Carya cathayensis is produced all over the world with a wide variety. Juglandaceae plants are basically distributed in subtropical areas, with hundreds of species. China is one of the origins of hickory. Four varieties were produced in China, and other varieties were introduced into China from Southeast Europe and West Asia in the Han Dynasty. After hundreds of years of cultivation, the domestic varieties are completely different from those abroad.
China Carya cathayensis is mainly produced in Tianmu Mountain area at the junction of Zhejiang and Anhui. Zhejiang is famous for its Daoshi, Changhua and Yuqian in Lin 'an, Qi Lin and tangcun in Chun 'an, Xiaofeng in Anji and Fenshui in Tonglu. Lin 'an is one of the producing areas of Carya cathayensis in China. Carya cathayensis has been cultivated and utilized for more than 500 years. Linan's carnosine is well-known at home and abroad for its excellent quality of large grain, thin shell, full nuts, crisp and delicious.
Introduction of Morphological Characteristics of Small Walnut
Small walnut, also known as Carya cathayensis, is a deciduous tree with a height of 10-20m and a DBH of 30-60cm. The bark is smooth, gray and smooth; Branchlets are thin, and new branches are densely covered with peltate orange glands. Later, the glands gradually became sparse. 1 annual branches are purple-gray, the upper end is often sparsely pilose, and the lenticels are round and sparse.
The compound leaves are16-30cm long. When young, the petiole is covered with hairs and glands, then the hairs gradually fall off, and the leaf axis is densely covered with hairs, with 5-7 leaflets. The lobular margin has fine serrations, only the midvein, lateral vein and leaf margin are pilose when young, and the inferior vein has persistent or deciduous hairs and is covered with orange glands, and then the glands gradually become sparse; Petioles of lateral leaflets are short or almost sessile, opposite, lanceolate or obovate-lanceolate, sometimes slightly sickle-shaped, wedge-shaped or slightly rounded at the base, tapering at the top, long 10- 18 cm, and 2-5 cm wide. The petiole of the terminal lobule is about 5- 10 mm, which is the same as the upper lateral lobule.
There are three male catkins in the bundle of 1. The inflorescence axis is covered by hairs and glands, and it is 10- 15 cm long, which is born on the total stalk about 1-2 cm long. The total stem is born from the axils or bracts of the current branches. Male flowers have short stems; Bracts are narrow, oblong and linear, bracteoles triangular and oval, all covered by hairs and glands; Stamens 2-7, inserted on narrow receptacle, anthers hairy. The female spike is erect, and the inflorescence axis is densely glandular with 1-3 female flowers. Female flowers are ovoid or broadly elliptic, densely covered with orange glands, about 5-6 mm long, involucre lobes covered with hairs and glands, and the outer 1 piece (bract) is obviously long and subulate.
The fruit is obovate and the bottom gradually narrows. When he was young, he had four narrow wings and longitudinal ribs, which were densely covered with orange glands. When it matures, the glands become sparse and the longitudinal edges become inconspicuous. The exocarp is leathery after drying, about 2-3 mm thick, and divided into 4 petals along the longitudinal edge; The stone is obovate or oval-ovoid, sometimes slightly flat on the side, with four inconspicuous longitudinal edges, a sharp top with 1 short bumps, a length of 20-25mm and a diameter of15-20mm; Endocarp is hard, grayish yellow-brown, and 65438 0 mm thick; There is no gap between the diaphragm and the wall; Cotyledons 2 separate. It blooms in April-May and matures in September.