Poisonous Plants
This is an incomplete list of plants containing poisonous parts that pose a serious risk of illness, injury, or death to humans or animals.
Poisonous food plants Many food plants possess toxic parts, are toxic unless processed, or are toxic at certain stages of their life.
Beneficial Weeds
Beneficial weeds can be classed in a number of categories. Categories of Beneficial Weeds
Pest-repellant, Edible, Habitat for beneficial insects, Shelter plants
Normal grass can be used as ground cover, especially in nitrogenous soils
Trap Crops
Trap crops draw potential pests away from the actual crop intended for cultivation
Repellent Plants
These are plants which repel insects, plants, or other pests like nematodes, fungi, or animals through chemical means. Categories:
General insects, Moths and their larvae, Parasitic pests, Mammals
House Plants
List of common houseplants
Tropical and subtropical houseplants
Air-Filtering Plants
List of air-filtering soil and plants The first list of air filtering plants was compiled by NASA as part of the NASA Clean Air Study, which researched ways to clean air in space stations. As well as absorbing carbon dioxide and releasing oxygen, as all plants do, these plants also eliminate significant amounts of benzene, formaldehyde and/or trichloroethylene. The second and third list are from Dr. B.C. Wolverton's book and focus on removal of specific chemicals.
Exotic Plants
The term Exotic plants is often used to describe plant species that have been, or are being, introduced in to parts of the world other than their historical or documented range by humans, often as ornamental plants. Exotics are frequently utilized in the garden, but are also kept in greenhouses or as houseplants. While no plant species has ever been documented driving another species to extinction, exotics that escape from gardens are often labeled invasive species thought to outcompete native flora. In reality, however, this phenomena is exclusively a result of other anthropogenic activities such as fertilizer runoff or habitat disruption/destruction. Only humans and a handful of domesticated mammalian species (particularly cats and pigs) have ever been directly responsible for the extinction of another species.
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