Abstract
The present studies were conducted to prepare inventory of wild and introduced ornamental tree species growing at Hayatabad Township. A total of 106 tree species belonging to 83 genera and 43 families of gymnosperms and angiosperms were recorded. In dicots Moraceae was the leading family with 3 genera and twelve (12) species and Ficus was the leading genus with eight (8) species. In monocots Arecaceae was the leading family with six (6) genera and seven (7) species. Apocynaceae was represented by 4 genera and 5 species, Caesalpinaceae was represented by 3 genera and 6 species. Mimosaceae (4 genera and 6 species), Acacia was the leading genus, Myrtaceae (5 genera and 6 species), Papilionaceae (6 genera and 6 species). Euphorbiaceae was represented by 5 genera and 5 species. Anacardiaceae, Bignoniaceae, Boraginaceae, Rhamnaceae, Rosaceae and Rutaceae were represented by 3 species each. Pinaceae, Cupressaceae, Magnoliaceae, Oleaceae, Salicaceae and Sterculiaceae were presented by 2 species each. The rest of the twenty three (23) families were presented by a single species each. Many of these species are exotic i.e. Michelia champaca, Magnolia grandiflora and Cycas revoluta. Acacia modesta, A. nilotica, Prosopis juliflora, Tamarix aphylla, Zizyphus mauritiana and Z. nummularia are limited to some very few localities due to heavy construction and natural habitat destruction. Eucalyptus camaldulensis is one of the invasive species. A single individual of Eucalyptus cineria was found in Bagh-e-Naran. It is recommended that Environmental Impact Assessment (EIA) must be carried out and before introducing exotic species which may cause severe threat to the naturally growing indigenous flora.
