Notholirion campanulatum is a bulbous perennial in the lily family (Liliaceae) that flowers in April to May. It originates from the Himalayas and suits open, well-drained sites. The plant prefers full sun to partial shade and fertile, neutral to slightly acidic soil that remains moist but drains freely. Use it where spring bulbs and low alpine plants are visible in a gravelly or stony setting.

Bell-flowered lily (Notholirion campanulatum) flowers in April to May and prefers full sun to partial shade in well-drained, fertile neutral to slightly.

Notholirion is a small Asian genus of bulbous plants in the lily family, Liliaceae. It is closely related to Lilium, but each individual flowers only once, and then dies after producing offsets.

Notholirion campanulatum

Bell-flowered Lily (Notholirion campanulatum) | Alpine Bulb

Notholirion hyacinthinum is a bulbous member of the lily family that produces a single flowering event before the parent bulb dies back and is replaced by offsets. It is native to the Himalayas and closely related to Lilium. The bulb is covered by a tunic and produces basal leaves through autumn and winter. Flowering occurs in April to May.

Notholirion hyacinthinum is a Himalayan bulb that flowers in April to May and produces offsets after flowering.

Notholirion hyacinthinum

Notholirion hyacinthinum | Himalayan spring bulb

Notholirion macrophyllum is a species of flowering plant in the lily family, Liliaceae. They are bulbous flowering plants originating in Asia.

https://en.wikipedia.org/wiki/Notholirion_macrophyllum

Notholirion macrophyllum

A bulbous perennial with narrow, grass-like leaves and erect stems bearing nodding, bell-shaped, pale lilac to purple flowers.