. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. Fig. 70.—Orchids whose Stomata lie in Hollow Tubercles. • Bolbophyllum minutissimum. 2 A tuber seen from above; x8. s Vertical section through this tuber; X15. Odoardi. 5 A tuber; x6. 6 Longitudinal section through this tuber; x6. 4 Bolbophyllum in a succeeding dry period, which may follow immediately; but this must be spoken of again later. The occurrence of "rolled leaves", which are observed in so many plants of widely different affinity, is also connected with the keeping of water from
. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. Fig. 70.—Orchids whose Stomata lie in Hollow Tubercles. • Bolbophyllum minutissimum. 2 A tuber seen from above; x8. s Vertical section through this tuber; X15. Odoardi. 5 A tuber; x6. 6 Longitudinal section through this tuber; x6. 4 Bolbophyllum in a succeeding dry period, which may follow immediately; but this must be spoken of again later. The occurrence of "rolled leaves", which are observed in so many plants of widely different affinity, is also connected with the keeping of water from the stomata. The rolled leaf is always undivided, of small area, generally linear, but sometimes ovate-linear, elliptical, or even circular in outline; always stiff, and usually ever- green, and therefore living through two or three periods of vegetation. Its edges are bent down and more or less rolled back, even whilst still hidden in the bud. In consequence of this, the lower side which faces the soil is hollowed to a greater or less extent, while the upper side, turned skyward, is arched. Frequently the leaf is rolled so as to inclose an actual chamber, which only communicates with the outer world by a very narrow fissure, as is the case, for example, in the Crowberry (Empetrum). The rolled-back margins of the leaves in this plant almost touch one another, and the epidermis of the lower side of the leaf forms the actual lining of the cavity which resulted from the rolling of the leaf (see fig. 712).. 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, Anton, 1831-1898; Oliver, F. W. (Francis Wall), 1864-1951; Busk, Marian (Balfour) Lady, 1861-1941; Macdonald, Mary Frances (Ewart); Kerner von Marilaun, Anton, 1831-1898. Pflanzenleben. English. New York, H. Holt and Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1895
