Plant-life: Popular Papers on the Phenomena of BotanyM. Japp, 1881 - 216 páginas |
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Página 5
... bodies , each provided with two cilia or hair - like appendages , by the constant lashing of which they propel them- selves through the water . When the protoplasm becomes thus broken up , the cell - wall opens and sets them free , each ...
... bodies , each provided with two cilia or hair - like appendages , by the constant lashing of which they propel them- selves through the water . When the protoplasm becomes thus broken up , the cell - wall opens and sets them free , each ...
Página 20
... bodies known as ' zoospores , ' so named because they are furnished with two lash - like tails , and are capable of moving rapidly about like animalcules . This rapid movement usually lasts for about half an hour , and ( like the dust ...
... bodies known as ' zoospores , ' so named because they are furnished with two lash - like tails , and are capable of moving rapidly about like animalcules . This rapid movement usually lasts for about half an hour , and ( like the dust ...
Página 21
... bodies come in contact , and the antheridium pushes out a small tube which enters the cell - wall of the oogonium , and through it a portion . of the antheridium contents is emptied into the oogo- nium . This fertilises the oospores ...
... bodies come in contact , and the antheridium pushes out a small tube which enters the cell - wall of the oogonium , and through it a portion . of the antheridium contents is emptied into the oogo- nium . This fertilises the oospores ...
Página 41
... body or head . The stigmas and anthers are usually so placed that on visiting the next flower the pollen on the insect comes into contact with the stigma , and is detached . H- A St- In some cases the stamens and stigmas do not ripen at ...
... body or head . The stigmas and anthers are usually so placed that on visiting the next flower the pollen on the insect comes into contact with the stigma , and is detached . H- A St- In some cases the stamens and stigmas do not ripen at ...
Página 46
... 54 shows the wings depressed and the pollen being forced out from the tip of the keel against the bee's body . When the pollen is all exhausted the stigma is protruded in the 46 THE FERTILISATION OF FLOWERS . [ CHAP .
... 54 shows the wings depressed and the pollen being forced out from the tip of the keel against the bee's body . When the pollen is all exhausted the stigma is protruded in the 46 THE FERTILISATION OF FLOWERS . [ CHAP .
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Términos y frases comunes
animal antheridia antherozoids anthers archegonia bear beautiful bees Berberry branches called cell-wall Chapter Chara chlorophyll cilia Club-moss colour conidia consists containing corolla delicate Desmids Diatoms Ecidium Equisetum sylvaticum feet fernery ferns fertilisation filaments flowers fluid fronds fruit Fucus fungi germinating give graminis green grow growth heath herb honey hypha hyphæ Illustrations inches insects Isoëtes JAPP AND COMPANY'S known labellum large number leaf leaves lichen MARSHALL JAPP microscope moisture mosses mould Mucor mycelium Nature number of cells oogonium Orchis oxygen Penicillium Peronospora petals pistil pitcher pitcher-plant plants pollen pollen grains pollinia ponds Potato fungus produced prothallus Protococcus protoplasm Puccinia rain-water readers remarkable resemblance roots says Scale-moss seeds seen self-fertilisation set free side species specimens Sporange sporangia spores stalk stamens starch stem stigma substance surface tion Torula trees tube vegetable whilst wood zoospores
Pasajes populares
Página 151 - Meek creatures! the first mercy of the earth, veiling with hushed softness its dintless rocks; creatures full of pity, covering with strange and tender honor the scarred disgrace of ruin, — laying quiet finger on the trembling stones, to teach them rest.
Página 106 - If I wish for a horse-hair for my compass-sight I must go to the stable; but the hair-bird, with her sharp eyes, goes to the road. Immortal water, alive even to the superficies. Fire is the most tolerable third party. Nature made ferns for pure leaves, to show what she could do in that line.
Página 88 - When the bee, thus provided, flies to another flower, or to the same flower a second time, and is pushed by its comrades into the bucket and then crawls out by the passage, the pollen-mass necessarily comes first into contact with the viscid stigma, and adheres to it, and the flower is fertilised.
Página 151 - And, as the earth's first mercy, so they are its last gift to us. When all other service is vain, from plant and tree, the soft mosses and gray lichen take up their watch by the headstone.
Página 124 - If a man walk in the woods for love of them half of each day, he is in danger of being regarded as a loafer; but if he spends his whole day as a speculator, shearing off those woods and making the earth bald before her time, he is esteemed an industrious and enterprising citizen.
Página 116 - She is the fairies' midwife, and she comes In shape no bigger than an agate-stone On the forefinger of an alderman, Drawn with a team of little atomies Athwart men's noses as they lie asleep : Her waggon-spokes made of long spinners...
Página 54 - Moth-traps and spring-guns set on these grounds," might be the motto of the Orchids. There are baits to tempt the nectar-loving Lepidopteru, with rich odours exhaled at night, and lustrous colours to shine by day ; there are channels of approach along which they are surely guided, so as to compel them to pass by certain spots; there are adhesive plasters nicely adjusted to fit their probosces, or to catch their brows ; there are hair-triggers carefully set in their necessary path, communicating with...
Página 8 - The picture he gives us here of the Enticknapp household, with its Moravian and Quaker traditions, is one nearly perfect of its kind for sobriety of taste and freedom from all sentimental exaggerations.
Página 128 - But how important an element enclosure is, I plainly saw near Farnham in Surrey. Here there are extensive heaths, with a few clumps of old Scotch firs on the distant hill-tops ; within the last ten years large spaces have been enclosed, and self-sown firs are now springing up in multitudes, so close together that all cannot live. When I ascertained that these young trees had not been sown or planted, I was so much surprised at their numbers that I went to several points of view, whence I could examine...
Página 149 - Ascomycetes, a parasite which is accustomed to live upon, others' work ; its slaves are green algae, which it has sought out, or indeed caught hold of, and compelled into its service. It surrounds them, as a spider its prey, with a fibrous net of narrow meshes, which is gradually converted into an impenetrable covering ; but...