BIOL 2010 Lecture Notes - Lecture 5: Pith, Honey Locust, Cotyledon
2 Dec 2016
School
Department
Course
Professor
Document Summary
Stems: understand the external form, origin and development of stems (anatomy, distinguish between a dicot (woody or not) vs. monocot stem, recognize different specialized stems. Outline: external form of a woody twig, origin and development of stems, tissue patterns in stems. Monocotyledonous stems: specialized stems, wood and its uses. External form of a woody twig: cells produced by meristem become shoot system with branches and leaves, woody twig consists of an axis with attached leaves. Node - area of stem where leaves are attached. Leaf has a flattened blade and is usually attached to the twig by petiole. External form of a woody twig: alternate or spiral, opposite - attached in pairs, whorled - in groups of three or more. External form of a woody twig: axil - angle between petiole and stem. Axillary bud located in axil: will become branches or flowers in flowering plants, bud scales protect buds, terminal bud at twig tip.
