Armeniacamume var. tortuosa T. Y. Chen et H. H. Lu, also known as Yudi Longyoumei, belongs to the rose family, Longyoumei (a plum) deciduous shrub or small trees. Stem rod naturally twisted, straight up and oblique, old dry gray-brown, no branches, branchlets light green, half of the sprinkled dark gray-purple-brown halo spots; leaves ovate alternate, first flower after leaf; flowers 1-2, individual 3 flowers born on medium, short and Cambodian branches; flowers are dish-shaped 4 layers, layered thinly, milky white, petals 16-25, petals often wave-shaped undulating, sepals 5-6, flat to slightly retrograde, calyx pale green, most of the covered by brown; yellow stamens are longer, buds are obovate oblate, often porous in the center, extremely light fleshy red; sweet; flowering from mid-January to early March.
