Pioneer is an expansive biome and world generation mod aimed at complementing the vanilla biomes by keeping it simple and not straying too far from the vanilla style. It comes with my take on several popular trees such as firs and redwoods.
Biomes
Aspen Grove - an autumn forest with maples, aspens, and oaks
Autumnal Coniferous Forest - a boreal forest with evergreen firs and bright yellow tamaracks
Baobab Fields - a savanna with towering baobab trees
Blossoming Fields (removed in 1.20) - a colorful field of white and pink sakura trees
Boreal Forest - a cold, but lush taiga of tall fir trees
Crystal Lakes - a wet boreal forest with amethyst crystals
Desert Shrubland - a grassy desert with joshua trees and new desert flora
Flooded Forest - a flooded forest and a good source of dripleaf
Old Growth Baobab Fields - a variant of the baobab fields with a taller, denser canopy
Overgrown Spires - a lush jungle with rocky spires that reach the sky
Pine Meadows - an open field of pine trees and spruce shrubs, covered in streaks of diorite
Prairie - an expanse of yellow prairie grass and the occasional cottonwood
Redwoods - a forest of giant redwood trees
Red Rock Canyon - a lush variant of the eroded badlands
Red Rock Cliffs - a lush variant of the badlands
Snowy Boreal Forest - snowy version of the boreal forest
Snowy Redwoods - snowy version of the redwoods
Verdant Sands - a lush desert with strips of green grass
Willow Wetlands - a swamp of willow and mangrove trees, with sea pickles that light up the swamp at night
Windswept Cliffs - a greener, mossy variant of the stony peaks
Extras
Juniper trees - generates in badlands. Their leaves can be harvested for juniper berries, which can be a source of food in the badlands.
Palm trees - generates on sandy beaches. Can have coconuts that can be crafted into coconut milk