(共16张PPT)
认识身边的树
二/年/级/下
REN SHI SHEN BIAN DE SHU
演讲人:XXX
树的组成
树叶
树枝
树干
树根
树
冠
欣赏不同的树
椰
子
树
樱桃
树
松树
桃
树
枫
树
银杏
树
芭蕉树
柳树
柏树
造型奇特的树
树冠:外形多样
树枝
粗细不同
穿插交错
相互遮挡
有疏有密
树叶
观察下面这些树叶是什么形状?
树叶造型多样
树皮
药用价值
樟树皮
桑叶
消炎
止泻
保护树木
可以美化环境 吸收二氧化碳制造氧气
预防水土流失 预防风沙等
作业要求:
用你喜欢的方法画一棵大树或者由几棵树组成的树林。
注意:
画面饱满 色彩丰富 形式多样
8
●
hM
1
evergreen
YOUNIOO
evergreen
@vo8i号
都
evergreen
----------
evergreen
3
0
evergreen
搜狐社区
CLUB.
柏树
----
1
搜狐微博
@旅行志.
昵图网nipie,comM
网路14
图行天下
、
素材精品屋
CAIW.CO
昵图网w山w山.Y:zzm_god
N0:20110814002712970000
Terminal leaflet forms
at the end of the rachs
Leafets are
themselves
Pairs of leaflets
develop along
UNIPINNATE
UNIPINNATE
BIPINNATE
(PARIPINNATE)
(IMPARIPINNATE)
OPPOSITE]
famanndus indica
Carya ovala
Leucnena leucocephala
Winged petiole
Three leaflets
(leaf stald)reserbles
comprise a single
the true leaf
palmate leaf
Two leaflets
grow of a
single petiole
UNIFOLIATE
BIFOLIATE
TRIFOLIATE
Citrus hystrix
Hymenaea courbar
Tnfoium sp
Four palmately
Palmately
Variable numbers
arranged leaflets
compound leaves
of leaflets form
on a single petiole
with five leaflets
cepend ng on the
growing conditons
QUADRIFOLIATE
5-PALMATE
MULTIFOLIATE
Marsilea crenata
Aesculus pavia
Cannabis sp.