Althaea is the genus. There are between 6 and 10 species in the genus Althaea. One species is Althaea syriacus, Rose of Sharon. The medicinal, and culinary species is Althaea officinalis, aka marshmallow. Plants are classified in this order. Species, then genus, then family, then order. Your marshmallow plant is classified like this. species-officinalis, genus-Althaea, family-Malvaceae, order

The order is Malvales. I'm not able to edit any longer.

All the plants in the family Malvaceae are referred to as mallows, so marshmallow is a mallow and Rose of Sharon, Hibiscus, Okra, cotton, Abutilon and the weed called velvetleaf are all mallows too. Not every Althaea root is marshmallow. Only the root of Althaea officinalis is marshmallow.

Yao shu kui in Chinese medicine to cool the blood. Might need to be used in a combination/formula with other herbs. It might be mentioned in the materia medica.

Rose of Sharon is Hibiscus syriacus, correctly, not Althaea. Not all Malvaceae are referred to as Mallows although in common parlance you could call them the Mallow Family. For example Linden trees are in that family.

Althaea root refers to Athaea officinalis, Marshmallow. The common name of the whole plant is Marshmallow, not only the root. The officinalis part of the name is a big clue that is has been used herbally for a long time. https://pfaf.org/user/plant.aspx?LatinName=Althaea+officinalis

Yeah, my mistake, floral is correct, and it's Hibiscus syriaca not Althaea syriacus. I think it was called Althaea at one time and it is a synonym. Now is the a fixed number of species that can be called mallows? I don't know where to draw the line, and I thought it was acceptable to refer to everything in Malvaceae as mallows?

Floral, I think that anything in Hibiscus or Malva can be called a mallow. So marsh mallow, which is Althaea officinalis, is not really a mallow?

https://youtu.be/RbL8FSAz3mA