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大丽花又名大理花、大丽菊、西番莲、天竺牡丹、地瓜花、洋芍药,为菊科大丽花属多年生草本植物,原产墨西哥及危地马拉海拔1500米以上的山地。世界各地均有栽培,我国各地园林中也多有栽培。一、基本特征1.形态特征大丽花是多年生草本植物,株高1.5～2.0米,地下肉质块根膨大呈椭圆形,茎粗最大可达8～9厘米,多分枝,叶大,羽状分裂,上部叶有时不分裂,单叶对生,少数品种叶互生、轮生、异对生,头状花序平生,斜或略垂,花序直径5～35厘米,由中心的管状花即中盘花外围的舌状花组成。花期6～10月,瘦果长椭圆形,种子黑褐色。
Dahlia, also known as Dali flower, Dahlia, Passiflora, Pelargonium, sweet potato flowers, foreign peony, asparagus dahlia perennial herb, native to Mexico and Guatemala at an altitude of 1500 meters above the mountain. There are cultivars all over the world, and there are also many cultivars in gardens all over China. First, the basic characteristics 1. Morphological characteristics Dahlia is a perennial herb, plant height of 1.5 to 2.0 meters, the underground fleshy roots swollen oval-shaped, stem up to a maximum of 8 to 9 cm, multi-branched, large leaves, feather-like split, the upper Leaves sometimes not split, single leaves opposite, a few species leaves alternate, whorled, opposite, head inflorescences, oblique or slightly vertical, inflorescence diameter of 5 to 35 cm, Tongue flower composition. Florescence 6 ~ October, achenes oval, seeds dark brown.