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- Physocarpus intermedius (category Physocarpus)intermedius Rydberg N. L. Britton, Man. Fl. N. States, 492. 1901 Synonyms: Physocarpus opulifolius var. intermedius (Rydberg) B. L. Robinson Treatment appears in FNA4 KB (394 words) - 23:57, 5 November 2020
- Physocarpus capitatus (category Physocarpus)Spiraea capitata Pursh Fl. Amer. Sept. 1: 342. 1813 Synonyms: Physocarpus opulifolius var. tomentellus (Seringe) B. Boivin Treatment appears in FNA Volume4 KB (353 words) - 23:57, 5 November 2020