Trillium underwoodii aka Longbract Wakerobin

Trillium underwoodii has the common name long-bract wakerobin. It is part of the plant family Melanthiaceae. Its native range runs from Alabama to northern Florida. Kew lists it as a plant of temperate climates. The RHS states that it is not native to Britain. The same holds true for Ireland. These records thus place its native home outside both places. They name Alabama and northern Florida as the bounds of its range.

This species is a perennial, a plant that lives from year to year. It grows from a rhizome, a stem beneath the ground. That stem supports the plant as it grows. Kew uses the term rhizomatous geophyte to describe this growth form. This refers to its growth from a stem below ground. The supplied records give no mature height or spread for this species. Nor do they describe its leaf shape or leaf markings. They leave both its full-grown size and those leaf traits unstated.

Chicago Botanic Garden lists bloom times from March through June. Its record splits this span into two groups. One covers March–April, and the other covers May–June. The flower colors it lists are red, yellow, green, and purple. It does not say how these colors vary within the species. The record also gives no facts about fruit or seed. Its notes on blooms do not extend to those parts.

For growing this plant, Chicago Botanic Garden lists moist soil. It gives full sun and partial shade as suitable light levels. Its listed USDA hardiness range is zones 5–9. These details come from an archived plant record. The saved copy dates from before February 2022. The garden no longer updates that record. The soil, light, and zone details come from that older source, not a record it still updates.

The supplied evidence does not state what soil texture it needs. It gives no soil pH needs, either. There is no pest or disease guidance for this species. The sources also give no guidance on whether people can eat it. Nor do they state whether it is toxic. These gaps leave both its use as food and its safety unclear.