DENDROLOGY

Detailed explanation-1: -Flowering plants (angiosperms) are by far the largest, most diverse, and most important group of land plants, with over 250, 000 species and a dominating presence in most terrestrial ecosystems. Understanding the origin and early diversification of angiosperms has posed a long-standing botanical challenge [1].

Detailed explanation-2: -The orchid family (Orchidaceae) is the second largest family of flowering plants, with about 880 genera and some 26, 000 species distributed nearly worldwide.

Detailed explanation-3: -Angiosperms, which are flowering plants, are the largest and most diverse group within the kingdom Plantae.