. Elementary botany . Fig. 287. Gingko biloba, diagrammatic representation of the relation of pollen tube to the arche- gonium in the end of the nucellus. pt} pollen tube; 0, archegonium. (Alter drawing by and Ikeno.) 437. Gymnosperms are naked seed plants. — The pine, as we have seen, naked seeds. That is, the seeds are not enclosed within the carpel, but

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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany