Requirements include:

• suitable soils or substrate.
• adequate light and water for the duration of the growing season.
• pollinators, usually insect species, for many flowering plants.

Threats include

• physical disturbance.
• habitat loss to development or natural succession.
• changes to site hydrology.
• competition with introduced plants.
• herbicides.
• collecting. Unlike vertebrates listed native plants are not protected outside of provincial protected areas and federal lands.
• highly restricted distributions. Many species in this category are limited to one or a few very small sites, which exacerbates their vulnerability to all threats.

Strategies

Protect known populations

• Acquire habitat by purchase or via dedication during land subdivision, development permit, or rezoning processes.
• Require conservation covenants on habitats during the land subdivision, development permit or rezoning processes.

Prevent collecting

• Prevent collecting on lands within local government jurisdiction using a bylaw (municipalities only).

Reduce insecticide and herbicide use

• Ban insecticide and herbicide use for cosmetic purposes on lands within jurisdiction (municipalities only).
• Eliminate insecticide and herbicide use on local government lands.

Maintain natural fire frequency

• Conduct controlled burns on local government lands, where and when appropriate, under the advise of a knowledgeable ecologist.

• Consider species at risk when regulating the timing and extent of burning on private property.

Prevent/control invasive plant introductions

• Require the control or eradication of 'alien invasive' plants listed under the Community Charter's Environment and Wildlife Regulation using a bylaw (municipalities only).

Prevent changes to habitat hydrology

• Limit impermeable area in new developments through a zoning by-law.
• Encourage clustered development to reduce the development footprint through density bonuses.
• Require on-site infiltration of rainwater in new developments.
• Reduce water use through pricing and lawn watering restrictions.
• Reduce reliance on ecologically sensitive sources of municipal water.
• Restrict tree cutting on steep slopes using a tree cutting bylaw (municipalities only).

Prevent trampling or other physical disturbances

• Restrict access to known habitats on local government lands during the growing season.
• Prevent burning of habitats during sensitive periods using the fire permitting process.
• Include information on endangered plants, mosses and lichens and in public education materials and programming.