The Encyclopedia Americana: A Library of Universal Knowledge, Količina 8Americana corporation, 1931 |
Iz vsebine knjige
Zadetki 1–3 od 71
Stran 231
... flowers are those so modified as to depend upon the wind to secure cross - fertilization by carrying the pollen of ... flowers of wind - fertilized plants are usually green , or greenish , inconspicuous , and have no odor or nectar . The ...
... flowers are those so modified as to depend upon the wind to secure cross - fertilization by carrying the pollen of ... flowers of wind - fertilized plants are usually green , or greenish , inconspicuous , and have no odor or nectar . The ...
Stran 232
... flowers with different lengths of stamens and styles . Spren- gel noted that some plants in Hottonia bear only flowers whose anthers are included in the tube , but whose style is exserted ; while other plants bear only flowers having ...
... flowers with different lengths of stamens and styles . Spren- gel noted that some plants in Hottonia bear only flowers whose anthers are included in the tube , but whose style is exserted ; while other plants bear only flowers having ...
Stran 235
... flowers on Bartlett pear - tree with pollen from another Bartlett pear - tree is in effect the same as pol- linating one flower on a plant with pollen from a different flower on the same plant and is what we recognize as self ...
... flowers on Bartlett pear - tree with pollen from another Bartlett pear - tree is in effect the same as pol- linating one flower on a plant with pollen from a different flower on the same plant and is what we recognize as self ...
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