Volume 1 includes about 230 rare, vulnerable and endangered categories of plants. The information is also supplemented with line drawings and photographs for several species and will be useful in the proper identification of these species in the field and will also aid in planning suitable conservation measures.
Volume 2 includes 192 data sheets on threatened vascular flora and some of these are also distributed in similar phytogeographical areas in the neighbouring countries of the Indian subcontinent.
Volume 3 deals with 195 threatened taxa of Indian flora. A few data sheets supplied by scientists on species with wider distribution areas covering parts of adjoining countries have been excluded in the volume.