Tricyrtis formosana aka Toad Lily

Tricyrtis formosana, or Formosan toad lily, belongs to the lily family. Its native range runs from Iriomote Island to Taiwan. In Taiwan, it grows in shaded woods, thickets, and roadsides. This herbaceous perennial loses its leaves for winter. Upright stems rise from rhizomes that spread beneath the soil. They form close clumps and can build colonies without becoming invasive.

Garden plants reach about 2–3 feet [0.6–0.9 metres] tall. Some stems reach 3.3 feet [1 metre]. Clumps spread to about 2 feet [0.61 metres] across. Green stems bend in a zigzag and bear fine hairs. The glossy, dark green leaves have clear, parallel veins. Their shapes range from lance-like to broader near the tip. Fine hairs cover their undersides, and their bases clasp the stems. Leaves can reach 0.5 feet [0.15 metres] long.

The small flowers have a star-like shape and six tepals. White tepals carry dense purple-red spots around a yellow throat. Three pouch-like nectaries sit at the base of the tepals. Loose, branched flower groups form mainly at the stem tips. Some also grow where upper leaves meet the stems. Bloom falls chiefly from late summer into early autumn. Chicago records a wider season from July through October. Bees pollinate the flowers, and hummingbirds visit for nectar. Cylindrical capsules follow, then split to release small, flat, papery seeds.

Give this plant moist, humus-rich soil with good drainage. Slightly acid soil suits it, though neutral soil also works. Do not let the soil dry out. Partial shade offers a sound choice across the sources. Some sources also support full shade, but NC State warns against deep shade. Strong sun can scorch the leaves. Chicago lists USDA zones 4–9; the RHS gives H5. A sheltered site helps flowers open before frost in cold areas. The RHS suggests deep winter mulch where cold comes without snow.

Use it beside paths, in shaded borders, or beneath shrubs. Containers and woodland ground cover are other uses. Close viewing makes the small flower details easier to see. The stems also supply cut flowers. Care needs are low, and serious problems are uncommon. Slugs and snails may feed on the plant. Rabbits eat new shoots, while deer tend to avoid it. Aphids can spread a virus that changes flower colour. Anthracnose can cause orange marks on stems and leaves. Watering at soil level helps keep foliage dry.