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Trillium undulatum

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Plant types and subtypes: Perennials

Light Requirements: shade

Water Use: medium

Soil Moisture: moist

Soil Description: acid, rich, loam

Height: 6"-16"

Bloom Time: April, May, June

Bloom Color: white, pink

Leaf Color: green

Hardiness Zone: 3, 4, 5, 6, 7

Additional Tags: clumping, ornamental foliage, shade garden plant, woodland plant

Flower of Trillium undulatum (painted trillium)
  • Flower of Trillium undulatum (painted trillium)
  • Flower of Trillium undulatum (painted trillium)

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Description

Trillium undulatum

Also known as:

painted trillium

,

painted wakerobin

,

laurel trillium

Scientific Synonyms:

Description

The flower of the painted trillium is probably the most attractive of any in the genus. It appears on a short stem above the leaves, it is white with a deep pink center and ruffled edges, hence the botanical name undulatum which means wavy.

Cultivation

Trillium undulatum is a true woodland beauty. It is particularly heat intolerant and requires a very acidic environment. The soil should be rich, well drained yet consistently moist. Best planted in open shade or with a north facing exposure where it will be protected from sun and heat. Best planted in groups, it blooms in late spring, April to May. One of the hardiest Trilliums: zones 3-7

Propagation

Established clumps can be divided in summer. Slow to propagate from seed.

Additional Notes

Once established, Trillium undulatum will form a clump with an increasing number of flowers. Mulching will help maintain adequate moisture and acidity levels. All members of the Trillium genus have leaves and petals that grow in multiples of three, hence their botanical name.

Native Range & Classification

Recorded County Distribution: USDA data

Native Range:
CT, GA, KY, MA, MD, ME, MI, NC, NH, NJ, NY, OH, PA, RI, SC, TN, VA, VT, WV

USDA Endangered Status:

  • Endangered: MI, OH
  • Exploitably Vulnerable: NY
  • Threatened: KY

Classification

Kingdom Plantae Plants
Subkingdom Tracheobionta Vascular plants
Superdivision Spermatophyta Seed plants
Division Magnoliophyta Flowering plants
Class Liliopsida Monocotyledons
Subclass Liliidae
Order Liliales
Family Liliaceae Lily family
Genus Trillium trillium
Species Trillium undulatum painted trillium