. Plant studies; an elementary botany. Botany. SHOOTS 75 55. The rootstock type.âThis is proL- ably the most common form of snhter- raucan .stem. It is elonijatcd, as are foli- age stems, and lience the scale leaves are well separated. It is prominentl}' used for food storage, and is also admirably adapted for subterranean migration (see Fig. OS). It can do for the plant, in the way of migrati(ni, what prostrate foliage- bearing stems do, and isin amore protected position. Advancing beneath the ground, it sends up a succession of branches to the surface. It is a very etticient method for the '
. Plant studies; an elementary botany. Botany. SHOOTS 75 55. The rootstock type.âThis is proL- ably the most common form of snhter- raucan .stem. It is elonijatcd, as are foli- age stems, and lience the scale leaves are well separated. It is prominentl}' used for food storage, and is also admirably adapted for subterranean migration (see Fig. OS). It can do for the plant, in the way of migrati(ni, what prostrate foliage- bearing stems do, and isin amore protected position. Advancing beneath the ground, it sends up a succession of branches to the surface. It is a very etticient method for the 'â 'spreading" <if plants. and is extensively used by grasses in cov- ering areas and forming turf. The persist- ent continuance of the worst weeds is often due to this habit (see Figs. 60, To). It is impossiljle 10 r e m o v e all of the indefinitely branc h i n g r o 0 t g t o c k s from the soil, and any fragments that remain are able to send up fresh crops i)f aerial branches. 53. Alternation of rest and activity.âIn all of the three stem types just mentioned, it is important to note that they are associated with a remark- FiG. 66. A bulb, made up ot overlap- able alternation between rest ping scales, which are fleshy on j^j^^ vigOrOUS activitV. From account of food storage.â After Grat,. 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 Coulter, John Merle, 1851-1928. New York, D. Appleton and Company
Size: 836px × 2991px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1900
