Exo-glycosidases Activities in Artemisia sphaerocephala Mucilaginous Achene Germination Process Ecological significance of fruit heteromorphism in the annual ephemeral Senecio subdentatus THE PRELIMINARY STUDY ON THE MICROMORPHOLOGICAL FEATURES OF ACHENE SURFACES OF SAUSSUREA Roles of Achene Mucilage in Defensing Freezing Injury for the Seed Germination of Mirabilis himalaica Supplementary description of achenes of seven species in Elatostema(Urticaceae) Micro-morphological Characteristics of Taraxacum F. H. Wigg. Seeds from Northeastern China and Taxonomic Significance 国产委陵菜属植物果实形态及其分类学意义 OBSERVATION OF THE FRUITS OF LACTUCA SATIVA AND ITS VARIETIES WITH AN ELECTRON MICROSCOPE The relationship between morphological structure of tubular florets and achene of sunflower and host plant selection of European sunflower moth BET HEDGING IN HETEROMORPHIC ACHENES OF HETERACIA SZOVITSII (ASTERACEAE), A DESERT EPHEMERAL Achene Wall Anatomy and Surface Sculpturing of Lactuca L. and Related Genera (Compositae: Lactuceae) with Notes on Their Systematic Significance Effects of Light and Temperature on Germination of Heteromorphic Achenes of Bidens frondosa L. Morphology and Germination Features of Achenes of 12 Species of the Genus Saussurea (Asteraceae) in Western Sichuan Plateau Achene Morphological Features of Saussurea subg. Eriocoryne (Asteraceae) and Its Taxonomical Significance* Exo-glycosidases Activities in Artemisia sphaerocephalaMucilaginous Achene Germination Process Micromorphological Features of Achene Surfaces of 16 Species Of Subgen Saussurea in the Eastern of the Qinghai-Tibet Plateau Seed Germination in Artemisia sphaerocephala I. the Structure and Function of the Mucilaginous Achene Comparison of Germination Strategies of Artemisia ordosica with Its Two Congeners from Deserts of China and Israel