Amsonia tabernaemontana Walter var. salicifolia (Pursh) Woodson
Amsonia salicifolia Pursh
Bluestar, blue dogbane, blue star flower
Bluestar is native to the central United States. It prefers rocky woodlands and ravines, stream borders, limestone glades, and moist sandy meadows. This variety has narrower, willow-like leaves.
Plants: Perennial, 12-36" (30-91 cm), forming large clumps with many branches. Stems are light green, smoothly cylindrical, and hairless.
Flowers: In compact, rounded panicles. Each flower is tubular, opening to a star of five narrow pointed light blue petals ½-¾" (1.3-1.9 cm) around. Flower centers are pale yellow. They appear in May.
Fruits: Cylindrical seed pods are 3-4½" (8-12 cm) long, containing hard, black seeds. Pods are curved and sharp-tipped.
Amsonia tabernaemontana var. salicifolia at the Missouri Botanical Garden
Amsonia tabernaemontana at Illinois Wildflowers
Amsonia tabernaemontana on fyi.extension.wisc.edu (Great photos and info)
Amsonia tabernaemontana on plants.ces.ncsu.edu
Amsonia tabernaemontana at the Lady Bird Johnson Wildflower Center
Amsonia tabernaemontana var. salicifolia description by Thomas H. Kent, last updated 25 May 2020.
Range: Zones 3-9: