On This Day: 07 March 1971 Egypt refuses to renew the ---------- ceasefire ?

Questions

Common name for a family of mostly herbaceous flowering plants, & for its representative genus?

Common name for a family of woody or herbaceous flowering plants of worldwide distribution, & for its well-known genus?

Common name for a genus of about 40 species of coniferous trees, indigenous to the northern hemisphere, nearly half being natives of North America?

Common name for a genus of perennial flowers of the buttercup family?

Common name for a large genus of hardwood trees that are widespread in the north temperate zone?