Urophylleae

Ordas, Jorge Anton D., Pinarok, Neil Alejandro A., Romeroso, Roanne B., Alejandro, Grecebio Jonathan D. & Banag-Moran, Cecilia I., 2019, A checklist of Rubiaceae species from Eastern Samar, Visayas, Philippines, Check List 15 (2), pp. 295-312 : 309

Tribe Urophylleae

Antherostele grandistipula (Merr.) Bremek., J. Arnold Arb. 21 (1940) 30.

Materials examined. Table 2. Fig. 5B

Tall shrub about 7–8 m high. Leaves oblong, 12–15 × 3–4 cm, coriaceous, base decurrent. Inflorescences axil- lary, in umbels of 2 to 4 flowers. Corolla light-green to white. Fruits globose to ovoid, 2 cm in diameter, green.

All members of the genus Antherostele are endemic to the Philippines. This species is occurs on Camarines Sur, Catanduanes, Samar, and Leyte, thriving in riverine habitats and along creek banks in forests. With a narrow geographic distribution which is restricted on the eastern side of the Philippine archipelago, it is thought to be Endangered ( Obico and Alejandro 2012). It can be recognized from other Antherostele species by its very large subpersistent stipules and very large fruits.