The four megaspores that the first one, or the second one, or the third one towards the chala- zal end is functional arrange in a line.
直线形大孢子四分体，合点端第一、或第二、或第三个大孢子有功能。
The four megaspores that the first one, or the second one, or the third one towards the chala- zal end is functional arrange in a line.
直线形大孢子四分体，合点端第一、或第二、或第三个大孢子有功能。
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