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• A genus comprised of herbaceous flowering plants of the rose family (Rosaceae). The common name, which means “five-leaved,” refers to the number of leaflets in the compound leaf, though some species have three or seven (or more) leaflets. Most of the species are native to the north temperate zone and the Arctic, and a number are used as ornamental species.

Use for: primroses

• Flowering plants of the genus Primula of the family Primulaceae, chiefly occurring in the Northern Hemisphere in cool or mountainous regions. The plants are low-growing, usually perennial herbs; a few are biennials.

• a family of herbaceous and woody flowering plants, commonly known as the primrose family (but not related to the evening primrose family). The group is worldwide in distribution, including in the Old World tropics, throughout the Americas, and in temperate and colder regions of the Northern Hemisphere; many members are Arctic or Alpine. The family underwent significant taxonomic revision and includes the now disbanded families Maesaceae, Myrsinaceae, and Theophrastaceae, according to the Angiosperm Phylogeny Group IV (2016).

• any of a genus (Prunus) of drupaceous trees or shrubs of the rose family that have showy clusters of usually white or pink flowers first appearing in the spring often before the leaves and including many grown for ornament or for their fruit (such as the plum, cherry, or apricot)

• The maidenhair fern family (order Polypodiales). Members of Pteridaceae are distributed throughout the world, especially in tropical and warm-temperate regions. The plants are extremely diverse ecologically, ranging from floating aquatic plants to rock ferns in deserts and seasonally arid places. Some species are cultivated as ornamentals.

• lower vascular plant, any of the spore-bearing vascular plants, including the ferns, club mosses, spike mosses, quillworts, horsetails, and whisk ferns. Once considered of the same evolutionary line, these plants were formerly placed in the single group Pteridophyta and were known as the ferns and fern allies. Although modern studies have shown that the plants are not in fact related, these terms are still used in discussion of the lower vascular plants.
• a division of vascular plants coordinate with Bryophyta and Spermatophyta and coextensive with the subdivisions Psilopsida, Lycopsida, Sphenopsida and the class Filicineae of the Pteropsida

• The largest genus in Pteridaceae, Pteris (brakes), distributed throughout tropical and warm temperate parts of the world and is known for the large number of hybrids between various species.

Use for: oak

• A genus of ornamental and timber trees and shrubs in the beech family (Fagaceae), distributed throughout the north temperate zone and at high altitudes in the tropics