agalocha. This tree live in the mangrove area. It can reach 10-20 M and it’s trunk diameter can reach 40 cm.
(by agarwoodIndonesia.com)
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