Archive image from page 132 of The different forms of flowers The different forms of flowers on plants of the same species differentformsof01darw Year: 1877 ClIAP. III. ERYTHROXYLUM. 121 what opposed to the present species being lieterostyled; as is the great difference in the length of the pistil in several short- styled flowers. But the extraordinary variability in diameter of the pollen-grains, and the fact that in one set of flowers the grains from the long-styled flowers were larger than those from the short-styled, is strongly opposed to the lelief that Fhlox suhulata is lieterostyled.
Archive image from page 132 of The different forms of flowers The different forms of flowers on plants of the same species differentformsof01darw Year: 1877 ClIAP. III. ERYTHROXYLUM. 121 what opposed to the present species being lieterostyled; as is the great difference in the length of the pistil in several short- styled flowers. But the extraordinary variability in diameter of the pollen-grains, and the fact that in one set of flowers the grains from the long-styled flowers were larger than those from the short-styled, is strongly opposed to the lelief that Fhlox suhulata is lieterostyled. Possibly this sjoecies was once hetero- styled, but is now becoming sub-dioecious; the short-styled plants having been rendered more feminine in nature. Tliis would account for their ovaries iisually containing more ovules, and for the variable condition of their pollen-grains. Whether the long-styled plants are now changing their nature, as would appear to be the case from the variability of their pollen-grains, and are becoming more mascuHne, I will not pretend to con- jectvu'e; they might remain as heimaphrodites, for the co- existence of hermaphrodite and female plants of the same species is by no means a rare event. ErTTHROXTLUM [sp. ?] (ERYTHROXYLtD-a;). Fritz Midler sent me from South Brazil di'ied flowers of tliis tree, together with the accompanying drawings, which show the two forms, magnified about five times, with the petals removed. Fig. 8.
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