Thin Petal Larkspur

General: Perennial from somewhat fleshy and tuberous roots, the stems 1.5-4 dm. tall, usually single and simple.
Leaves: Leaves few, long-petiolate, mostly basal, the blades 2-6 cm. broad, 2-4 times parted or lobed into linear or oblong-lanceolate segments 1.5-5 mm. broad; cauline leaves much reduced upward.
Flowers: Inflorescence simple or compound, the racemes 3-15 flowered; the lower pedicels several times as long as the flowers, spreading or ascending; sepals 5, pale blue, widely spreading,.. more