![]() For when the axis or rachis is lengthened, it is the centre which bears it along with it at its apex, leaving the circumference at the base.ģ43. The student will readily perceive that the circumference of a depressed (flattened) inflorescence corresponds to the base of a lengthened one and also that the centre of the former answers to the summit of the latter. It is also called centripetal, because in the order of time the blossoming commences with the circumference, and proceeds towards the centre in case of a level topped cluster, as the hawthorn, or with the base, and proceeds towards the summit in case of the lengthened cluster, as the mustard. ![]() Axillary inflorescence is called indefinite, because the axis, being terminated by a leaf-bud, continues to grow on indefinitely, developing bracts with their axillary flowers as it grows. The forms of inflorescence are exceedingly various, but may all be referred to two classes, as already indicated the axillary, in which all the flowers arise from axillary buds, the terminal, in which all the flower-buds are terminal.ģ42. Other examples of the involucre are seen in the cup of the acorn, the burr of the chestnut, beech, etc.ģ41.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |