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snow-in-summer, snow-on-the-mountain, ghost weed, Euphorbia marginata | annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk ❲Euphorbia marginata❳ | |
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love-in-a-mist, snow-in-summer, Cerastium tomentosum | chickweed with hairy silver-grey leaves and rather large white flowers ❲Cerastium tomentosum❳ |