Class 12 Botany is perhaps quite conceptual and easily the most scoring section in Biology. Apart from Diversity, maximum questions in the Botany section are from the units of Genetics and Ecology.

My notes present a concise source of all the material you willl ever need to approach these chapters in the most concise way possible. 

The notes are organized as follows:

1. Reproduction in Flowering Plants
2.  Principles of Inheritance and Variation
   1.  Genetics - 1
   2.  Genetics - 2
3.  Molecular Basis of Inheritance
   1.  Genetics - 3
   2.  Genetics - 4
4.  Plant Breeding
5.  Organisms and Populations
6.  Ecosystem
7.  Biodiversity and Conservation

Please note: While genetics is covered extensively, for Ecology, mainly the conceptual parts are covered. A reading of NCERT is must, especially for factual knowledge. 

Credits to three teachers for the complete set of these notes:

• Aashish Anand sir (AA sir) - the sir with "an Audi"; he always had interesting anecdotes to share, and would always make us laugh despite a huge syllabus.
• Vivek Singh sir (VS sir) - the sir with "the Flute"; he had an extremely charming vibe and his birthay wishes were always memorable; extremely crisp notes and content.