เรื่อง ทะเบียนพันธุพืชในประเทศไทย

Osbeckia pulchra Geddes Melastomataceae
Osbeckia sp. Melastomataceae
Osbeckia stellata Buch.-Ham. ex Ker Gawl. var.
Melastomataceae
crinita (D.Don) C. Hansen
Osbeckia stellata Buch.-Ham. ex Ker Gawl. var.
Melastomataceae
marginulata C. Hansen
Osbeckia watanae Craib Melastomataceae
Osmanthus sp. Oleaceae
Osmunda sp. Osmundaceae
Ostodes sp. Euphorbiaceae
Osyris arborea Wall. ex A. DC. Santalaceae
Otochilus sp. Orchidaceae
Otopetalum micranthum Miq. Orchidaceae
Ottelia sp. Hydrocharitaceae
Ottochloa sp. Poaceae
Ouratea Ouratea Ochnaceae
Oxalis repens Thunb. Oxalidaceae
Oxalis sp. Oxalidaceae
Oxymitra Oxymitra Annonaceae
Oxyspora caudata Geddes Melastomataceae
Oxyspora gracilis Craib Melastomataceae
Oxyspora setosa Craib Melastomataceae
Oxyspora sp. Melastomataceae
Oxystelma sp. Asclepiadaceae
Pachira aquatica L. Bombacaceae
Pachygone odorifera Miers Menispermaceae
Pachygone sp. Menispermaceae
Pachylarnax praecalva Dandy Magnoliaceae
Pachylarnax sp. Magnoliaceae
Pachypleuria angustata (Hook. & Grev.) Presl Davalliaceae
Pachypleuria pectinata (Hoo(Smith) Presl Davalliaceae
Pachypleuria repens L. Davalliaceae
Pachypleuria vestita (Bl.) Presl Davalliaceae
Pachyptera sp. Bignoniaceae