Also known as Longbract Wakerobin · Mottled Trillium
Safety note: This plant may be toxic to humans and pets. See toxicity details.
Underwood's trillium (Trillium underwoodii) is a rare woodland perennial native to Alabama and Georgia, featuring striking mottled leaves and a deep crimson flower.
At-a-glance light, water, soil, and growing conditions from plant data
Partial to full shade
25% intensity
Prefers dappled sunlight under deciduous trees. Avoid direct sun.
Consistent moisture during growth
50% intensity
Keep soil moist but well-drained. Reduce in dormancy.
Rich, moist, well-drained soil with plenty of organic matter.
50% intensity
Cool to temperate
50% intensity
Requires a cool dormant period in winter. Protect from extreme heat.
Minimal
25% intensity
Light feeding with organic matter in spring is usually sufficient.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | Yes 2/5 intensity |
| Toxic for pets | Yes 2/5 intensity |
| Edible | No |
Contains saponins, which can cause gastrointestinal upset if ingested. The entire plant is toxic.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly during the growing season, keeping the soil consistently moist but not waterlogged. Reduce watering significantly as the foliage begins to yellow and die back in late summer or fall.
Ensure good drainage to prevent root rot, especially in containers.
Pruning is usually not necessary for Trillium underwoodii. Remove dead or damaged foliage at the end of the growing season or in early spring before new growth appears.
This helps maintain the plant's health and aesthetic appearance.
Propagation is primarily by division of rhizomes in late summer or early fall after the foliage has died back. Seeds are slow to germinate and require a specific stratification process, taking several years to reach maturity.
Repot Trillium underwoodii only when necessary, typically every 2-3 years, or when the plant becomes root-bound. Repot in late summer or early fall using a well-draining, humus-rich soil mix.
Handle the rhizomes carefully to avoid damage.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Underwood's Trillium (Trillium underwoodii)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Liliales |
| Family | Melanthiaceae |
| Genus | Trillium |
| Species | Trillium underwoodii |
Similar in genus Trillium
Answers based on plant encyclopedia data
