Answer:
In a hierarchical system of plant classification, the taxonomic rank that generally ends in '-aceae' is the family rank.

Hierarchical System of Plant Classification:
The hierarchical system of plant classification is a way to organize and categorize plants based on their characteristics and evolutionary relationships. It consists of several taxonomic ranks, each representing a specific level of classification. The ranks, from broadest to most specific, are kingdom, division, class, order, family, genus, and species.

Explanation:
The taxonomic rank that generally ends in '-aceae' is the family rank. A family is a group of related plants that share common characteristics and are classified together. The name of a plant family usually ends in '-aceae', which is derived from the Latin word for family.

For example, the family name for roses is Rosaceae, for orchids is Orchidaceae, and for grasses is Poaceae. These plant families include different genera (plural of genus) that share common traits and are grouped together within the family.

Other Taxonomic Ranks:
- Genus: The genus is a more specific taxonomic rank than family and includes a group of related species. The name of a genus is always capitalized and italicized, such as Rosa for roses, Phalaenopsis for orchids, and Zea for corn.
- Order: The order is a higher rank than family and includes a group of related families. The name of an order ends in '-ales', such as Rosales for roses, Orchidales for orchids, and Poales for grasses.
- Class: The class is a higher rank than order and includes a group of related orders. The name of a class ends in '-opsida', such as Magnoliopsida for flowering plants, Liliopsida for monocots, and Pinopsida for conifers.

Conclusion:
In summary, the taxonomic rank that generally ends in '-aceae' in a hierarchical system of plant classification is the family rank. The family represents a group of related plants, and the name of a plant family always ends in '-aceae'.