Flowers, Fruits and LeavesMacmillan, 1886 - 147 páginas |
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Página 3
... called , in contradistinction to " self - fertilisa- tion , " was first conclusively proved by Mr. Darwin in his remarkable memoir on Primula ( Linnean Journal , 1862 ) , and he has since illustrated the same rule by researches on ...
... called , in contradistinction to " self - fertilisa- tion , " was first conclusively proved by Mr. Darwin in his remarkable memoir on Primula ( Linnean Journal , 1862 ) , and he has since illustrated the same rule by researches on ...
Página 7
... called sepals ; secondly , an inner envelope or corolla , which is gener- ally more or less coloured , and which , like the calyx , is sometimes tubular , sometimes composed of separate leaves called petals ; thirdly , of one or more ...
... called sepals ; secondly , an inner envelope or corolla , which is gener- ally more or less coloured , and which , like the calyx , is sometimes tubular , sometimes composed of separate leaves called petals ; thirdly , of one or more ...
Página 38
... called attention to a very interesting illustration afforded by Polygonum amphibium . In this species the stigma projects about one - fifth of an inch above the flower , so that if ants could obtain access , they would steal the honey ...
... called attention to a very interesting illustration afforded by Polygonum amphibium . In this species the stigma projects about one - fifth of an inch above the flower , so that if ants could obtain access , they would steal the honey ...
Página 40
... called " sleep " of flowers has reference to the habits of insects , on the ground that flowers which are fertilised by night- flying insects would derive no advantage from being open in the day ; while , on the other hand , those which ...
... called " sleep " of flowers has reference to the habits of insects , on the ground that flowers which are fertilised by night- flying insects would derive no advantage from being open in the day ; while , on the other hand , those which ...
Página 46
... called the corolla ; thirdly , a whorl of organs more or less like pins , which are called stamens , in the heads , or anthers of which , the pollen is produced . These anthers are in reality , as Goethe showed , modified leaves ; in ...
... called the corolla ; thirdly , a whorl of organs more or less like pins , which are called stamens , in the heads , or anthers of which , the pollen is produced . These anthers are in reality , as Goethe showed , modified leaves ; in ...
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Términos y frases comunes
Acacia advantage Agrimony allied animals anthers ants arrangement Beech bees belong branch canina capsule Cardamine carpel CHAP close colour common contrary corolla Crown 8vo curious Darwin Deadnettle dispersion distance Ditto Drosera Drosera rotundifolia edible Epilobium fertilised fertilised by insects flattened fleshy florets flower-head flowers Fritz Müller fruits genera genus Geranium Geranium dissectum Grant Allen ground grow Herb Herb Robert Hibiscus pedunculatus hirta honey hooks Hornbeam Horse Chestnut Illustrations inches insects instance internodes keel Lamium large number Lathyrus leaf-stalk leaflets leaves less light Lime lobed Maple maturity Moreover nearly observed ovary palmate perhaps petals pinnate pistil plants pods pollen Poplar produced protected resemblance ripe ripen scent Seedling seeds Senecio sepals small insects Spanish Chestnut species SQUIRTING CUCUMBER stalk stamens stamens and pistil stem stigma stomata surface Sycamore Thrincia throw trees tube upper Viola canina visited by insects wasp wind wings
Pasajes populares
Página 98 - But the leaves of the herbage at our feet take all kinds of strange shapes, as if to invite us to examine them. Starshaped, heart-shaped, spear-shaped, arrow-shaped, fretted, fringed, cleft, furrowed, serrated, sinuated; in whorls, in tufts, in spires, in wreaths endlessly expressive, deceptive, fantastic, never the same from footstalk to blossom ; they seem perpetually to tempt our watchfulness, and take delight in outstripping our wonder.
Página 117 - Here in the houseless wild, to direct the traveller's journey Over the sea-like, pathless, limitless waste of the desert.
Página 97 - Flowers seem intended for the solace of ordinary humanity : children love them ; quiet, tender, contented ordinary people love them as they grow; luxurious and disorderly people rejoice in them gathered : They are the cottager's treasure ; and in the crowded town, mark, as with a little...
Página 98 - Now. why is this marvellous variety, this inexhaustible treasury of beautiful forms ? Does it result from some innate tendency of each species? Is it intentionally designed to delight the eye of man ? Or has the form and size and texture some reference to the structure and organization, the habits and requirements, of the whole plant...
Página 3 - ... unknown until Mr. Darwin devoted himself to the subject. Our illustrious countryman was the first clearly to perceive that the essential service which insects perform to flowers, consists not only in transferring the pollen from the stamens to the pistil, but in transferring it from the stamens of one flower to the pistil of another. Sprengel had indeed observed in more than one instance that this was the case, but he did not altogether appreciate the importance of the fact. Mr. Darwin, however,...