Memorize the four comparisons:
1. House and construction — the building is included without separate mention.
2. Land and permanent trees — palms and other trees pass without separate mention.
3. Land and standing crop — the crop does not automatically pass; it must be specified.
4. Tree and its existing fruit — fruit normally stays with the seller unless the buyer stipulates it.
The unifying idea is the distinction between lasting attachments and harvestable produce.