What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
absorbed absorption alcohol amount apparatus appears assimilation atmosphere become Botanische buds bundles carbonic acid cell-wall cells cellulose cent changes chemical chlorophyll chlorophyll granules color coloring-matter containing cotyledons cutinized Darwin dicotyledons dilute dissolved Drosera ducts effect embryo endosperm epidermis evaporation examined experiments fertilized fibres fibro-vascular flowers gases germination given glands glass grains green growth hairs inches increase instance iodine known layer leaf leaves light liquid lower plants mass matters micellae microscope minute moisture monocotyledons movement nitric acid nitrogen nucleus observed oosphere organs ovule oxygen parenchyma petiole Pfeffer plants pollen pollen-grains pollen-tube potassic produced protoplasm radicle rays reagents respiration roots Sachs seedlings seeds self-fertilized sensitive shoot shown side soil soluble solution sometimes species specimen stareh stem stoma stomata structure substance sugar surface takes place temperature tion tissues transpiration tube vegetable volume wall wood woody yellow Zeitung
Page 395 - With these facts before us, there seems little difficulty in understanding how a radicle penetrates the ground. The apex is pointed, and is protected by the root-cap ; the terminal growing point is rigid, and increases in length with a force equal, as far as our observations can be trusted, to the pressure of at least a quarter of a pound, probably...