Base notes, also called bottom notes, lower notes, and back notes, are the long-lasting parts of the fragrance, acting as fixatives and sometimes lasting days on the skin. They lend depth and intesity to the perfume, appearing in the “drydown” period after the middle notes fade.

Listing of essential oils which are used as base notes in perfumes and colognes.

amyris

balsam
bay
benzoin

cedarwood (atlas)
cinnamon leaf
clove bud
cypress

frankincense

galbanum
guaiacwood

helichrysum (immortelle)

jasmine

labdanum

myrrh

oakmoss
olibanum
opopanax

peru balsam

sandalwood

valerian
vetiver

ylang ylang

See also:

Listing of essential oils which are used as Top Notes in perfumes and colognes.
Listing of essential oils which are used as Middle Notes in perfumes and colognes.