that are …
boot-top high (~30 cm high) (~12 in high)  or
ankle-high (<9 cm high) (<3½ in high) :

Boot-top high (~30 cm high) (~12 in high)

with a …
flower appearing above the leaves  or
flower appearing below the leaves :

Flower appearing below the leaves

three leaves attached at equal 120° angles
flower appears beneath the leaves, with white petals
nodding trillium/whip-poor-will flower  Trillium cernuum

three leaves attached T-shaped at 90°, 90° and 180° angles
green flower appears beneath the leaves,
Jack in the pulpit  Arisaema triphyllum

Learn more about trillium genus Trillium

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

Various species are native to different temperate areas of 🇨🇦 🇺🇸 North America and Asia.   ▭ 🌎︎ Map of most species by county (🇺🇸 USA-48), (all species together) (colors).

Uses by native peoples
(Ethnobotany database)

Trillium hosts caterpillars of 2 species
of butterflies and moths, in some areas.
Uses by butterflies,
planting info
  Trillium likes sandy soils, because their seeds are disbursed by 🐜︎ ants, and ants like sandy soils.

Wildflowers of West Michigan  Adobe Acrobat Reader file (page 8)

🔍︎ 🔍︎ images Discover Life Encyclopedia of Life Michigan Flora Minnesota Wildflowers Flora of North America USDA PLANTS db USFS Wikipedia