Morphological characteristics of Caragana arborescens

Small trees or large shrubs, 2-6 meters high; Old branches are dark gray, smooth, slightly shiny, branchlets are angular, pilose when young, green or yellowish brown. Feather compound leaves have 4-8 pairs of leaflets; Stipules are needle-shaped, 5- 10 mm long, and those with long branches fall off and rarely remain; Leaf rachis slender, 3-7 cm long when young, pilose; Leaflets are oblong-obovate, narrowly obovate or ovoid, with a length of 1-2(2.5) cm and a width of 5- 10( 13) mm, with blunt apex, sharp spines, broad wedge-shaped base and pilose when young or just below.

Pedicels in 2-5 clusters, each with 1 flower, 2-5 cm long, with nodes, bracteoles and bristles on the upper part; Calyx bell-shaped, 6-8 mm long and 7-8 mm wide, with short and wide calyx teeth; Corolla is yellow, with a length of1.6-20mm, the flag rhombus is wide and oval, almost equal in width and length, the tip is blunt, the pedicel is short and round, slightly longer than the flag petal, the pedicel is 3/4 of the petal length, the spike distance is 1/3 of the non-pedicel, the keel is slightly shorter than the flag petal, and the pedicel is larger than the petal. Ovary glabrous or pubescent. Pods are cylindrical, 3.5-6 cm long, 3-6.5 mm thick, and the top is tapering without hair. The flowering period is May-June and the fruiting period is August-September.

The plant size, leaf shape and size, flower number, pedicel length and hair density of Caragana arborescens in different habitats have great changes. There are some varieties of V.L.Komarov, such as f.typiakom. F. Obovatakom。 Dianthus acuminata Elaeagnus angustifolia In addition, there are many cultivated varieties.