Differences in morphological characteristics:
Morphological characteristics of Pinus thunbergii
Trees, 30 meters high and below 2 meters in diameter at breast height; The bark of young trees is dark gray, and the bark of old trees is gray-black, thick and broken into pieces. Branches are spreading, and the crown is broadly conical or umbrella-shaped; Annual branches are light brown and glabrous; Winter buds are silvery white, cylindrical, ovoid or cylindrical, with sharp tips, lanceolate or strip-lanceolate bud scales and white filiform edges. The needles are a bundle of 2 needles, dark green, glossy and thick, with a length of 6-12cm and a diameter of1.5-2mm, with fine serrations on the edge and air holes on the dorsal surface; One or two layers of subepithelial cells are continuously arranged in the cross section, and there are two or four layers at two corners, and the 6- 1 1 resin channel is medium.
Male cones are reddish brown, cylindrical, 1.5-2 cm long, clustered in the lower part of new branches; Female cones are solitary or 2-3 clusters near the top of new branches, erect, pedunculate, ovoid, lavender or brownish red.
The cones are green before ripening, brown after ripening, cone-shaped ovoid or ovoid, 4-6 cm long and 3-4 cm in diameter, with short stalks and drooping; The middle seed scale is oval, the scale shield is slightly thick, the transverse ridge is obvious, the scale navel is slightly concave and the thorns are short; The seeds are obovoid, with a length of 5-7 mm, a diameter of 2-3.5 mm, a wing length of 1.5- 1.8 cm, and the seed wings are grayish brown with dark stripes; Cotyledons are 5- 10 (mostly 7-8), 2-4 cm long, primary leaves are strip-shaped, about 2 cm long, with sparse short bristles on the leaf margin, or nearly entire. The flowering period is from April to May, and the seeds mature in the second year of 10.
Morphological characteristics of Pinus pentaphylla
Evergreen tree The bark is grayish brown, the old trunk has irregular scaly peeling, the endothelium is reddish brown, the annual branchlets are light brown, densely yellow, and the winter buds are oval and yellowish brown. Short leaves, five needles in a bunch. There are white stomatal lines on both sides of the inside. Flowering in May, the cones are unisexual, the male cones gather at the lower part of the new branches, and the female cones gather at the end of the new branches. The cones are oval. The following year 10 ~ 1 1 The seeds are mature, with obovate, triangular wings and light brown.
Differences in ecological habits:
Ecological habits of black pine
Light-loving, drought-resistant, barren-resistant, waterlogging-resistant and cold-resistant. It is suitable for growing in a warm and humid maritime climate zone, and it is most suitable for growing in sandy soil with deep soil layer, loose soil and humus. Because it is resistant to sea fog and sea breeze, it can also grow in saline soil by the sea. Strong insect resistance, slow growth and long life. Black pine is evergreen all year round and has strong resistance to pests and diseases. It is the first choice for greening barren hills and roads.
Ecological habits of American ginseng
There are about 30-40 varieties. Xi yang, slightly resistant to yin, but avoid excessive yin. Cold-tolerant, but afraid of heat. I like deep, dry and well-drained acidic soil, and avoid water accumulation. When the soil is too wet or poorly ventilated, it will affect growth and even lead to death.
Differences in main producing areas:
The main producing areas of black pine
Native to the south coast of Japan and South Korea. China Lushun, Dalian, Shandong coastal areas and Mengshan mountainous areas, as well as Wuhan, Nanjing, Shanghai, Hangzhou and other places for introduction and cultivation. Tashan Mountain in the east of Mengshan Mountain in Shandong Province has been used for afforestation for more than 60 years, and it is growing vigorously. It is used for afforestation in the northern coastal areas of Zhejiang Province and grows well.
The main producing areas of five-needle pine
Made in Japan. China has introduced 100 years.