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pteridosperm

n. an extinct seed-producing fernlike plant of the order Cycadofilicales (or group Pteridospermae)

同义词： seed fern

1、[古植]种子蕨

在这场植物历史变革中起承先启后作用的种子蕨(Pteridospermae)是裸子植物中一个占老而原始的类群,其实它早在泥盆纪就已出现,只是到了石炭纪才大为繁殖到中生代晚期绝灭。

生物学

n.an extinct seed-producing fernlike plant of the order Cycadofilicales (or group Pteridospermae)

同义词：seed fern

1.
N（名词） any extinct seed-producing fernlike plant of the group Pteridospermae 种子蕨 (Also called seed fern)

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