Mouretia species

Anh, Tran Thi Phuong, Nguyen, Khang Sinh, Binh, Tran Duc, Quang, Bui Hong & Wu, Lei, 2021, Mouretia oblanceolata (Rubiaceae), a new species from central Vietnam, Phytotaxa 484 (2), pp. 237-243 : 242

Key to all Mouretia species (data derived from Tange 1997)

1. Leaves anisophyllous...................................................................................................................................................... M. inaequalis

- Leaves isophyllous .............................................................................................................................................................................2

2. Habit erect to sub-erect; lateral veins 10 – 16 pairs; inflorescences umbrella-like or star-like cymes ................................................3

- Habit procumbent; lateral veins 4 – 10 pairs; inflorescences head-like cymes....................................................................................4

3. Stipules obcordate (8 – 10 mm long); lateral veins 12 – 16 pairs; inflorescences umbrella-like cymes; peduncles 2 – 5.5 cm long; calyx lobes deltoid............................................................................................................................................................... M. oblanceolata

- Stipule oblong to transversely oblong (2 – 3 mm long); lateral veins 10 – 11 pairs; inflorescences star-like cymes; peduncles 1 – 2 cm long; calyx lobes triangular ................................................................................................................................................ M. larsenii

4. Inflorescences terminal and solitary; peduncles 1 – 2 cm long; calyx lobes ovate to obovate; stipules rounded to reniform............... ...................................................................................................................................................................................... M. tonkinensis

- Inflorescences axillary and paired at nodes; peduncles 0.5 – 1 cm long; calyx lobes triangular; stipules oblong to obovate............... .................................................................................................................................................................................... M. vietnamensis