. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. ^COQQ^&pOCT. Fig. 68.—Stomata in Pit-like Depressions. i Surface view of a leaf of Dryandra Jloribunda. A portion of the hairs which fill the pit is removed, in order to show thestomata; x 350. 2 Vertical section through a leaf of Dryandra Jloribunda; x 300. narrow furrows which run along the green leafless branches, and that peculiar hair- structures are present in the" furrows, to which the air adheres, forming a barrier against water, exactly as in those of the Gytisus. The Casuarinse, wh
. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. ^COQQ^&pOCT. Fig. 68.—Stomata in Pit-like Depressions. i Surface view of a leaf of Dryandra Jloribunda. A portion of the hairs which fill the pit is removed, in order to show thestomata; x 350. 2 Vertical section through a leaf of Dryandra Jloribunda; x 300. narrow furrows which run along the green leafless branches, and that peculiar hair- structures are present in the" furrows, to which the air adheres, forming a barrier against water, exactly as in those of the Gytisus. The Casuarinse, which must finish their work for the year during the very short rainy period of their native country, require during this time arrangements providing for unhindered transpira- tion no less than does the Gytisus in the Southern Alps. Altogether this con- trivance is found to be present in only a limited number of cases; in perhaps only twenty papilionaceous shrubs, most of which belong to the Spanish flora, of the genera Reta/ma, Genista, Ulex, and Sarrothamnus, in addition to the Australian Casuarinas, and in allied species of Gytisus (holopetalus, purgans, ephedroides, equisetiformis, candicans, albus, &c). Most remarkably also this arrangement occurs in a small species of Broom (Genista pilosa), which is distributed over the mountains of Central Europe, over the heaths of the Baltic Lowlands, Denmark, Belgium, and England. And the presence of this contrivance here is the more strange, from the fact that the green branches with their furrows, in which lie stomata, are not leafless, but, on the contrary, are provided with a comparatively well-developed foliage. Among the most peculiar plants whose stomata are concealed in hidden nooks,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kerner von Marilaun,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1895
