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A study of Phyllocladus hypophyllus, a little-known species, reveals several interesting morphological characters. The leafy, rhomboid phylloclade is a complex of axillary, lateral branching systems with their fused scale leaves. The upper portion of the short, stalk-like structure of the male strobilus appears to represent a suppressed phylloclade. The prominent nucellar beak is developed to an extent far exceeding the cases which have been reported from other living conifers.
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Hsuan Keng (1963) studied this question.
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