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Hoary Cress and Himalayan Blackberry

This invasive species named the Hoary Cress or Cardaria Draba calls hay fields, rangeland meadows and roadsides home. This weed can live and spread for several years. It has white flowers and grayish green leaves that are arrow shaped. It affects native vegetation by competing for nutrients and it is a problem when it comes to agriculture.

 

 

            The Himalayan Blackberry or the Rubus Armeniacus is an invasive species found along roadsides, right-of-ways, pastures, wetlands, along riversides and stream banks, riparian areas, forest edges and wooded ravines. This plant commonly only lives for two years. Its flowers are either pink or white and are grouped in clusters of 5-12. The stalks are prickly and the stems are robust. Its berries are black and are 2 centimeters in diameter. The berries are also shiny and hairless. The Himalayan Blackberries affect growing native vegetation by out-competing them with dead stems, build up of leaf-litter and by not leaving enough light for the native vegetation to grow. It prevents trees like Garry Oak and Ponderosa Pine from growing because it blocks the light from reaching them. The blackberries can make it hard for big animals to move, can take over stream channels and stream banks and reduce sight lines along right-of-ways. This is due to the thickets it forms which are big, dense and impossible to pass through.

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