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
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。
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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
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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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