Although there are 67 biomes as of 1.9.4, there are many more ".class" files which are used to generate the biomes. Some of them are the Terrain Generations, nerfing the vanilla biomes also give another class files, so it's basically 67 biomes is correct without the vanila biome nerfed and the Terrain Generations. Technical biome also counts, including beaches replaced by gravels, ponds etc.
High mountains coated with snow blocks, under the snow blocks lay spring water pools. This was made to resemble the mountain range located in Central Europe.
A biome made of tall lush bamboo trees. The floor can sometimes be made of Podzol blocks.
A flat marsh biome of willow trees with grey murky water.
The Bog consists of decaying trees and frequent water & poison pools.
Forests of Spruce and deciduous trees mixed together, to form this biome.
The Brushland consists of spread out small brush-like trees (hencefourth the name).
Biome consisting of hilly landscape, scattered small shrubs, and bushes. Small pockets of stone can also be found.
Cherry Blossom Grove
A beautiful and wondrous biome containing lush-coloured grass with Pink and White Cherry Trees.
A new biome released in 1.8, flat gravel, snow and stone covered grounds with some ice pits, serves as a replacement for Arctic Biomes.
Gigantic fir tree forests with a cool temperature and dull colored grass.
Large stone pillars with flat tops and Overgrown Stone
Dying forest full of sparsely populated trees.
Swamp biome consisting of dying trees and dark green grass.
A forest biome consisting of tall, thin trees with many oak shrubs littered on the ground.
A decaying forest filled with tallish dark oak and dying trees.
A vast expanse of flat terrain with tulips on almost every piece of ground.
Treeless, plain-like biome with many ponds here and there along with an abundance of sugar canes.
Beautiful Birch and Spruce Pear-Shaped trees make up this biome of dark grass.
Incredibly Detailed Hills of Pine Trees and bright purple Wildflowers.
This biome consists of rough, high terrain with cobblestone boulders and lacks trees.
Land Of Lakes
A colorful, mixed forest, made up of scattered islands around large lakes, created to resemble the forests around the Great Lakes of southern Canada and the United States.
Beautiful fields of lavender and jacaranda trees, with the occasional oak tree.
Desert made of hardened clay and flourishing, but messy trees. Unlike deserts, lush deserts have more vegetation.
Rich swamps providing more welcoming shades of green.
Maple and spruce trees littered about that resemble a taiga-like biome.
Flat land at sea level with many small pools and dirt patches.
A grassy biome with a few spruce trees and bushes scattered around.
Highlands of deep blue pools and swampflowers
Mountain Peaks of Oak, Pine and a range of blocks made to recreate the high Outdoor Wilderness.
Majestic grove of purple waters and beautiful enchanted trees. It is rare to find, though.
Dark Purple woods with a special sky and water colour. Poison pools can spawn here and several dangerous plants. Beware!
Formerly a sub-biome for the plains, it is now fields of large oak trees and bright grass, now serves as a replacement for the Dense Forest and possibly the Overgrown Greens.
Dusty flatlands with shrubs and red sand.
A very new tropical biome consisting of flat basins and huge high peaks of large Oak Bushes and Mahogany Trees.
A biome with light-colored grass and several trees scattered.
Muddy pits of frequent water pools and dead trees. The water is colored a rich brown and hardly any plants can grow in this biome.
A lush biome with many flowering oak trees.
A forest of tall Redwood Trees with oak shrubs. This was made to resemble the Redwood Forests in Northern California.
Lush bushes and grass make up the changing terrain of this wonderful biome, as they contain huge Sacred Oak trees, albeit being very spread out.
Forests of tall birch and oak trees with different colored autumn leaves.
A dark grass and stone covered biome, made to resemble the Canadian Shield and the foilage of Canada.
A relatively flat biome with oak shrubs and many allium flowers.
Snowy Coniferous Forest
Snowy variant of the Coniferous Forest biome.
A hazy oak forest covered with snow. Before 1.8 it was named Frost Forest.
Treeless semi-wasteland of dull sand and the occasional lakes.
Tall, coniferous trees in a wet temperate environment.
A beautiful biome made of unique mahogany trees, vibrant, lime green foliage and murky green water.
A snowless wasteland of shrubs and cobblestone.
A hazy biome with pools of poison and murky water. Dead trees also appear in this biome. It is an inhospitable place, and not recommended for beginners.
Lush swamps with a deep blue water color and willow trees.
Dry forests of only oak and logs.
A rare desert biome of several patches of grass and some bushes.
Nether Biomes haven't yet been readded to BOP 1.8 and above, but they will be soon, as of 16/7/16 they have started to add the code for the Nether Biomes according to the Official Changelog.
This list also includes biomes which were replaced by vanilla biomes with the same name, such as
Mesa, or Birch Forest. NOTE: When adding IPs, add the last version the biome appeared in.
A flat wasteland with no trees or tall grass, however villages can spawn. In earlier versions these were forests with tall fir trees. Removed in BOP for 1.8.
Canyons are large hills made of Hardened Dirt with some trees.
A forest filled with tall oak trees. Small birch and oak shrubs can be found on the ground. They somewhat resemble Temperate Rainforests.
Dense forest of large oak trees and some small pockets where shrubs spread across the ground.
Enormous desert hills with dunes grass scattered everywhere
A lush, forest biome with grown mushrooms and jungle trees. Small patches of Mycelium and rare herds of Mooshroom cows can be found here.
Twisting jade-coloured mountain cliffs covered with pine trees, created due to an opinion poll.
Land Of Lakes Marshland
Sub-biome to the Land of Lakes biome. Many small pools surrounded by mud are found here.
A sub-biome of the Meadow. Consists of many more spruce trees.
A lush plains biome consisting of messy grass everywhere and large oak trees.
Dry Grassland with shrubs and some trees.
A rare swampy biome with many patches of cobwebs. The foliage shows its dark, dull color.
Dark and dense marshes with large shallow green ponds. Large oak trees prevent sunlight from reaching the ground.
Dense, dull-colored Shrubs take up the majority of this biome. Thorns are also found on the ground.
Snowy Dead Forest
A snowy version of the Dead Forest biome.