It’s all connected! Know your Ecosystem – Butterflies and Moths Love Ocean Spray (Holodiscus discolor)


We all love butterflies and moths, right?

Did you know Ocean spray is one of our native plants? Lots of folks don’t even know this and label it as “invasive,” or a “fire hazard,” then rip it out of the ground to replace it with non-native ornamentals or worse, leaving the formerly healthy, forested understory devoid of vegetation.

Image from – http://nativeplantspnw.com/ocean-spray-holodiscus-discolor/

Did you know?

Here’s a bit of historical trivia – Ocean spray is sometimes called Indian arrowwood because Native Americans made use of its straight hardwood branches for arrow shafts. They also used oceanspray for treating viral and skin diseases. Other names for this plant are Holodiscus discolor, ironwood or creambush. There is actually a novel phenolic component in the plant called Stilbene a Xyloside that has been associated with varied biological and medicinal activities.

Some reasons I’d like you to appreciate Ocean Spray….

  1. It is a larval host plant to some of our native butterflies and moths. These include the beautiful Pale Swallowtail (Papilio eurymedon), Spring Azure (Celastrina sp.), Lorquin’s Admiral (Limenitis lorquini), and Gray Hairstreaks (Strymon melinus). One particularly notable one here on our island is the delicate Fairy Moth (Adela septentrionella). Calscape (California Native Plant Society) lists 14 confirmed species of Lepidoptera associated with Ocean Spray (and 23 as likely) for a total of 37 species native to the state of CA. I could not find published studies for this in WA state, but link the Calscape page here https://calscape.org/plantleps.php?hostsloc=california&species=Holodiscus+discolor
  2. Ocean spray provides cover and forage for wildlife. Birds, small amphibians, and deer rely on native plant species like Ocean Spray that make up part of the forest understory and are a component of a healthy ecosystem. Fire-scaping may be on your mind, but one way around this is to look at installing adequate water cachement around your home to help keep vegetation from drying out and dying in late summer and fall. We want to live in the forest, but if we remove the native understory, we risk altering the landscape even more and losing these beautiful creatures!
  3. Ocean Spray flowers provide pollen and nectar for native bees! 🐝
Fairy Moth – https://bugguide.net/node/view/26749

Read more about Ocean Spray here:

https://www.researchgate.net/publication/222005193_A_stilbene_xyloside_from_Holodiscus_discolor_bark

http://nativeplantspnw.com/ocean-spray-holodiscus-discolor/

https://blogs.oregonstate.edu/treetopics/2016/07/14/shrubs-wildlife-oceanspray/

Thanks for reading!

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