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美国凌霄为紫葳科凌霄属落叶藤本植物,原产于北美洲,我国各地多有栽培。美国凌霄枝干虬曲,攀缘能力强,花大色艳,是良好的垂直绿化材料。美国凌霄长可达10m,叶椭圆形至卵状长椭圆形,花数朵集生成短圆锥花序,花冠漏斗形,花冠外面橘红色,裂片鲜红色。花期6~8月,果期9~10月。美国凌霄喜光,略耐阴,有较强的耐寒能力,在华北地区可安全越冬,既耐干旱,也较耐水湿,对土壤要求不严,在轻黏土、壤土、素沙土中均能正常生长,但在肥沃深厚且通透性好的沙壤土中生长最好。有一定的耐盐碱力,在p H值8.8、含盐量0.3%的盐碱土中能正常生长。
Peak for the United States of America asparagus Lycium deciduous vine, native to North America, more than our own cultivation. The United States Peak twilight song, climbing ability, spend large color Yan, is a good vertical green material. Peak of the United States up to 10m, leaf oval to oval-shaped oval, flowers set to produce short panicles, corolla funnel-shaped, corolla orange-red, lobes bright red. Flowering from June to August, the fruit period from September to October. The United States Peak Hi light, slightly shade-tolerant, strong cold tolerance, safe winter in North China, both drought-resistant, but also more water-wet, less stringent requirements on the soil, in light clay, loam, sand can be normal Growth, but grow best in sandy loam with fertile depth and good permeability. A certain degree of salt and alkali resistance, in the p H value of 8.8, salt content of 0.3% saline soils can grow normally.