A Class Compend of Pharmaceutic Botany Embracing an Elementary Treatise on the Structural, Morphologic, Microscopic, Physiologic and Systematic ... for Students of Pharmacy and Pharmacists - Softcover

Inhaltsangabe

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893. Excerpt: ... plants in breadth. These become terminal as soon as their development is fairly under way; consequently each branch or shoot has a terminal bud like the parent or main axis, and will extend its growth in length as long as uninjured. If, however, destroyed by frost or violence, or if converted into a bloom, increase in that direction is forever at an end. The name axillary is significant of the fact that they always occur in the axils of leaves. These can be active or passive; in either case they are formed in early summer on the new growth of the stem, and may go into branches of considerable length at once, or in the following spring, when they would be considered active, or they may lay dormant from year to year, never showing any activity, and without warning they may suddenly, upon favorable conditions, begin to grow into branches, thus producing an irregularity both in position and time, when they would be considered passive or latent. The suppression of such buds tend to produce plants of simple forms, having a branchless trunk of considerable height crowned with a solitary tuft of leaves. If terminal bud is injured, the highest axillary bud comes to the rescue and continues extension of the part as best it can. Third, as to Irregularity. Buds sometime occur without method. Of these we have two kinds, viz.: 1. Adventitious or Accidental buds are those that are neither terminal nor axillary, but grow anywhere on the plant: in the internodes of stems and branches, on the roots, or even on the leaves. These generally are a result of local injury, inasmuch as nature, in her effort to repair, sends an abundance of nourishing materials to such scarified points, and from the plus quantity of such these buds have their creation. When the Osier Willows are p...

Die Inhaltsangabe kann sich auf eine andere Ausgabe dieses Titels beziehen.