Of two or more colors.

A plant lacking chlorophyll and living on dead organic matter.

A type of basaltic lava usually characterized by high viscosity resulting in a rough, broken, rubbly appearance to the resulting lava flow.

The hindmost of the three subdivisions of an insect's body, or the two subdivisions of a spider's body.

A species that has appeared in a given area only a very few times and whose normal range is in another area.

Dormancy during summer or dry season.

A desert plant with a spike-like flower, similar to a Yucca plant.

A level area or plain in an arid or semiarid region, usually low-lying with poor drainage, encrusted with alkali salts that became concentrated by evaporation; a salt flat. See also playa.

Relating to mountains; often descriptive of plants, animals, and scenery found in mountainous regions.

Any physical or chemical change in a mineral or rock subsequent to original formation; usually results in the formation of new minerals or in textural changes in the rock.