论文部分内容阅读
美丽向日葵,为菊科,向日葵属,学名 Helianthus,decapetaIus·L,原产北美,现在世界各地广为栽培,主要用以切花或园林栽培。我国台湾早有引种,但大陆栽培尚不多见。美丽向日葵是向日葵的兄弟,和洋姜(即菊芋)亦是兄弟,是多年生草本宿根花卉。茎直立,多分枝,底部叶片对生,上部叶片互生,从株高15cm 就开花,一直开到顶端,株高可达1.2m,叶片园长卵形,长7cm,先端尖,三出脉,边缘有粗大的锯齿,表面粗糙,头状花序单生枝顶,花径6至12cm,总包两列,舌状花鲜黄色,宽线形,长
Beautiful sunflowers, Asteraceae, sunflower, scientific name Helianthus, decapetaIus · L, native to North America, is now widely cultivated around the world, mainly for cut flowers or garden cultivation. Taiwan has long been introduced in China, but cultivation in the Mainland is still rare. Beautiful sunflower is a brother of sunflowers, and ginger (ie Jerusalem artichoke) is also a brother, perennial herbaceous perennial flowers. Stem erect, much branched, the bottom of the leaves opposite, the upper leaves alternate, flowering from the plant height of 15cm, has been open to the top, the plant height of up to 1.2m, the vane director oval, length 7cm, apex sharp, three veins, The edges have thick serrations, the surface is rough, the head of the flower head single, flower diameter 6 to 12cm, the total package of two columns, bright yellow tongue flowers, wide linear, long