I can see ◼︎ yellow trillium Trillium luteum

Verify with 🔍︎ images.

Part of trillium  genus Trillium in bunchflower  family Melanthiaceae (formerly family Liliaceae ), in lily / trillium / 🌷︎ tulip  order Liliales.

Native to 🇨🇦 Canada and 🇺🇸 USA, east of the 🗻︎ Rocky Mountains.

Uses by native peoples
(Ethnobotany database)

Uses by butterflies,
planting info   Wildflowers of West Michigan   (page 8)

Trillium likes sandy soil, because their seeds are disbursed by 🐜︎ ants, and ants like sandy soil.   Trillium seeds are disbursed by ants because trillium seeds (and seeds of other woodland plants to seem to grow in clumps) have a yummy attachment, that cause 🐜︎ ants to move them to their nests, up to 2.4 m (8 feet) [2] or 8 m (30 feet) away! [3]

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