Abstract
P. virginianum L. is the only representative of the P. vulgare complex which is known to occur on the eastern seaboard of North America. It has hitherto been regarded as a well-characterized species readily distinguishable from all others by the possession of a striking type of stellate paraphysis which has been intensively studied by Martens1 and his collaborator, who regard them as modified sporangia. The chromosome number has previously been reported by one of us to be diploid2.
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References
Martens, P., Bull. jard. bot. Brux., 17, 1 (1943). Martens, P., and Pirard, N., La Cellule, 49, 385 (1943). Pirard, N., La Cellule, 51, 155 (1947).
Manton, I., “Problems of Cytology and Evolution in the Pteridophyta” (Cambridge, 1950).
Manton, I., Nature, 167, 37 (1951).
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MANTON, I., SHIVAS, M. Two Cytological Forms of Polypodium virginianum in Eastern North America. Nature 172, 410–411 (1953). https://doi.org/10.1038/172410a0
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DOI: https://doi.org/10.1038/172410a0
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