Elm, also known as elm, elm, elm and elm, is the samara of elm. Shaped like money but small, the color is a string of white. It is named because it is round and as thin as a coin. Because it is the homonym of "surplus money", there is a saying that you can have "surplus money" after eating the money. Although the roots of elm are unremarkable, they are rich in nutrition.

Produced in China, distributed in cold temperate zone, temperate zone and subtropical zone, it is edible, medicinal and green.

morphological character

Elm is a deciduous tree, with a height of 25m, DBH 1 m, and grows into a shrub on arid and barren land. The bark of young trees is smooth, grayish brown or light gray, and the bark of big trees is dark gray, irregular, deep and rough; Branchlets are glabrous or hairy, yellowish gray, brownish gray or gray, sparsely brownish yellow or yellow, with scattered lenticels, no expanded cork layer, and raised cork wings.

Winter buds are nearly spherical or ovoid, the back of bud scales is hairless, and the edge of inner bud scales is white villous.

The leaves are elliptic-ovate, oblong-ovate, elliptic-lanceolate or ovate-lanceolate, 2-8 cm long and 1.2-3.5 cm wide. The top is tapered or long-tapered, the base is inclined or nearly symmetrical, one side is wedge-shaped to round, and the other side is round to semi-heart-shaped. The leaves are smooth and hairless, and the back of the leaves is pubescent when they are young, and then they become hairless or have tufted hairs in the axils of some veins, with heavy edges.

Flowers open leaves first, and the branches and leaves are axillary last year. Samara is nearly round, sparsely obovate, round, long 1.2-2 cm, and hairless except for the top-cut stigma.