Investigation and analysis of herbaceous plants on junior high school campuses of Pingtung City.
Some 182 species of herbaceous plants (146 genera and 50 families) were found in the campuses of junior high schools in Pingtung city, Taiwan. Of these, 128 species were dicotyledonous plants (92 species were wild and 36 species were cultivated). The other 54 species were monocotyledonous plants (31 wild species and 23 cultivated species). All species were native and naturalized, indicating that endemic species have difficulty occupying urban regions. The dominance of naturalized species in the campuses indicated that they fit disturbed environments well. Among the cultivated plants, only 2 native species had beautiful flowers. The number of wild species was highest in the campus of Tatung junior high school and lowest in the campus of Gung-jeng junior high school. The number of species was correlated with campus size, management of campus garden, and area of open ground. The common wild dicotyledon herbaceous species found in the campuses of junior high schools of Pingtung city included Vernonia cinerea, Chamaesyce thymifolia, Bidens pilosa var. radiata, Dentella repens, Mikania micrantha, Pilea microphylla, Phyllanthus amarus [Phyllanthus niruri], Cleome rutidosperma, Heliotropium procumbens var. depressum, Acalypha indica, Crassocephalum crepidioides, Chamaesyce hirta, Scoparia dulcis, Conyza sumatrensis, Emilia sonchifolia var. javanica, Chamaesyce hyssopifolia, Youngia japonica subsp. japonica, Oxalis corniculata, Lindernia crustacea, Hedyotis corymbosa, Pouzolzia zeylanica and Eclipta prostrata. The common wild monocotyledon herbaceous species included Digitaria radicosa var. reticosa, Eleusine indica, Axonopus compressus, Echinochloa colona, Paspalum conjugatum, Chloris barbata, Cynodon dactylon, Kyllinga nemoralis and Eragrostis amabilis [E. tenella].