The Divine Farmer's Materia Medica: Woods

Here we will discuss the three classes of woods in The Divine Farmer's Materia Medica.  I am using the Blue Poppy edition.
More here:  Herbs Superior Class; Herbs Middle Class; Fruits & Vegetables.
The Divine Farmer's Materia Medica classifies herbs by category (Jades & Stones, Herbs, Woods, Animals, Fruits & Vegetables, and Cereals) into three classes (Superior, Middle, and Inferior).  Here we will consider the trees.  The links above and future posts (except, perhaps if related to the subject of woods) will occur in the Materia Medica blog. 

Woods: Superior Class

Poria cocas (Fu Ling / Tuckahoe)

Pine Resin

Bai Shi (Biota Orientalis / Bai Zi Ren / Bai Ren) seed

CInnamon

Eucommia

Vitex (Chaste Berry / Chaste Tree)

Privet Fruit

Mulberry Mistletoe

Phellodendron

Magnolia Flowers

Elm

Jujube Date Seed

Sophora

Lycium (Fruit, Stem, and/or Root)

Citrus

Woods:  Middle Class

Magnolia Bark

Euphoria

Bamboo

Immature Citrus

Dogwood

Ash

Gardenia

Tree-Of-Heaven

Prickly Ash

Fermented Elm Seed

Mulberry Root Bark

Wood Ear

Woods:  Inferior Class

Usnea

Acanthopanax (Eleuthrococcus)

Umbrella Polypore

Jujube Date Spines

Winged Wahoo (Euonymus)

Prickly Ash

Illex

Flowering Cherry Seeds

Weeping Willow

Catalpa

Old Decayed Wood