There is no difference between the two. Dendrobium is also called Dendrobium miltiorrhizum.

Mi Dendrobium is the abbreviation of Huoshan Dendrobium, and it is also the unique variety in Huoshan County, which is the best of the dendrobium. Dendrobium, also known as the dragon's head and phoenix tail, produced in the hinterland of Dabie Mountain Huoshan County, Taiping Fanxiang deep mountains, the production of scarce, often growing in the deep mountain cliffs.

Dendrobium (Dendrobium) stem erect, fleshy fat, slightly compressed cylindrical, 10~60 centimeters long, up to 1.3 centimeters thick, more or less reflexive bending at the upper part, the base is obviously narrowed, unbranched, with many nodes, nodes sometimes slightly swollen; more or less inverted conical internode, 2~4 centimeters long, golden yellow after drying. Leaves leathery, oblong, 6-11 centimeters long, 1-3 centimeters wide, apex obtuse and unequally 2-lobed laterally, base with clasping sheaths.

Expanded Information:

Dendrobium (Dendrobium) p>Introduction of Dendrobium (Dendrobium):

Dendrobium (Dendrobium) belongs to the unevolved aerial orchid family, and its growing conditions are extremely harsh. It grows in a cool, moist and ventilated environment at an altitude of 300 to 900 meters above sea level in the protected area. Mostly born in the river streams, ditches and streams on the cliffs beside the valleys, often with mosses, stone reeds and other plants epiphytic together. Prefer cool, moist, ventilated foggy microclimate.

In the temperature of 14 ℃ began to grow, the temperature of 20-26 ℃, air humidity in more than 80% of the most suitable; such as temperature above 30 ℃, relative humidity below 20%, the leaf veins turn yellow, leaf drooping, stem is now crumpled; such as the cliff crevice seepage of water is too much is prone to rotting the roots to death.

Petals ovate-oblong, usually 12-15 millimeters long, 6-7 millimeters wide, apex obtuse, with 5 veins; labellum nearly rhombic, length and width about equal, 1-1.5 centimeters, base cuneate and with a callus, the upper part is slightly 3-lobed, densely short hairs between the two sides of the lobes, near the base of the dense growth of white hairs.

Baidu Encyclopedia - Dendrobium (Dendrobium huoshanense)

Baidu Encyclopedia - Dendrobium huoshanense

Baidu Encyclopedia - Dendrobium (Dendrobium orchidum)