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- W2068373280 abstract "Leaf venation patterns of 150 species of Euphorbia are presented and their value as a diagnostic feature in the genus assessed. Based on the gross venation patterns, the species have been grouped into uni-, bi-, tri-veined and special categories. The majority of the species studied belonged to the tri-veined category, in which ornamentation of the veins and the course of traces in the lamina proved useful additional characters. Features such as the size of the areoles, the number of vein endings, and their further ramifications and composition in each areole varied in the same leaf or in different leaves of a given species. Furthermore, no direct correlation could be established between the areole size and the numbers of vein endings and tips per areole. Forty species possess a parenchymatous vein sheath. Globular chloroplasts showed up conspicuously in the sheath cells of a few species. Dilated tracheidal elements, localized on the venules or at the tips of vein endings, are characteristic of the xerophytic species. In some instances, correlation was apparent between plants grouped according to their venation patterns and their habit." @default.
- W2068373280 created "2016-06-24" @default.
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- W2068373280 date "1974-04-01" @default.
- W2068373280 modified "2023-09-27" @default.
- W2068373280 title "Studies on the leaf anatomy of Euphorbia: II. Venation patterns*" @default.
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- W2068373280 doi "https://doi.org/10.1111/j.1095-8339.1974.tb01758.x" @default.
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