grassy-leaved blue flower in SIGNA 80

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Tara Choate wrote an article in the Fall 2008 SIGNA (page 4011) which
she illustrated with a photo titled "juno group". On the far right of
this photo is a plant with tall skinny leaves. Pale blue flowers on a
branch from this plant arch over the short potted junos.

What is this?

Diane Whitehead