Aromatic plant or dark pine cultivated on east of Alps (9)

'aromatic plant' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'dark pine cultivated on east of alps' is the wordplay.
'cultivated' is an anagram indicator.
'on' is a charade indicator (letters next to each other).
'east of' indicates one should take the final letters (the letter at the right or eastern end of the word).
The final letter of 'alps' is 's'.
'dark'+'pine'='darkpine'
'darkpine' anagrammed gives 'pikenard'.
'pikenard' put after 's' is 'SPIKENARD'.

'or' acts as a link.

Can you help me to learn more?