科	槭树科 Aceraceae
属	槭树属 Acer
种	A. rubrum, A. saccharinumÂ
ZBAS	6

Maple trees are tall trees that can reach more than 29 meters in height and a crown of 16 meters. The flowering period is from March to April.

There are many types of maples in Michigan. The most common are the red maple and the silver maple. The red maple leaves turn red in autumn. Sugar maple, red maple, and black maple can be used to produce maple sugar, which is more expensive than honey. Because it is the water flowing from the holes in the tree, the sugar content is 4-6%. In this way, it is necessary to burn the fire in the snow and evaporate 40-60 times the water to obtain maple sugar. Maple trees in Michigan are similar to those in Canada, so these two places are great places to see autumn leaves.

1. Some maple trees are very tall, what you see is like this, it’s really unsightly. This is the female tree of Red maple (Acer rubrum, Sapindaceae). We’re almost done here now.

秋来叶似火， 春日染枝红

小蜜爱人《红枫题记》

2. It is estimated that the sky is too bright, and what you see is what it looks like. In fact, it looks very pretty in recent times! This is the female flower of red maple. Red maple is a strange plant, it is polygamo-dioecious, heterozygous. There are female trees, male trees, and bisexual trees (hermaphrodites).

3. Pick some flowers and see that they are indeed female. Those Y-shaped things are stigmas.

4. The red maple’s female flower has a solitary bee on it, which I guess is Halictid. I waited under the tree for two hours, hoping to see the bees collect. but. Some tall trees are full of bees, but it is not clear if they are bees. One year Michigan was warm in March (as if I happened to be in China), and many beekeepers said they tasted the honey of maple for the first time. There is a following box! It’s a pity I didn’t taste it

5. Silver Maple ( Acer saccharinum </ em>) is also heterozygous. Below the flowers you can see the red pistil, and the white long anthers.6. 另外一个树就都是雄性花。

7. The two flower clusters on the left are “complete flowers”, that is, both males and females (the pistil in red and the stamens in yellow), and the right flower has no female flower organ.

8. Acer negundo Acer negundo </ em>. The leaves of this maple are more special (like the leaves of an ash tree), so the English name is Boxelder.

9. This kind of maple I photographed by bees in Jilin in 2012 (thanks to Mr. Xue Yunbo, the director of Jilin Bee Institute for his company). Far away. It was very windy that day, so all the bees we photographed were flying in the air. It seems to be collecting pollen.

10. The wind is strong and the bees are not easy to land. Many times in the air, there should be only pollen.

11. Photographed by Zhongfeng, Japanese Red Maple, Acer palmatum var. Atropurpureum in Nanchang. </ em> That time, Professor Zeng Zhi accompanied us (thanks!). This is the only shorter maple.

12. I recently photographed a bee picking a maple tree in Beijing. It is estimated that it is Acer pictum. (Thanks to Liao Hong for identification, Beijing Institute of Botany).

12. Finally advertise an autumn scene in Michigan. These should be red maple trees (hence the name).

13. I went to see the maple leaves that time and saw many people fishing for salmon in this river. There are also many dead fish in the river after spawning.