Read this article in Hindi to learn about the aerial modifications of stems, explained with the help of suitable diagrams. भूमि के बाहर का सामान्य तना भी कुछ पौधों में विशेष कार्य, जैसे आरोहण, रक्षा, भोजन निर्माण, वर्धी प्रजनन आदि के लिए रूपान्तरित हो जाता है । कुछ महत्त्वपूर्ण उदाहरण नीचे दिये जा रहे हैं: 1. अंगूर (Vitis): i. यह [...]
In this article we will discuss about the common anomalous structures that occur in stems. A great diversity in the arrangement of vascular tissues is exhibited by the angiosperms in their stems. The arrangements, which exist in majority of the plants, are considered as normal. The variations are regarded as anomalous though the so-called anomalous structure is normal for the [...]
Here is a list of twenty-eight types of stems found in plants. 1. Stem of Helianthus Annuus (Sunflower. Family Asteraceae: Internal Structure before Secondary Growth): The transverse section through the internode of stem is more or less circular in outline and exhibits the following arrangement and structure of tissues from periphery towards centre (Figs. 31.1, 31.1A). Epidermis: The outermost layer [...]