Cyathea traehypoda
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The type of Alsophila alpina has rachises almost completely covered on lower surface with woolly scales, but others from type locality have only remnants of such a covering. This species is very near C. crenulata, but differs in its spiny stipe.
A specimen from Harau-Canyon, near Pa- jakumbuh, at 800 m (Meijer 5282) has a spiny stipe with fine woolly covering, but costae and costules almost glabrous apart from minute long-fringed scales on costae, like those forming the woolly covering on the stipe but smaller.
A specimen from Harau-Canyon, near Pa- jakumbuh, at 800 m (Meijer 5282) has a spiny stipe with fine woolly covering, but costae and costules almost glabrous apart from minute long-fringed scales on costae, like those forming the woolly covering on the stipe but smaller.