花粉

Preliminary study on the pollen morphology of Paulownia.

标题 泡桐属花粉形态的初步研究。

Most material available has poorly preserved flowers which perhaps explains the original description of the pollinia as pendulous.

可提供的大多数材料已经不好保护或许象下垂的那样解释花粉块的原始描述的花。

Pine pollen is the traditional Chinese medicinal materials, and has revenue of modern "Chinese Pharmacopoeia."

松花粉是中国传统药材，并已收入现代《中国药典》。

The journal founded in 1902, publishes original research papers (especially those with regional emphasis on western Europe and tropical Africa), review articles, short communications and book reviews on the systematics of all plant groups and fungi, also covering related fields such as phytogeography, evolution, comparative morphology, pollen and spores, and vegetation studies.

杂志创刊于1902年，刊载原始研究论文（尤其是关于西欧和热带非洲地区的投稿），评论文章，短通讯和书评，内容涉及所有植物群和真菌的系统分类学，同时也包括相关的领域，例如植物地理学，进化，比较形态学，花粉和孢子，以及植被研究。

When the pistil receives pollen,it will grow into a fruit.

当雌蕊接受花粉后，它会长成果实。

They will spread the pollen onto the pistil of the flower.

它们就把花粉传播到雌蕊上。

Stapfii Sleumer from New Guinea, has a short raceme bearing a pistillate flower with young fruit developing, and a staminate flower with pollen-bearing anthers.

stapfii Sleumer的标本，有短的总状花序生雌花具发育的幼果和雄花具有花粉的花药。

Pistillate flowers with stamens undeveloped or without pollen; disk often absent; ovary terete or obovoid; stigma capitate or discoid, sometimes 2- or 3-lobed, sessile.

雌花具不发达的雄蕊或没有花粉；花盘经常无；子房圆柱状的或倒卵球形；柱头头状或盘状，有时2-或3裂，无梗。

However, pollen and seed hairs from the trees tend to disperse widely during the spring, polluting the environment and triggering allergic reactions. Such negative traits restrict the use of London plane tree within urban landscapes.

但是，悬铃木的花粉、种毛等问题不仅污染环境，还容易诱发各种呼吸性和过敏性疾病，从而限制了它的进一步应用。

Double fertilization The fusion of one pollen nucleus with the egg to form the zygote and of the other pollen nucleus with a polar nucleus to form the triploid endosperm nucleus.

双受精：指花粉粒中的一个精子与胚珠中的卵细胞结合形成受精卵，另一个精核与极核结合形成三倍体的胚乳核。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。