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• A family of herbs, shrubs, or trees (order Polygonales) chiefly of the north temperate zone having mostly entire leaves with stipules forming a sheath round the stem and flowers that are spicate and apetalous and including the buckwheats.

• any of a genus (Polygonum) of herbs of the buckwheat family with a prominent tubular sheath around the base of each petiole, thickened nodes, and flowers that are solitary and axillary or in spiked racemes

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)

• 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

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

• a large family of flowering plants, mostly herbaceous annuals or perennials, but some are woody climbers or shrubs. Commonly called the buttercup family