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Poa macrantha
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Seashore Blue Grass
( Poa macrantha )
Poa macrantha
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Seashore Blue Grass (Poa macrantha)
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Poa macrantha
is a species of grass known by the common names seashore bluegrass and large-flowered sand dune bluegrass. It is native to the west coast of North America from Alaska to northern California, where it grows in sand dunes and other beach habitat.
Poa macrantha
is a perennial grass growing in loose clumps with stems up to 60 centimeters in maximum height. The grass grows from a network of very long, stout rhizomes and stolons which may be up to 4 meters in length, anchoring the grass in its shifting sandy substrate. The inflorescence is a dense series of clustered spikelets which are flattened and longer than wide. The plant is dioecious with male and female individuals bearing different types of flowers; the two flower types are similar in appearance.
Plant Description
Plant Type
Grasses
Size
0.4 - 2 ft tall
Form
Upright
Growth Rate
Slow
Flower Color
Yellow
Flowering Season
Winter
Wildlife Supported
Butterflies & moths hosted ( 9
likely
* )
SHOW ALL
*
Juba Skipper
Hesperia juba
Hesperia juba
*
Common Ringlet
Coenonympha tullia
Coenonympha tullia
*
Common Wood Nymph
Cercyonis pegala
Cercyonis pegala
*
Small Wood-Nymph
Cercyonis oetus
Cercyonis oetus
*
Sachem
Atalopedes campestris
Atalopedes campestris
*
Armyworm Moth
Mythimna unipuncta
Mythimna unipuncta
*
Olive Green Cutworm Moth
Dargida procinctus
Dargida procinctus
Landscaping Information
Soil Description
Prefers sandy or loamy soils. Does not grow well in clay soils.
Natural Setting
Climate
Annual Precipitation: 38.7" - 75.0", Summer Precipitation: 0.68" - 2.28", Coldest Month: 29.8" - 47.8", Hottest Month: 50.9" - 66.5", Humidity: 0.08" - 15.47", Elevation: 4" - 7745"
Alternative Names
Common Names
: Large-flowered Sand Dune Bluegrass, Seashore Bluegrass
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Seashore Blue Grass
Poa macrantha
Sources include:
Wikipedia
. All text shown in the "About" section of these pages is available under the
Creative Commons Attribution-ShareAlike License
. Plant observation data provided by the participants of the
California Consortia of Herbaria
, Sunset information provided by
Jepson Flora Project
. Propogation from seed information provided by the
Santa Barbara Botanical Garden
from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include
CalPhotos
,
Wikimedia Commons
, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include
Calflora
,
CNPS Manual of Vegetation Online
,
Jepson Flora Project
,
Las Pilitas
,
Theodore Payne
,
Tree of Life
,
The Xerces Society
, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from
PRISM Climate Group, Oregon State University
, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.
Links:
Jepson eFlora Taxon Page
CalPhotos
Wikipedia
Calflora
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