In addition, all of the filaments of "Deutzia crenata" are toothed. Here some extensive collections have been created of "Hydrangea", azalea, "Deutzia" and other genera. Its peak bloom is in May, with the dogwoods, azaleas, lilacs, deutzia and crabapples. "Deutzia crenata" is a deciduous shrub. Deutzia ningpoensis is a shrub in the family Hydrangeaceae. The gardens contain the National Plant Collections of Lilac, Deutzia, Hosta and Hemerocallis. Deutzia gracilis, the slender deutzia, is a plant in the hydrangea family, Hydrangeaceae. "Deutzia scabra" is used by joiners in Japan to polish wood. "Deutzia scabra" is a deciduous shrub growing 1-2 meters in height. Deutzia crenata is a species of flowering shrub in the hydrangea family (Hydrangeaceae). "Deutzia gracilis" is a shrub with opposite, simple leaves, and slender, arching stems. "Deutzia" is named after the 18th century Dutch patron of botany, Johann van der Deutz.