Haworthia retusa (L.) Duval
俗名：寿 正寿
说明：这个规整的寿标本植株，直径超过10cm，正在阳光下茁壮生长。寿最早由植物学家林奈命名，意思是凹面的，以前很多类似的寿类瓦苇都在这个种内，后来又命名了很多类似的寿类植物，组成瓦苇属软叶亚属（软叶类瓦苇）重要的一个组别“寿类瓦苇”，也是“窗”类瓦苇的代表品种。
Sources: South-east of Riversdale School(South Africa), ex JDV89/21
Data: (KA1281) Large rosettes plants have thick, wide leaves and translucent end-areas, leaves are very recurved, with flattened, triangular, windowed ends form. In its native habital these windowed faces are alone exposed to the sunlight.
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