Table 4.

Comparison of microscopic features of Dendrobium aphyllum.

Sample No.	Cuticle	Epidermis	Fiber		Vascular bundles			Raphide
	Thickness	Diameter	Number	Diameter	Number	Diameter		Length
						Tangential	Radial
SC-1	9–14	17–37	11–36	8–25	56–67–84	84–174	82–251	93–115
SC-2	14–16	13–30	20–47	5–33	64–72–85	88–127	99–281	65–182
SC-3	10–12	19–38	8–22	7–20	53–66–79	73–166	81–207	143–202
Total	9–16	13–38	8–47	5–33	53–85	73–174	81–281	65–202