Keys to the genera of Pteropsida

1. Sporangia in two rows, embedded in an almost terete spike . . . . . . Ophioglossum 1. Sporangia on branches of the fertile segment of a frond.

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Journal	Flora Malesiana - Series 2, Pteridophyta
Rights	Released under the CC-BY 4.0 ("Attribution") License
Organisation	Naturalis journals & series
Citation APA Style AAA Style APA Style Cell Style Chicago Style Harvard Style IEEE Style MLA Style Nature Style Vancouver Style American-Institute-of-Physics Style Council-of-Science-Editors Style BibTex Format Endnote Format RIS Format CSL Format DOIs only Format	Holttum, R. E. (1959). Keys to the genera of Pteropsida. Flora Malesiana - Series 2, Pteridophyta, 1(1), 15–19.

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