Syringa reticulata North America. Syringa reticulata Syringa reticulata (Japanese tree lilac; ; ) is a species of Lilac, native to eastern Asia: in northern Japan (mainly Hokkaidō), northern China (Gansu, Hebei, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, Ningxia, Shaanxi, Shanxi, Sichuan), Korea, and far southeastern Russia (Primorye). "Syringa reticulata" is a deciduous small tree growing to a height of 39' (12 m), rarely to 49' (15 m), with a trunk up to 11.8" (30 cm), rarely 15.7" (40 cm) diameter; it is the largest species of lilac, and the only one that regularly makes a small tree rather than a shrub. The
Rheum (plant) represented by about 60 extant species. Among species found in the wild, those most commonly used in cooking are the garden rhubarb ("R. rhabarbarum") and the so-called false rhubarb ("R. rhaponticum"), which is actually a true rhubarb. The many varieties of cultivated rhubarb more usually grown for eating are recognised as "Rheum" × "hybridum" in the Royal Horticultural Society's list of recognised plant names. The drug rheum is prepared from the rhizomes and roots of another species, "R. officinale" or medicinal rhubarb. This species is also native to Asia, as is the turkey rhubarb ("R. palmatum"). Another species, the Sikkim