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- W2079685005 abstract "A reinvestigation of the Triassic conifer pollen cone of Darneya shows evidence that clusters of pollen sacs are attached (adnate), at regular intervals, to the upper side of the stalk and that the distribution of stomata is restricted to the apical part of the abaxial side of the peltate scale. These features and others, such as the commissure visible on the stalk and the scale, suggest a dual nature of the male scale complex of Darneya which therefore is interpreted as an abaxial bract fused with an adaxial fertile shoot bearing several clusters of pollen sacs. This conifer pollen cone is thus considered as a compound strobilus (inflorescence) homologous with the female cone of the conifers and therefore with the cones, both male and female, of the cordaites. Une réinvestigation du cône mâle de Darneya, un conifère triasique, montre que les bouquets de microsporanges sont fixés (adnés), à intervalles réguliers, à la face supérieure du pétiole et que la distribution des stomates est limitée à la partie apicale de la face abaxiale de l'écaillé peltée. Ces caractères et d'autres, tels que la commissure visible dans le pétiole et l'écaillé, suggèrent une nature double du complexe écaille de Darneya, qui est interprété comme un rameau fertile adaxial soudé à une bractée abaxiale et, de ce fait, comme une fleur. Ce cône mâle est ainsi considéré comme une structure composée (inflorescence) homologue du cône femelle des conifères et des cônes, mâles et femelles, des cordaïtes." @default.
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- W2079685005 date "1998-04-01" @default.
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- W2079685005 title "Homologies among Coniferophyte cones: further observations" @default.
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- W2079685005 doi "https://doi.org/10.1016/s1251-8050(98)80079-7" @default.
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