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CORYDALIS curviflora var. rosthornii
Curveleaf Fumewort, Fumewort, Rosthorn's Curveleaf Fumewort
A beautiful but hard-to-please plant, this herbaceous perennial from high altitudes in northern Sichuan needs moderate summers to succeed. Growing from a cluster of fat storage roots, it forms clumps of ferny-leaved, calf-high stems topped by conical sprays of 6 to 18 fragrant sky-blue flowers. Flowering begins in late spring and continues until fall if conditions remain moist and cool. The blooms have two outfacing lips and a broad upcurved spur. Plants go dormant and may perish in summer heat and drought. If happy, they spread to form large clumps.
This perennial requires full sun to light shade and moist, well-drained, fertile, cool soil. Protect it from hot sun. It is an ideal candidate for a peat bed or similar sites in high-latitude or high-altitude gardens. Look for the cultivar 'Blue Heron,' with gray-green leaves and sapphire-blue flowers.
5 - 1
6 - 8
2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Full Sun, Partial Sun
4"-10" / 10.2cm - 25.4cm
10"-15" / 25.4cm - 38.1cm
Late Spring, Early Summer, Summer, Late Summer, Early Fall, Fall
Spring, Summer, Fall
Mixed Border, Rock Garden / Wall
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