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Figure 3 The clove cherry (Prunus apetala) has a clove-shaped calyx and is best classified close to the Fuji cherry (Prunus incisa). Photo by author, 13 April 1997, Yuki * Experimental Station of the Flower Association of Japan, Ibaraki Prefecture.
Ingram (1942) traced the following hybrids from his cherry seedlings with Prunus incisa as one parent and P. sargentii, P. serrulata var. speciosa, P. serrulata var. spontanea, and P. serrula var. tibitica as the other. The latter cherry gave hybrids with P. serrulata var. spontanea and with a garden variety of P. serrulata as well. Ingram further reported hybrids from crossing P. canescens with P. avium (Hillier?). By keeping pollen he procured vigorous hybrids of P. incisa and P. campanulata and reported a hybrid from crossing P. Ă—yedoensis with P. campanulata. Ingram also procured seeds