Thanks, Ron. Nadia asked me, and I thought something looked familiar about it, but I would never have remembered what. Garden Explorer has it as Poncirus trifoliata 'Flying Dragon', at the Pavilion, narrow ground level bed across from Arbour.
Ollitrault, Curk and Krueger indicate that the majority of data are consistent with the enlarged Citrus that includes the trifoliate orange, though they recognize that many botanists still follow Swingle.[11] Trifoliate orange - Wikipedia
