¹Department of Agrotechnology, Faculty of Agriculture, Universitas Sebelas Maret. Jl. Ir. Sutami 36A, Surakarta 57126, Central Java, Indonesia.

²Center for Research and Development of Biotechnology and Biodiversity, Universitas Sebelas Maret. Jl. Ir. Sutami 36 A Surakarta 57126, Central Java, Indonesia

³Department of Soil Science, Faculty of Agriculture, Universitas Sebelas Maret. Jl. Ir. Sutami 36A, Surakarta 57126, Central Java, Indonesia.

Email: tatik_oc@yahoo.com

Dendrobium is composed of 1600 kinds of sympodial epiphytic orchids. The genus is characterized by long pseudobulbs or canes with soft leaves over the entire length, or in some species, short or swollen pseudobulbs, ending in two leathery leaves. The inflorescence is terminal or near terminal, arranged into one to dozens of flowers with extremely different sizes, sizes and color ranges. The research purposes to identify the quantitative morphological character of five species of Dendrobium spp.: D. mirbelianum and D. bracteosum from Papua, D. lamellatum from Java, D. anosmum from South Kalimantan, and D. purpureum from North Sumatera were used as the materials on this study. The dendrogram results based on the similarity matrix are divided into two clusters, five species have 1.45 value of similarity coefficient. The first cluster is composed of D. mirbelianum only, the second cluster is composed of D. lamellatum, D. purpureum, D. bracteosum and D. anosmum which have more distant relationship with other three orchids on the second cluster. D. lamellatum and D. purpureum have the closest similarity coefficient with 0.89 value which have bigger chance to use the parents in hybridization.