. The essentials of botany. Botany. PEANEBOOAMIA. 217 generally called—are loose cones generally crowded into considerable clusters. Each cone consists of a stem upon which are many flattish stamens, each bearing two pollen- sacs (Fig. 120). 462. The pollen-cells are roundish, and covered by a .r~^ A. Fig. 128.—a ripe cone of a Pine, partly cut away to abow the position of the seeds, g; A, a scale from a young cone, upper side showing two ovules (enlarged); B^ the same when mature, showing two winged seeds, ch. Each seed-coat has a small pore, M, through which the first root will grow in germi
. The essentials of botany. Botany. PEANEBOOAMIA. 217 generally called—are loose cones generally crowded into considerable clusters. Each cone consists of a stem upon which are many flattish stamens, each bearing two pollen- sacs (Fig. 120). 462. The pollen-cells are roundish, and covered by a .r~^ A. Fig. 128.—a ripe cone of a Pine, partly cut away to abow the position of the seeds, g; A, a scale from a young cone, upper side showing two ovules (enlarged); B^ the same when mature, showing two winged seeds, ch. Each seed-coat has a small pore, M, through which the first root will grow in germination. double wall, the outer being thick and hard, and in some cases swollen out into bladder-like enlargements, appar- ently for the purpose of enabling the oell to be carried in the air (Fig. 121, JB). One or more oells of the rudiment- ary first stage are always present (Fig. 121, y).. 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 Bessey, Charles E. (Charles Edwin), 1845-1915. New York, Holt
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1884
