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. Reeves, P.A. Forsline, P.L. 2009b Genetic diversity and population structure in Malus sieversii , a wild progenitor species of domesticated apple Tree Genet. Genomes 5 339 347 Robinson, J.P. Harris, S.A. Juniper, B.E. 2001 Taxonomy of the genus Malus

, Beijing, China Qian, G.Z. 2005 Taxonomic study of Malus Mill. Nanjing Forestry University, Nanjing, China Royal Horticultural Society 2007 RHS colour chart. 5th ed. Royal Horticultural Society, London, UK Spongberg, S.A. 1996 Cultivar name registration

detailed studies on the genetic diversity of P. mira based on pollen morphology or the molecular markers. Generally, the pollen features of a plant can be used as markers of inheritance in taxonomic researches. In other words, we can identify plants from

and a pot plant. In the landscape, it grows 0.9 to 1.8 m in height with a similar spread, and flowers in early to mid summer. As a florist's crop, it is forced into bloom in a greenhouse, usually in time for Easter and Mother's Day sales ( Bailey, 1989

Viburnums (Genus Viburnum L.; Family Adoxaceae E.Mey., nom. cons.) comprise a diverse genus with ≈160 species and taxa found primarily in the northern temperate regions of the Americas, Europe, and Asia [ U.S. Department of Agriculture (USDA

provide a fast and accurate determination of nuclear DNA content that is related directly to ploidy level (among closely related taxa) and can be used as a taxonomic tool ( de Laat et al., 1987 ; Doležel, 1991 ; Doležel et al., 1998 ; Galbraith et al

( Dunal, 1839 ) when originally collected and deposited at the U.S. Department of Agriculture-Agriculture Research Service (USDA-ARS) National Clonal Germplasm Repository (NCGR) (Corvallis, OR). Further taxonomic study by one of the current authors (J

., Clackamas, OR) as a 5-s quick dip, and then were stuck in 7.9 × 7.9 cm plastic pots filled with a substrate of milled pine bark and perlite (2:1, v:v). Cuttings were placed on a propagation bench in a glass greenhouse and received a mist frequency of 4 s

, B. Zheng, Y.P. Hong, S.S. Lu, H.F. 2012 Floral morphology resolves the taxonomy of Camellia L. (Theaceae) sect. Oleifera and sect. Paracamellia Bangladesh J. Plant Taxon. 19 2 1124 1142 Karasawa, K. 1932 On triploid Thea Bot. Mag. Tokyo 46 458

and her colleagues have collected from the Pacific basin, South America, Europe, and Asia. The crop wild relatives are of interest taxonomically as well as for improvement in plant adaptation to cold and warm environments, yield, and antioxidant