Juglandaceae

Gemine leaves plants golden wisp of Maya Gang's
1
section, deciduous or semi-evergreen or evergreen trees, feathery re-leaf, no leaves, usually in the young part of the orange-yellow shield-shaped round gland scales; Mediated pollination; male flowers are often soft-shaped, singular or several bundles, female flowers are spiked or thin-shaped; male peanuts are found in
1
non-splitting or
3
-cracked flakes, usually with

2
small slivers or
1
to
4
flower pieces, male
3
to
40
pieces were planted on the flower
2
Small slivers and
2
to
4
flowers were planted in the sub-room, which consists of
2
heart skins; the fruit is a fake nuclear fruit or nut; the seeds are completely filled with fruit, with
1
layer membrane seed skin, no endosperm. Wood hard, is a better hardwood tree species, most types are rich in tannins, is the raw material for the extraction of tannins, seeds generally contain oil. There are


72,
species in the world, spread intermittently in Eurasia and the Americas, with the largest varieties from southern China to the Central and Southern Peninsulas and southern United States to Central America. It is a northern temper zone, but has a wide range of adaptability to subtropical and tropical climates. China's
7
belongs to
29
species, most of which are distributed in the low mountains south of the Yangtze River to the mountain forests in the Zhongshan area or on both sides of the valley, and a few species are distributed to the north.The earliest fossils of the undergraduate plant were found in the late Cretaceous and Paleo-Neo-tract formations in Europe and North America, so its origin should date back at least to the late Cretaceous, possibly in the early Cretaceous. According to the fossil record, from the 1990s to the Mesothococ, it spread across the northern hemisphere and reached high latitudes such as Greenland and Alaska, while the northern boundaries of modern distribution ranged only from
46
to
49 degrees north of Eurasia and North America
. Due to the glacial effects of the end of the Third and Fourth Eras, much of the northern hemisphere was subjected to ice sheets, and like most plants, walnut plants be extinct in northern Europe and North America, only preserved at comparable latitudes in east And North America, forming a modern intermittent distributed pattern.have a common ancestor with the matail tree, and are a more evolved group of golden plums.undergraduate
2
Yaco: (1)
Platycaryoideae
) Only the genus
Platycarya
)
1
belongs to East Asia. (2) Walnut Yaco (
Ju-Glandoideae
) is divided into: Huang Yi (
Engelhardieae
), Walnut (
Jug
-
landeae
) and Pecan (
Hicorieae
).undergraduate representative species are:huangis a more primitive species. Semi-evergreen shrubs, all hairless, bare buds, small branches gray-brown, even feathery compound leaves, there are
3
to
5
pairs of small leaves, small leaf side veins
10
to
13
pairs, flakes
3
split, fruit increase, to the fruit base. It is distributed in the tropical and subtropical mountain forests of southern and southwestern China, as well as the central and southern peninsulas. Bark fiber quality is good, can make artificial cotton, tanning content of
5.79
to
8.52
%, can beglue.fragrant tree is a small tree with deciduous leaves, odd plume-shaped compound leaves, small leaves
7
to
23
; The sequence is arranged at the top of the small branch into an umbrella room-shaped bouquet, the two sexes usually
1
is born at the center of the top, the female flower sequence is located in the lower part, the male flower sequence part is located in the upper part; Located in the middle and lower reaches of the Yellow River in China, as well as in Japan, Korea and northern Vietnam; Branches can peel fiber, hemp rate of
19.7
%, bark and fruit sequence rich in tantacerine, fruit sequence content is the highest, up to
11
to
31
%;maple poplar is a large tree, leaves are mostly even or odd feathery compound leaves, leaf shaft wings; fruit sequence length
20
to
45
cm, fruit
2
leather wings developed by small flakes, fruit fins narrow, tilted forward or "
V
" shape. Produced in Shaanxi, Hebei, Shandong and other parts of southern China, mostly born along the xixi River beach, wet hillside forest, has been widely used as garden trees or road trees;Qing Qianliu is a unique species in China, produced in the provinces south of the Yangtze River, star scattered growth at an altitude of
500
to
2,500
meters in the humid forest in the mountains, this species of male peanuts in the apparent radiation symmetry of the flat flower top, the fruit has horizontal round or near-circular fruit wings.walnutis a woody oil plant widely cultivated in southern Europe, West Asia, Central Asia and East Asia. Nuclear kernel oil content of up to
58
to
75
%, containing
protein
15
to
20
%, five carbon sugar
1
to
1.5
%, has a very high nutritional value. China's mountainous and hilly areas are widely cultivated, happy to be born in fertile and moist sandy loam.pecan is a unique species in Zhejiang and Anhui, China, the fruit is a famous dried fruit, the yield of
43
to
49
%, the yield of nuts reached
70
to
74
%, containing
18.3
% protein and rich
vitamin
, can be raw food, can also squeeze cooking oil. At present, there are more cultivation in northwest Zhejiang and southeastern Anhui, and they grow best in the sheltered areas with deep soil layer and better moisture conditions.。