. Text-book of botany, morphological and physiological. Botany. FIG. 146.—Diagrams of a shoot with the leaves arranged with a uniform divergence of 2. FIG. 147.—Diagram of the flower-stalk of Paris quadri- folia; //wborl of the large foliage-leaves beneath the flower; ap outer, ip inner perianth-whorl; aa outer, ia inner stamens ; in the centre is the rudiment of the pistil consisting of four carpellary leaves. no orthostichies, i. e. if the median planes of all the members intersect one another on an axis without coinciding, their arrangement is solitary. The angle which the median planes of
. Text-book of botany, morphological and physiological. Botany. FIG. 146.—Diagrams of a shoot with the leaves arranged with a uniform divergence of 2. FIG. 147.—Diagram of the flower-stalk of Paris quadri- folia; //wborl of the large foliage-leaves beneath the flower; ap outer, ip inner perianth-whorl; aa outer, ia inner stamens ; in the centre is the rudiment of the pistil consisting of four carpellary leaves. no orthostichies, i. e. if the median planes of all the members intersect one another on an axis without coinciding, their arrangement is solitary. The angle which the median planes of two members of the same axis. enclose is their Divergence; it is expressed either in degrees or as a fraction of the circumference of the axis, which is then supposed to be a circle, although in fact this is not usually the case. In order to represent the divergences clearly, they may be drawn on a horizontal section of the vertical axial structure, in the manner represented in Figs. 146 and 147. The transverse sections of the axial structure which bear the lateral members—in this case leaves—are denoted by concentric circles, the outermost circle corresponding to the lowest, the innermost to the highest transverse section. On these circles, which thus represent the relative ages from without inwards according to their succession in the acropetal develop- ment of the axis, the positions of the members are denoted by dots, or the forms of the planes of insertion themselves may be approximately indicated, as in the figures. On such a projection or diagram the median planes of the members. 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 Sachs, Julius, 1832-1897; Vines, Sydney Howard, 1849-1934. ed. and tr. Oxford, Clarendon press
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1882
