Hyperspecific post for people who live in WA, in the Tacoma/Olympia area or near Sequim: you may be in the range of an endangered butterfly whose native host plant (the plant it lays eggs on, that the caterpillars eat) is the paintbrush. Check the range here.
Image: The Taylor's Checkerspot butterfly. [source]
Habitat loss is one of the biggest driving factors towards its decline, because its habitat is Garry Oak Prairie, which is an endangered ecosystem due to fire suppression, agriculture, etc.
A significant part of the Taylor's Checkerspot population in Washington is centered around a big swathe of land that wasn't converted to other uses due to being a military base (Fort Lewis), which means that it's also potentially threatened by military exercises.
I believe the push to grow Milkweed for Monarchs took less effort because milkweed grows like a weed. Paintbrush is hemiparasitic: it connects to other plants' roots for extra nutrients/energy, but usually specific plants, like lupine and grass species. So one would need to grow those first, or sow their seeds and paintbrush seeds at the same time, and hope they connect. I suspect it would be rather difficult to make growing paintbrush a widespread thing over there.
Images: harsh paintbrush; golden paintbrush. Golden paintbrush is a threatened species. [Source] [Source]
But you know what ISN'T hard to propagate?
Plantain.
Images: the two most common species, common plantain and ribwort plantain [source] [source]
That's right, this incredibly common non-native plant that will grow in your lawn is the ONE other genus that these endangered butterflies will eat.
But lawns are not hospitable environments for baby caterpillars!!
If you have a pollinator garden within the range of this butterfly, consider including plantain. I don't know how much it will help; I don't know what the likelihood of them finding it is, and there are more threats than just loss of host plants.
But I was in the land of milkweed recently, and it was incredibly heartening to see the number of people who had allowed Milkweed to grow: even letting it grow in the middle of their otherwise manicured lawn.
People want to help, and if enough people plant gardens and include host plants for this gorgeous little creature, whether the native wildflower or the introduced weed, maybe it will make a small difference. It's worth a shot.
Some more information on this really cool butterfly and it's host plants!
- the reason why the caterpillars can use plantain is because plantains have the same iridoid glycosides as golden paintbrush!
- as with Monarchs and milkweed, the plants the caterpillars feed on are mildly poisonous (because of the iridoid glycosides) and the caterpillars use these compounds to make themselves mildly poisonous and taste bitter to prevent predation!
- Golden paintbrush in the South Puget Sound region has most successfully been grown using yarrow or Oregon Sunshine as host plants. When I show people this plant in real life, I point out that you almost always see them right next to either yarrow or Oregon Sunshine. Sometimes they use other plants, but they have the most success with those two species.
- Golden Paintbrush itself used to be federally endangered, but once they figured out the host plants, propagation efforts became very successful.
- You can buy golden paintbrush here:
Height: This perennial can grow 10 to 14 inches tall. Habitat: Grows best in a dry or well drained area with full sun. Foliage: Alternat
- You can buy Oregon Sunshine and Yarrow seeds here, from the CNLM which is very involved in the efforts to save Taylor's Checkerspot and Golden Paintbrush:
- You can also get the seeds here:
native grass and wildflower seed for pollinator conservation, rain gardens, meadows, and wildlife habitat in Oregon and Washington.
- Both yarrow and Oregon Sunshine are tough, resilient plants that like full sun and well-drained soil. Do not make the soil rich and fertile like you would for non-native garden plants. Do not water once established. Do not plant them in shade. They are prairie plants, adapted to the conditions and soils of the prairies that developed on glacial till and have been maintained by the native peoples of this area.
- Taylor's Checkerspot butterflies are present in three prairies located in the south sound region that I know about, and I have personally seen them using narrow leaf plantain. These are areas south of Olympia. If you're between exit 95 and Fort Lewis in the Puget Lowlands, there's a lot of work going on around you to support these species.
- while considering these, also consider Viola adunca (a host plant to multiple other local struggling butterfly species) and local Lomatiums (support SO MANY native bee species)
- Learn about the Oregon white oak prairies please! They are SO COOL and we only have 3% of their historic range left! They are incredibly important both to the native peoples of this region and SO MANY unique native species. They are so packed with so many species it's so cool!


















