1. Manglietia species all have scalariform perforation plates, only a few also have simple perforations.

2. In contrast, most of the Michelia species possess scalariform perforation plates and only one with simple perforation.

3. Results There were 3 types of vessel elements, scalariform vessel, reticulated vessel and pitted vessel, the perforation plates were simple perforation plate.

4. The form of the perforation plates in the typical vessels are various, divide into several subtypes:scalariform perforation plates, reticulate perforation plates.

5. There were two types of vessel perforation plates, simple perforation one and scalariform plant.

6. After that, the thesis will introduce an improved EZW algorithm based on scalariform quantization.

7. Most of them have simple perforation and only a few scalariform perforation plates.