Oreocharis, Bentham, 1876

Ling, Shao-Jun, Wen, Fang & Ren, Ming-Xun, 2022, Oreocharis hainanensis (Gesneriaceae), a new species from karst regions in Hainan Island, South China, Phytotaxa 538 (4), pp. 281-291 : 288

Key to the species of Oreocharis in Hainan Island

1. Anthers horseshoe-shaped, 1-loculed, dehiscing transversely ............................................................................................ O. flavida

- Anthers broadly oblong, 2-loculed, dehiscing longitudinally ............................................................................................................ 2

2. Stamens included, floral tube thin tubular...................................................................................................................... O. jasminina

- Stamens exserted, floral tube conical or campanulate........................................................................................................................ 3

3. Corolla yellow ............................................................................................................................................................. O. hainanensis

- Corolla orange-red.............................................................................................................................................................................. 4

4. Leaf blade adaxially grey pubescent, base oblique, subrounded to cordate, margin serrulate; petiole to 14.5 cm, densely pale brown villous; cymes 1–3 (or 4)-flowered; corolla 1.7–2.4 cm, tube 1.1–2 cm ....................................................................... O. dasyantha

- Leaf blade adaxially grey to brown pubescent and villous, base sometimes oblique, cuneate to subcordate, margin crenate-serrate; petiole to 6 cm, densely pale brown woolly; cymes 3–8-flowered; corolla ca. 1.6 cm, tube 9–11 mm ............................................... ............................................................................................................................................................ O. dasyantha var. ferruginosa