The microscope : and its application to vegetable anatomy and physiology / by Dr. Hermann Schacht ; edited by Frederick Currey, M. A.

Hermann Schacht

Date:: 1855

Credit: The microscope : and its application to vegetable anatomy and physiology / by Dr. Hermann Schacht ; edited by Frederick Currey, M. A. Source: Wellcome Collection.

158/230 (page 134)

$18:t other buds, of a small cellular protuberance. The clevelope- nieut of them may be examined by means of longitudinal and transverse sections; and careful attention must be paid to the connexion between the rudiments of these buds and the vascu- lar bundles of the pai-t from Avhich they originate. The Puuc- tum vegetationis of a stem-bud sometimes becomes divided into two or more parts, each of which may be develojjed into a branch or a lioAver. The stem of Selaginella i-amifies in this manner as Avell as the ilhizome of Epipogium and Coiullorhiza. In the Beech, the tAvo flowers Avhich are enclosed in one capsule also originate in tliis manner. The diA’ision of the Punctum A'egetatiouis of stem-buds and root-buds may j^inbably also be observed in many other cases. Good longitudinal sections made at diflerent periods of developement are here Anry necessary, and the sections must pass precisely through the middle. In order to follow out fully the deAmlopement of buds a suffi- cient time must be devoted to the inquiry; by this means the obseiwer ascertains hoAV long a time is requii-ed after the rudi- ments of a bud are formed before it becomes develo]jed into a branch or floAver, he also becomes acquainted Avith the dilferent periods of existence of different buds. For instance, the biid which forms the cone of Abies pectinata requires tAvo Avhole years to perfect itself. It begins to be formed late in the summer, and almost contemi^oraneoiisly Avitli the leaf in the axil of Avliiclx it originates. In the sxicceeding sjxring tj/is bud forms its scales; in the siunmer the inidiments of the cone are formed under the protection of the scales, and continue under their cover duriixg the winter; in the next succeeding spring {i.e., the second spring), it bursts forth, and in the autumn the cone I’ipens. There are many plants in Avhich the buds Avhich originate near one another in the axil of the same leaf become deA’eloped in a different manner, and at different periods; this is the case Avith the Lime and the Vine. With regard to the morpholog}^ of buds, it is necessary to obsei-A^e the position and arrangenxent of the leaA'es, and to notice also the scales, and the manner in Avhich the latter ])ass by degrees into true leaA^es. With regard to the anatomy of$