Studies on Phenotypic Diversity of Vulnerable Rosa praelucens Endemic to Shangrila,Yunnan Comparative Study on the Breeding Systems of Rosa praelucens and Rosa soulieana Studies on Phenotypic Diversity of Vulnerable Rosa praelucens Endemic to Shangrila,Yunnan Distribution and Population Quantitative Dynamics of Critically Risked Rosa praelucens Byhouwer Comparative Study on the Breeding Systems of Rosa praelucens and Rosa soulieana Rosa praelucens ‘Gesang Hong’ and ‘Gesang Fen’ Rosa praelucens ‘Gesang Hong’ and ‘Gesang Fen’