| Family | Phyllanthaceae (also placed in Euphorbiaceae) |
| Tribe | Phyllantheae |
| Subtribe | Flueggeinae |
| Scientific name | Phyllanthus tenellus Roxburgh |
| Synonyms | Phyllanthus corcovadensis Müll.; Phyllanthus tenellus Roxburgh var. tenellus |
| Common name | (Japanese common name) naga-e ko-mikan sou (ナガエノコミカンソウ, 長柄小蜜柑草 [meaning: tiny orange weed with long leaf stalks]) |
| (English common name) Mascarene Island leaf-flower, Long-stalked Phyllanthus | |
| Distribution | (Japan) Honshu (west of Kanto region), Shikoku, Kyushu, Okinawa |
| (Other nations) [native] Yemen, Ethiopia, Tanzania, Mozambique, Mauritius, Reunion | |
| Chromosomal number | 2n=26 |
| Description | Plants electing 8-77cm. Leaves 0.8-2.4cm length, 0.1-0.3cm width. Flowers flowering in June to January. Annual plants. |
| Reference | Phyllanthus tenellus Roxb. |
| Phyllanthus tenellus | |
| Phylogenetics of tribe Phyllantheae (Phyllanthaceae; Euphorbiaceae sensu lato) based on nrITS and plastid matK DNA sequence dat | |
| Note | Naturalized plants (first discovered at Kanagawa prefecture in 1987). |
| September 2006 at Tsukuba Botanical Garden |
September 2006 at Tsukuba Botanical Garden |
September 2006 at Tsukuba Botanical Garden |
| September 2006 at Tsukuba Botanical Garden |