Botanical Gazette, 第 48 卷

angiosperms Annals of Botany appear archegonia BOTANICAL GAZETTE breaking strength CaCl cell walls cent chromatin chromosomes condition cone Cordaitales culture curve Cycadales cycads cytoplasm daughter cell daughter nuclei described diameter divides division edule electrical elongation embryo sac endosperm evidence experiments fertilization formation four nuclei fusion gametophyte genera genus germination growth gymnosperms hard bast heterotypic hybrid increase integument leaf leaves longa longis longitudinal lower megaspore megaspore nuclei MgCl micropylar mitosis mother cell NaCl nucellus nuclei nucleolus number of bacteria number of chromosomes observed occur Oenothera organisms ovules Peperomia pileus plants plate pollen tube present pressure prothallus protoxylem reduction root seeds showing shown soil solution species sperms spindle spinulosum spirem spores sporophylls stage staining starch stem stipe strobili structure Synchytrium telophase temperature tension tion tissue tracheids tree usually Widdringtonia wood xylem zoosporangium zoospores