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Oregon Gumweed
Grindelia stricta
  


About Oregon Gumweed (Grindelia stricta) Grindelia stricta is a species of flowering plant in the Asteraceae (Sunflower) family known by the common names Coastal Gumweed and Oregon Gumweed. It is native to the west coast of North America from California to Alaska, where it is a resident of coastal plant communities such as those in marshes and beaches. In California it is found from the Channel Islands northwards, typically in close proximity to the coast. There are three recognized Varieties: This plant is variable in appearance, taking the form of a weedlike perennial herb forming low clumps to a sprawling subshrub growing erect to heights exceeding one meter. Its foliage and stems are green to rusty red or purplish and the plant may be hairy to hairless. The fleshy leaves are green, often with red edges and veining, and are up to 15 centimeters in length on large plants. The flower cluster holds one or more flower heads each up to 5 centimeters wide. The flower head is a cup of thick erect or recurved green phyllaries. Yellow disc florets fill the center of the flower head and there is a fringe of yellow ray florets around the circumference. The head produces copious white exudate, especially in the early stages of blooming. This exudate was used by native people as an adhesive.
Plant Description
Plant Type
Perennial herb

Max. Height
3.3 - 5 ft (1 - 1.5 m)

Max. Width
7 ft (2.1 m)

Form
Spreading

Fragrance
None

Growth Rate
Moderate

Dormancy
Summer Semi-Deciduous

Leaves
Dark green, elliptical, usually toothed edges, succulent

Flower Color
Yellow, Red

Flowering Season
Spring, Summer, Fall
Spring
Summer
Fall
Winter


Native Status
Native

Natural Setting
Site Type
Tidal flats, marshes, dunes, seabluffs and coastal strand where it receives extra moisture from fog and sea spray. Also occurs in coastal sage scrub in more upslope areas

Sun
Sun, Part Shade

Elevation ?
-59' - 1728'

Annual Precip. ?
11.8" - 75.0"

Summer Precip. ?
0.17" - 1.98"

Coldest Month ?
43.7° F - 55.7° F

Hottest Month ?
56.6° F - 72.5° F

Humidity ?
0.02 vpd - 18.29 vpd

Soil Description
Typically sandy

Soil Texture
Loamy Sand, Sand, Sandy Loam

Soil PH
5.0 - 7.5

Soil Toxicity Tolerance
Tolerates Saline Soil

Drainage
Fast, Standing

Cold Tolerance(° F)
Tolerates cold to 30° F

Wildlife Attracted
Butterflies are attracted to the flowers and buds

Landscaping Information
Ease of Care
Very Easy

Water Requirement ?
Moderate - High
Extremely Low
Very Low
Low
Moderate - High


Max. Summer Water ?
3x/month
No Summer Water
1x/month
2x/month
3x/month
1/week
Keep moist


Mulch
Inorganic

Pruning
Deadhead to encourage flowering

Propagation ?
Rooted cuttings

Common uses
Groundcovers, Deer Resistant, Butterfly Gardens

Nursery Availability
Commonly Available

Other Names
Common Names
Coastal Gumweed



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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