. The essentials of botany. Botany. CELL SAP 17 and scattered throughout the specimen. These crystals are composed of calcium oxalate. Add a little hydrochloric acid and they will dissolve without effervescence. (k) Similar crystals may be found in many other plants, Indian turnip (Arisaema), evening primrose (Oenothera), fuchsia, garden balsam (Impatiens), garden rhubarb, etc. (l) For crystals of other types examine sections of prickly pear (Opuntia), young basswood twigs, scales of onion, stem of lamb's quarters (Chenopodium), petiole of beet, etc. These are also composed of calcium oxa
. The essentials of botany. Botany. CELL SAP 17 and scattered throughout the specimen. These crystals are composed of calcium oxalate. Add a little hydrochloric acid and they will dissolve without effervescence. (k) Similar crystals may be found in many other plants, Indian turnip (Arisaema), evening primrose (Oenothera), fuchsia, garden balsam (Impatiens), garden rhubarb, etc. (l) For crystals of other types examine sections of prickly pear (Opuntia), young basswood twigs, scales of onion, stem of lamb's quarters (Chenopodium), petiole of beet, etc. These are also composed of calcium oxalate. (m) Examine a thin cross-section of the leaf of the rubber plant (Ficus elasiica). In some of the modified epidermal cells will be found peculiar stalked crystalline bodies of calcium carbonate deposited upon a cellulose core which hangs down into the cell cavity from the outer portion of the cell wall. Treat the section with hydrochloric acid. The cystolith, as it is called, dissolves with the evolution of CO2, leaving the cellu- lose core, thus distinguishing it from calcium oxalate, which dissolves without effervescence. 28. Cell Sap. The cytoplasm of a cell usually contains a large amount of water imbibed by it but not really a part of it. Water is also found fre- quently in drops (vacuoles) within the cell. This is the cell sap. It holds in solution the various soluble substances absorbed by the plant as well as those manufactured by the cell itself. It makes up by far the greater part of the bulk of the contents ^ of the average cell. Among the sub- fiq. 6.—Large vacuoles. i stances dissolved in the cell sap, in I addition to the mineral matters absorbed by the plant from the soil water, are many sorts of organic compounds produced by the cytoplasm. The most important of these are the various sugars and organic acids. The commonest of the sugars are saccharose or cane sugar. Please note that these images are extracted from scanned page images that may have been di
Size: 1492px × 1675px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectbotany
