Slope-related variations in twig and leaf traits of Robinia pseudoacacia in the northern mountains of Lanzhou Bioactive Constituents from Twigs and Leaves of Kopsia hainanensis Changes of Nutrient Concentration During the Decomposition Process of Oak Twigs Allometric Characteristics of Terminal Twigs of Tamarix ramosissima and Haloxylon ammodendron Alkaloids from Securinega suffruticosa Changes of some major and micro nutrients during the decomposition process of oak twigs Chemical Constituents from Twigs of Trigonostemon lutescens (II) Identification and antifugla activity of the antagonistic bacteria of Cytospora spp. Chemical constituents from twigs of Myricaria bracteata