Whiffen, A.J. 1942: A discussion of some species of Olpidiopsis and Pseudolpidium. American Journal of Botany 29(8): 607-611.
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| Whiffen, A.J. 1942: A discussion of some species of Olpidiopsis and Pseudolpidium. American Journal of Botany 29(8): 607-611. |