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Spiraea lucida, Spiraea prunifolia, Spiraea salicifolia, Spiraea splendens, Spiraea stevenii, Spiraea thunbergii, Spiraea tomentosa, Spiraea virginiana

whether Spiraea ×vanhouttei had been proven to be the hybrid S. cantoniensis and S. trilobata. C. Sterling (1966) described the carpel anatomy of S. ×vanhouttei;