Nutmeg is the seed kernel of Myristica fragrans, while mace is the dried aril (the lacy covering around the seed). They are classified under separate subheadings within 0908 — 090811/090812 for nutmeg and 090821/090822 for mace — so the physical part of the plant determines the correct subheading.

The subheadings for cardamom (090831 for whole, 090832 for crushed or ground) do not distinguish between whole pods and loose seeds; both whole forms fall under 090831. The key classification variable is whether the product has been crushed or ground, not whether the pod has been opened.