Questo libro di testo tratta i concetti fondamentali della botanica, tra cui la struttura vegetale (organografia), i tessuti vegetali (istologia) e i processi fisiologici delle piante. Include anche un glossario completo di termini botanici per studenti e professionisti del settore.
1170 x 2136 px | 19,8 x 36,2 cm | 7,8 x 14,2 inches | 150dpi
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. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 176 SYSTEMATIC BOTANY. more than three hundred years ago. The Dutch improved it very much ; and single bulbs of choice varieties sold at enormous prices. The original yellow flowers have been greatly enlarged. Several species of Yucca (Fig. 290), a genus from Mexico and adjacent regions, are found in cultivation, as Adam's Needle, Spanish Bayonet, Bear- Grass, etc. 5. Lemnaceee. The Duckweeds are the smallest of the Phsenogams; they consist of floating parenchymous disks, with several or one {Lemna), or no {Wolffia) roots beneath. Their flower-clusters are sunken into pits in the top, or edge, of th& disks, and have one or two stamens and one pistil, each representing a flower. There are about twenty species, widely distributed in the Northern Hemi- sphere. 6. Aroideae. The Arum family includes mainly tropical herbs, which are often large and palm-like, with large leaves, having reticulated vena- tion, and the flower-cluster usually sur- rounded by a spathe. The flowers are borne on a spadix (Fig. 291); the perianth consists of from four to six scales, pr is wanting; stamens hypo- gynous; stigma sessile; fruit baccate (or dry). There are about one thou- sand species of Aroids, some of which attain a height of from six to twelve feet; one recently discovered in Suma- tra {Amorphophallus Titanum) has a ^'^ spathe six feet in depth, and two and a half feet in diam- eter. The Indian Turnip (Ariscema iriphyllum, and A. Fig. 291. Spathe and spadix of Indian Turnip.. 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 work.. Kellerman, William Ashbrook, 1850-1908. Philadelphia, J. E. Potter and Company
