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碧桃

2017-03-21 03:26:04| 分类：校园·教育 | 标签： |举报 |字号大中小订阅

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碧桃Amygdalus persica L. var. persica f. duplex 观赏花用桃树。

(photo by M.J.Tang)

桃 Amygdalus persica= Prunus persica Peach tree

李属 Prunus（蔷薇科 Rosaceae）；

subgenus Amygdalus 桃亚属= 核（hard, woody shell = endocarp. Inside the shell is seed= nut.）有沟纹：

almond 扁桃 Prunus dulcis

peach 桃 Prunus persica；Peach fruits have fuss 毛茸 skin；

nectarines 油桃果皮光滑, fruits are fuzz-less due to a recessive allele；

碧桃 Amygdalus persica var. persica f. duplex，观赏花用；花单生，大多粉红色，半重瓣，重瓣，先于叶开放。

～～～～～～～～

核沒有沟纹：

cherry Prunus cerasus 櫻桃=樱,

apricot 杏 Prunus armeniaca；梅 Prunus mume

plum 欧洲李 Prunus domestica, 中国李 Prunus salicina

～～～～～～～～～～

a drupe 核果 (or stone fruit) is an indehiscent fruit，in which

an outer fleshy part 外層果肉(= exocarp, skin; and mesocarp, flesh) surrounds

a shell 硬殼 (the pit, stone, or pyrene 果核= hardened endocarp ）contains

a seed (nut, kernel 仁) inside。

e.g., a plum, cherry, almond, or olive 橄欖。 (油橄欖 Olea europaea, 木犀榄属 Olea, 木犀科 Oleaceae, 唇形目 Lamiales, 菊类植物 Asterids, 真双子葉植物 Eudicots)

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