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...botanist Robert Brown, attributing the motion to random collisions of the pollen particles with the molecules of the liquid in thermal motion. <ref name=ren

...ects groups. Some groups of plants developed [[nectar]] and large sticky [[pollen]] while insects evolved more specialized morphologies to access and collect

...ent parts.<ref name="McCarthy & Rubidge"/> Leaves and fruits are shed, and pollen can disperse far away from the original plant. Unless these structures are ...g the material, which appears as a black film of coal.<ref name="MacRae"/> Pollen and spores are very small and easily trapped in sediments.<ref name="McCart

...various types of [[particulate matter]] derived from sources such as dust, pollen and spores, sea spray, volcanoes, meteoroids, and industrial activities.

...mportant to identify periods of higher risk from the climate. For example, pollen formation from the mother cell, and the stages between [[anthesis]] and mat ...ni HS ''et al.'' (1984) Effect of heat stress during floral development on pollen tube growth and ovary anatomy in wheat (''Triticum aestivum'' L.) ''Austral

...mportant to identify periods of higher risk from the climate. For example, pollen formation from the mother cell, and the stages between [[anthesis]] and mat ...ni HS ''et al.'' (1984) Effect of heat stress during floral development on pollen tube growth and ovary anatomy in wheat (''Triticum aestivum'' L.) ''Austral

...sect]]s, [[pollination|pollinate]] [[flower]]s—transferring the flowers' [[pollen]] in return for [[nectar]], which the bees drink as [[food]]. Flowers are o ...life. For instance, many animals—especially the [[insect]]s—transfer the [[pollen]] of many [[flowering plant]]s in an act called [[pollination]], aiding the

* ''[[Pollinia]]'': pollen aggregated into [[cartilaginous]] structures; The [[pollen]] grains are usually compressed into waxy pellets called [[pollinia]], but

* ''[[Pollinia]]'': pollen aggregated into [[cartilaginous]] structures; The [[pollen]] grains are usually compressed into waxy pellets called [[pollinia]], but

...rs have argued a rodent could have played a part. Considering the types of pollen are mostly medicinal which would be ill-tasting to rodents and unlikely to

...s first described by [[Robert Brown]] in 1828 as the "tremulous motion" of pollen grains (small solid particles of diameter on the order of a micrometer) sus

...us types of [[particulate matter]] derived from sources such as from dust, pollen and spores, sea spray, volcanoes, meteoroids and industrial activities.

...eed'') and Solidago (''goldenrod''); ragweed and goldenrod are herbs whose pollen is aggravating to some hay fever sufferers. These are commonly given during

...an uncommon occurrence, usually requiring hard parts (like teeth, bone or pollen), the [[fossil record]] is traditionally thought to provide only sparse and