. South African botany. Botany. 56 SOUTH APRICAN BOTANY stem. The phellogen of the periderm when formed joins on to the lenticel cambium. It is important to notice that no cork cells are formed in a lenticel, and so air can pass freely into the stem. They can be made out by the naked eye as small specks or lines on young twigs. 32. Branching—There are two chief forms of branch- ing. (1) DiCHOTOMOUS Branching, and (2) Monopodial. Pis. 37.—Lenticel. c. Cutin. e. Epidermis, ch. Cork. p. Phellogen. cm-. Cortex. c«i. Complementary cells. Beanghing. In dichotomous branching (fig. 38) the growing poi
. South African botany. Botany. 56 SOUTH APRICAN BOTANY stem. The phellogen of the periderm when formed joins on to the lenticel cambium. It is important to notice that no cork cells are formed in a lenticel, and so air can pass freely into the stem. They can be made out by the naked eye as small specks or lines on young twigs. 32. Branching—There are two chief forms of branch- ing. (1) DiCHOTOMOUS Branching, and (2) Monopodial. Pis. 37.—Lenticel. c. Cutin. e. Epidermis, ch. Cork. p. Phellogen. cm-. Cortex. c«i. Complementary cells. Beanghing. In dichotomous branching (fig. 38) the growing point divides into two equal parts, then the growing points of these two branches do the same, so that we get a series of bifurcations. This type of branch- ing is chiefly met with in the mosses and ferns. In monopodial branching there is always a persisting main axis, the Monopodium, which gives off lateral branches. There are two kinds of monopodial branching, {a) Indefi- nite or Eacemose, and (6) Definite or Ctmosb. If the monopodium continues to grow, giving off lateral branches one after the other, we have indefinite or race- mose branching. If after giving off a lateral branch the monopodium ceases to grow and the branching is con-. 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 Storey, Francis W; Wright, K. London, New York, Longmans, Green
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1922
