Hibiscus syriacus 'Blue Bird' (often listed improperly as one word as 'Bluebird'), also known by its French name 'Oiseau Bleu,' is a popular heirloom shrub, possibly the most commonly gardened variety of Rose of Sharon Hibiscus.It produces a nearly true-blue pale to medium-dark blue flower, only slightly edging into lavender. It is navy blue & magenta at the bottom of the throat with large white to creamy white to pale yellow stamins.