Dark Tall Grass

Dark tall grass generates as a decoration on the surface of the Modernity. Dark tall grass appears in different heights, up to 4 blocks high, but only in lush meadow it will generate that high.

Dark tall grass has different colors based on the biome it appears in.

Dark tall grass cannot be obtained in normal survival. It does not drop anything.

Generation
Dark tall grass can be found in every biome in the Modernity.

Regular biomes
In regular biomes, dark tall grass generates in small patches upon dark dirt blocks, dark grass blocks or humus blocks, usually one or two blocks high.

Meadows
In meadows, dark tall grass generates a lot more than in regular biomes. Almost two out of three sustainable blocks have a tall grass block generated upon it. It generates usually one or two blocks high.

Lush meadows
In lush meadows, dark tall grass generates even more than in normal meadows. It usually generates three or four blocks tall, generating one or two blocks with a lower chance. Most sustainable blocks are covered with tall grass.

Block states
Dark tall grass has 4 different states.

Placement
Dark tall grass can only be placed upon the following blocks, which can be considered as 'sustainable blocks': Dark tall grass can also be placed upon itself, extending the tall grass below it. This can only be done when the tall grass below it is less than four blocks tall.
 * Dark Dirt
 * Dark Grass Block
 * Coarse Dark Dirt
 * Humus

Blocks can be placed inside dark tall grass, replacing the tall grass block without destroying it. When the replacing block is not a sustainable block, the grass above it will disappear. Otherwise, the grass will decrease in lenght and sustain on the placed block.

Trivia

 * A bug with biome colors causes dark tall grass to look completely black in an overworld biome.
 * Dark tall grass is not removed during generation, even when a sustainable block changes into a non-sustainable block. This causes glitches where dark tall grass floats.
 * During generation, flowers may replace two blocks tall grass without a block update. This causes the grass above it to float above the flower, without having the bottom property set to true.
 * Dark tall grass breaks faster in survival than in creative and does not damage any tools.