| Layne's butterweed grows in open rocky areas of gabbro and serpentine soils within chaparral plant communities. |
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| Streambank butterweed is found from British Columbia south to California, and east to Saskatchewan and New Mexico. |
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| Among them, butterweed is a cool-season annual that usually grows to 18 to 20 inches tall. |
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| Tall butterweed also has well developed upper leaves and is in much drier habitats. |
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| Rooting for food, they have wrenched up butterweed, purple milkweed and the Carolina bogmint, which is found in only 13 other places in the world. |
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