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Poa Atropurpurea is also known as San Bernardino bluegrass

Images of Poa Atropurpurea at

Poa Atropurpurea is known by the common name San Bernardino bluegrass.

Overview of Poa Atropurpurea

• It is a rare species of grass.
• They belong to Pooideae subfamily of the Poaceae family.
• It is a native to the temperate regions of both hemispheres.
• Poa atropurpurea is a monocot.
• It is a perennial herb.
• It is native to California.
• It is included in the CNPS Inventory of Rare and Endangered Plants on list.
It is endemic to:
– Southern California
– San Bernardino Mountains near Big Bear
– Laguna Mountains of San Diego County
• This grass grows in wet mountain meadows.
• It is a rhizomatous perennial grass.
• It grows in small and loose tufts.
• It can grow about 1/2 a meter tall.
• The leaves are narrow and firm.
• The leaves have rolled or folded edges.
• It is a dioecious plant.
• It has male and female flower types.
• The inflorescence is lance-shaped.
• It has branches appressed.
• They spread upwards along the stem axis.
• Male and female inflorescence are similar.
• There are about 70 spikelets each.
• They are purple in color.

Lepidoptera whose caterpillars use Poa as its food include:
– Agriphila inquinatella
– Cercyonis pegala
– Poanes hobomok
– Poanes zabulon

Scientific Classification of Poa Atropurpurea

• Kingdom : Plantae
• (unranked) : Angiosperms
• (unranked) : Monocots
• (unranked) : Commelinids
• Order : Poales
• Family : Poaceae
• Genus : Poa
• Species : P. atropurpurea
• Binomial name : Poa atropurpurea

Growing/Caring conditions

• This is an incredibly easily grown plant.
• It succeeds in well-drained soils.
• It prefers moderately fertile soil.
• It grows well in a sunny position.
• It can tolerate very acid soils.
• This plant is a very common garden weed.
• It usually does not require cultivation.
• This is an essential food plant for the caterpillars of numerous species of butterfly.
• It is seen growing in close cut lawns.
• The seed drops very readily in the plant and hence is difficult to harvest.
• But this way the seed is spread effortlessly.
• It makes the flower even more difficult to eradicate.
• A lot of the species are very important pasture plants.
• They are used extensively by grazing livestock.
• Many of the Poa species are popular for gardens as well as for landscaping in New Zealand.

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