(noun.) the fine spores that contain male gametes and that are borne by an anther in a flowering plant.
埃德温娜手打
双语例句
At seven he painted the Battle of Waterloo with tiger-lily pollen and black-currant juice, in the absence of water-colours. 托马斯·哈代.还乡.
Many exotic plants have pollen utterly worthless, in the same condition as in the most sterile hybrids. 查尔斯·达尔文.物种起源.
Nearly all our orchidaceous plants absolutely require the visits of insects to remove their pollen-masses and thus to fertilise them. 查尔斯·达尔文.物种起源.
As the wind had set for several days from the female to the male tree, the pollen could not thus have been carried. 查尔斯·达尔文.物种起源.
Now, it is scarcely possible for insects to fly from flower to flower, and not to carry pollen from one to the other, to the great good of the plant. 查尔斯·达尔文.物种起源.
In other orchids the threads cohere at one end of the pollen-masses; and this forms the first or nascent trace of a caudicle. 查尔斯·达尔文.物种起源.
When an insect visits a flower of this kind, it rubs off some of the viscid matter, and thus at the same time drags away some of the pollen-grains. 查尔斯·达尔文.物种起源.
Thus, in plants, the office of the pistil is to allow the pollen-tubes to reach the ovules within the ovarium. 查尔斯·达尔文.物种起源.
The petals in the imperfect flowers almost always consist of mere rudiments, and the pollen-grains are reduced in diameter. 查尔斯·达尔文.物种起源.
Insects in seeking the nectar would get dusted with pollen, and would often transport it from one flower to another. 查尔斯·达尔文.物种起源.
As beekeeping developed as an industry, the close relationship to fruit growing and horticulture became apparent, as bees were discovered to be the greatest pollen carrying agents known. 佚名.神奇的知识之书.
It has lately been shown that bees, instead of searching for pollen, will gladly use a very different substance, namely, oatmeal. 查尔斯·达尔文.物种起源.
When the bees gather pollen and make wax and build cells, each step prepares the way for the next. 约翰·杜威.民主与教育.
And I will throw in Robert Brown's new thing--'Microscopic Observations on the Pollen of Plants'--if you don't happen to have it already. 乔治·艾略特.米德尔马契.