Evergreens

symbolizing: Continuity of Life, Protection, Prosperity
types: Pine, Fir, Cedar, Juniper, other evergreens
forms: boughs, wreaths, garlands, trees
divinities: Green Goddesses & Gods; Hertha; Cybele, Attis, Dionysius (Pine); Woodland Spirits traditions: Roman, Celtic, Teutonic, Christian

Holly

symbolizing: Old Solar Year; Waning Sun; Protection; Good Luck
forms: boughs over portals, wreaths
divinities: Holly King; Old Nick; Saturn; Bacchus; Wood Spirits; Holly Boys
traditions: Roman, Celtic, English, Christian

Oak

symbolizing: New Solar Year; Waxing Sun; Endurance, Strength, Triumph, Protection, Good Luck
forms: Yule log, acorns, wood for sacred fires
divinities: Oak King; Oak Spirit; Sky Gods including Thor, Jupiter, Zeus
traditions: Teutonic, Celtic, Christian

Mistletoe

symbolizing: Peace, Prosperity, Healing, Wellness, Fertility, Rest, Protection
forms: boughs, amulet sprigs above doorways, kissing balls
divinities: Oak Spirit; Frigga and Balder
traditions: Celtic, Teutonic

Ivy

symbolizing: Fidelity, Protection, Healing, Marriage, Victory, Honor, Good Luck
forms: crowns, wreaths, garlands
divinities: Dionysius; Bacchus; Great Goddess; Ivy Girls
traditions: Greek, Roman, English, Christian

Frankincense

symbolizing: Sun, Purification, Consecration, Protection, Spiritual Illumination
forms: incense, oils
divinities: Sun Gods, Ra at Dawn, Bel
traditions: Babalyonian, Assyrian, Egyptian, Jewish, Greek, Roman, Christian

Myrrh

symbolizing: Healing, Death and Afterlife, Purification, Inner Peace
forms: incense, oils
divinities: Isis, Ra at Midday
traditions: Egyptian, Jewish, Christian

Wheat

symbolizing: Sustenance, Abundance, Fertility, Good Luck
forms: grain, straw figures and symbols, cookies, cakes, breads
divinities: Earth Goddesses; Saturn & Ops; Goat Spirit; Fairy Folk
traditions: Roman, Celtic, Scots, Teutonic, Sweedish, Christian

Celtic Tree Calendar's Sacred Trees of Winter Solstice

Yew: Last Day of Solar Year; Death.
Silver Fir: Winter Solstice Day; Birth.
Birch: Month following Winter Solstice; Beginning of Winter