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Studies on Classification for Cultivars of Canna L.

HUANG Guo-tao~(1,2), OUYANG Di-mei~2, XIANG Qi-bai~(1*), ZHU Wei-hua~2( 1.College of Landscape Architecture Nanjing Forestry University, Nanjing 210037,China;2. Shenzhen Urban Garden Administration, Shenzhen 518035,China)  
The existing various canna cultivars classification systems varying in criterion, make many disadvantages in international business. A new classification system was proposed based on the ICNCP. The morphological characteristics of petal, staminodes and folia were considered as the prerequisite criterion in species classification. Using height as the second degree criterion in groups classification. Comor of leaf and flower, size and shape of flower were used in cultivars classification. According to this system, 66 individuals were divided into 5 species or hybrids, 6 cultivar-groups, 66 cultivars. The three-degree system is simple and effective, measuring up with international routine. It can not only reflect the morphological characteristics of species and cultivar-groups, the origin of cultivars, but also point out the special purpose of every group in landscape design.
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