Corydalis vaginans

Corydalis vaginans is in the poppy family, Papaveraceae. Its home range runs from northeastern Pakistan to northwestern Nepal. Kew places it in subalpine or subarctic climates. The RHS says it is not native to Britain and Ireland. It also lists Corydalis ramosa as a synonym, or another name. The sources do not agree on its life cycle. Kew calls it a perennial, which lives for several years. Plants For A Future calls it annual or biennial. These plants live for one or two years. Its lifespan in gardens thus remains unclear.

Plants For A Future lists blooms in July and August. Each flower has both male and female organs. Bees pollinate the flowers. The plant is also self-fertile. This means it can set seed with its own pollen. The evidence does not state this species' flower colour. It gives no account of its fruit. Nor does it give a sound height or spread. The records do not describe its leaf shape, stems, or roots.

Plants For A Future favours moist soil that drains well. It lists both sand and loam as suitable soils. It favours light soil rather than heavy ground. The plant can grow in light shade or full sun. Light shade in woods fits its stated need for semi-shade. The soil can range from slightly acid to slightly alkaline. The source lists USDA zones 4–8. It gives a UK zone number, but no RHS hardiness rating.

Plants For A Future suggests gardens in woods and peat beds. It also suggests beds worked for growing plants. These sites suit its stated need for moist soil that drains well. Its seed advice is to sow outdoors in spring. Keep seeds on the soil surface where they will grow. The source does not flag this plant as weedy. The evidence names no pests or diseases specific to this species. It gives no basis to judge growth speed or ease of care.

Plants For A Future lists no known food uses. It gives the plant an edibility score of zero. This score does not show that the plant is safe. The source notes a past use of sap for eye ailments. This does not show that the treatment works or is safe. The evidence gives no findings on this species' toxicity. The same source lists no other known uses.