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doi: 10.1038/015489c0
BEFORE instituting a comparison it is generally prudent to ascertain that the things to be compared are comparable. I am afraid Mr. Comber, who has done me the honour of making some remarks on what I have said in the pages of NATURE on the primordial type of flowers, has neglected this precaution. If I understand him rightly, he suggests that the “spike” of Selaginella is the hornologue of the spike of Carex pulicaris. He compares, then, the scales bearing macrosporangia of the former with the lower glumes bearing each an ovary of the latter.
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