Dahlia pinnata cav。
Years of grass, with huge sticks of root. Straight-up, multiple branches, 1. 5-2 meters tall, thick. The leaves one to three go back to the plume, with the upper leaf sometimes undivided, the pelvis or the long circle of eggs, which are green and have no hair on either side. Mexico is home to the world's most widely cultivated ornamental plants, with about 3,000 varieties. There are also many varieties in the country, which can be divided into single petals, fine petals, chrysanthemums, pomegranates, sphericals, etc. They are suitable for flower jars, run-off plants and other short-lived varieties. Duration june-december, fruit september-october. Darryl has a glucose in its roots and has the same efficacy as glucose in medicine。
Form characteristics
Da lixie
Years of grass, with huge sticks of root. Straight stand, multiple branches, 1. 5-2 metres high, thick 5. The leaves one to three go back to the plume, with the upper leaf sometimes undivided, the pelvis or the long circle of eggs, which are green and have no hair on either side。
The head is large, it has long crouples, it tends to fall down and it is 6-12 cm wide. There are approximately five outer layers of the pellets, egg-shaped ellipses, foliage, internal membranes, elliptical pins. Telecommunications 1 layer, white, red, or purple, permanent egg shape, with less visible 3 teeth at the top, or full locomotive; tubing yellow, in some cases all grown up as tongues。
Thin fruit long round, 9-12 mm long, 3-4 mm wide, black, flat, with two invisible teeth. Duration june-december, fruit september-october。
Growing habits
Requirements for light conditions
Dalaihua, with too much sunlight, has an impact on flowering, and light time is usually 10 to 12 hours, so that young children are raised in a way that avoids sunlight。
Da lixie
Requirements for temperature conditions
Da liao likes a cool climate, with the largest, most beautiful, most abundant in late september, but not frost, and the leaves of the frost immediately fade. Temperature requirements are not stringent during growth, 8 ~35 °c can grow and 15 ~25 °c is appropriate。
Water requirements
Dresses are drought- and flood-resistant, and the pellets are usually wet and wet, and can pour and drain (the ground is not often wet)。
Soil requirements
The flowers are suitable for planting in soil laxation and well-watered fertile sandy soils。
Distribution
Mexico, the world's most widely cultivated ornamental plant, was introduced in china at the beginning of the twentieth century and is now cultivated in several provinces。
Cultivation
