Answer: Bells of Ireland is an interesting pale green/creamish flower. Snow-on-the-Mountain (Euphorbia marginata) has striking foliage that combines white and green. For white/cream, try stock, flowering tobacco (Nicotiana), Bishop's flower (Ammi majus) which is similar to baby's breath, white bachelor's button, phlox, cosmos, China aster (Callistephus chinensis), and Love-in-a-Mist (Nigella damascena).
By the way, a great reference for flower gardeners is "Sunset Annuals: Quick Color and Beauty for your Garden." It includes a table with flowers listed by color and blooming season.
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