Corydalis bulbosa is a species in the genus Corydalis, placed in family Q144723, and is characterised by a spring flowering period. In the UK it flowers from April to June. Cultivation details vary across Corydalis species and cultivars, so check supplier information for precise siting and hardiness. Observe the plant through its April–June flowering to determine whether its habit and flowering suit your garden.

Corydalis bulbosa flowers in the UK from April to June, so check supplier labels for specific cultivation and hardiness guidance.

Corydalis is a genus of about 540 species of annual and perennial herbaceous plants in the family Papaveraceae, native to the temperate Northern Hemisphere and the high mountains of tropical eastern Africa. They are most diverse in China and the Himalayas, with at least 357 species in China.

Corydalis bulbosa

Corydalis chaerophylla is a species of Corydalis in the poppy family (Papaveraceae) that flowers in the UK from April to June. It sits within a genus of roughly 540 herbaceous annual and perennial species distributed across the temperate Northern Hemisphere and high mountains of tropical eastern Africa. Members of the genus are botanically unusual among dicots in having only a single cotyledon. Some Corydalis species are used as food plants by the larvae of particular butterflies and several contain alkaloids, so check supplier notes when sourcing plants.

Corydalis chaerophylla flowers in the UK from April to June and is a member of the Corydalis genus in the poppy family.

Corydalis chaerophylla

Corydalis ochroleuca is a perennial from south-eastern Europe with fern-like grey-green leaves and sprays of white flowers with yellow throats. It flowers in the UK from April to June, producing racemes above the foliage. It prefers partial to full shade and suits moist, well-drained soils. The foliage often remains through winter, providing low-level structure in shade.

Pale corydalis (Corydalis ochroleuca) bears white spring flowers with yellow throats and grey-green foliage, ideal for shaded, moist, well-drained spots.

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

Pseudofumaria is a genus of herbaceous perennial plants native to Europe, formerly included in the genus Corydalis.

Corydalis ochroleuca

Pale corydalis | Corydalis ochroleuca

Corydalis ophiocarpa is a species in the genus Corydalis, placed in the family Papaveraceae, that flowers in the UK from April to June. Its spring flowering window is its most reliable identifying and horticultural feature. Exact habit and cultivation needs vary between Corydalis taxa, so consult the plant label or supplier notes for specifics. Time any deadheading or seed collection to the April–June flowering period.

Corydalis ophiocarpa flowers in the UK from April to June and belongs to the genus Corydalis in the Papaveraceae.

Corydalis ophiocarpa

Corydalis scouleri is a perennial herb native to British Columbia that produces a spring display from April to June. It suits partial shade or shade and favours moist, well-drained, humus-rich soil. Plant it where it can sit quietly in the shade layer, such as beneath shrubs or among woodland bulbs.

Scouler's fumewort (Corydalis scouleri) prefers moist, humus-rich, well-drained soil in partial shade and flowers April to June.

Corydalis scouleri

Scouler's fumewort | Corydalis scouleri

Corydalis thalictrifolia is a herbaceous species placed in the genus Corydalis within the poppy family (Papaveraceae) and flowers in the UK from April to June. The genus contains both annual and perennial herbs and is especially diverse in China and the Himalayas. Corydalis species are ecologically significant as food plants for some butterfly larvae and several members of the genus contain alkaloids that can be toxic.

Corydalis thalictrifolia is a Corydalis species that flowers in the UK from April to June.