槭树科Aceraceae

槭树科

Aceraceae

1-Floral formula

Flowers in the Aceraceae are usually imperfect and

the plants may be either monoecious or dioecious.

There is a trend from insect to wind pollination.

在槭树花通常是不完善的，植物可以是雌雄同株或雌雄异 株。有一个趋势，从风昆虫

授粉。

2-Introduction

There are only two genera of Aceraceae, and most

species

belong

to

the

genus

Acer

.

This

family

is

most

common in the North Temperate Zone.

只有两种槭树属，大多数种，属宏基。这个家庭是 最常见的北温带。

3-Tree

All

members

of

the

Aceraceae

are

woody

plants,

either

trees

or

shrubs,

with

one

species

being

a

woody

vine.

This example is

Acer saccharum,

sugar maple.

对槭树 科的所有成员都是木本植物，无论是树木或灌木，其中一名木质藤本植物。这

个例子是糖 槭，糖槭。

4-Winter twig

The leaves are opposite, hence the leaf scars are

opposite on winter twigs; this example is

Acer

saccharum,

sugar maple.

树叶是相反的，因此叶伤疤冬天树枝相反，这个例子是糖槭，糖槭。

5-Leaves

The opposite leaves are most often palmately lobed

and palmately veined. Some species have beautiful

fall color, as in red maple,

Acer rubrum.

相反的 叶子是最常见的掌状浅裂和掌状叶脉。

有些品种有美丽的秋天的颜色，

< br>如红枫，

红枫。

6-Inflorescence

There is a trend from insect pollination to wind

pollination in the genus

Acer.

The first example to

be examined is the Norway maple,

Acer platanoides,

which

is

insect

pollinated.

You

can

see

these

flowers

have conspicuous petals.

有一 个趋势，从昆虫授粉风属中的宏基授粉。第一个例子进行审查，是挪威槭树，枫

树，这是 昆虫授粉。你可以看到这些花有明显的花瓣。

7-Male flower

There 5 sepals and 5 petals in this male flower of

Acer

platanoides,

Norway

maple.

In

the

center

of

the

flower

is

a

large

green

nectar

disk

to

attract

insect

pollinators.

Note

that

there

are

8

(eight!)

stamens,

a common number in the Aceraceae. There is NO

rudimentary gynoecium.

有

5

萼片和

5

个花瓣在 这个挪威槭，挪威槭树雄花。在花卉中心是一个大型的绿色花

蜜的磁盘，以吸引昆虫传粉 。请注意，有

8

（

8

< br>！）雄蕊，在槭树科共同的数目。没有

起码的雌蕊。

8-Female flower

This female flower of

Acer platanoides

, Norway

maple,

has

5

sepals,

5

petals,

8

staminodia,

a

large

nectar

disk,

and

a

syncarpous

gynoecium

of

2

carpels.

这是挪威槭，挪威槭树雌花，有

5< /p>

个萼片，花瓣

5

，

8 staminodia

，大型花蜜磁盘，

和

2

个心皮合生雌蕊。

9-Female flower

In this longitudinal section of a female flower of

Acer

platanoides

,

Norway

maple,

note

the

syncarpous

gynoecium of 2 carpels. The ovary has two prominent

wings, one on each side.

在这 种对挪威槭，挪威槭树，雌花纵剖面注意到

2

心皮合生雌蕊。卵 巢有两个突出的

翅膀，每一方之一。

10-Fruits

The fruits of

Acer

are schizocarps that break apart

into

2

mericarps.

Since

each

mericarp

is

winged,

they

are

also

samaras.

This

example

is

Acer

platanoides

,

Norway maple.

宏 基的果实

schizocarps

的拆分成

2

mericarps

。由于每个

mericarp

是翅膀，它们也

萨马拉斯。这个例子是挪威 槭，挪威槭树。

11-Silver maple trunk

Trees

of

Silver

maple,

Acer

saccharinum,

have

light

gray, scaly bark

银槭树，银槭，有浅灰色，鳞片状树皮

12-Male inflorescences