5. Tarenna foonchewii (W. C. Ko) Tao Chen, Fl. China. 19: 342. 2011.
宽昭龙船花 kuan zhao long chuan hua
Basionym: Ixora foonchewii W. C. Ko, Guihaia 19: 102. 1999.
Small trees, to 3 m tall; branches glabrous. Petiole 12-17 mm, glabrous; leaf blade drying papery and olive-brown, elliptic, 15-18 × 5-9 cm, glabrous, base obtuse, apex cuspidate or shortly acuminate; secondary veins 12 or 13 pairs; stipules persistent, broadly triangular, 12-14 mm, glabrous, long acuminate to aristate. Inflorescence cymose, ca. 7 × 5.5 cm, many flowered; peduncle ca. 3 cm, sometimes subtended by or bearing reduced leaves or leaflike bracts; bracts linear, 3-4 mm; pedicels ca. 1 mm. Flowers pedicellate. Calyx glabrous; hypanthium cupuliform, ca. 2 mm; limb deeply lobed; lobes triangular, ca. 1 mm. Corolla outside glabrous; tube ca. 13 mm; lobes narrowly ligulate to narrowly elliptic, ca. 5 × 3 mm, obtuse. Fruit unknown. Fl. Apr.
● Roadsides. Yunnan.
Based on the description of this species as having 5 corolla lobes, fully exserted anthers, and subcapitate stigmas, as well as its general aspect, this species seems better placed in Tarenna than Ixora. The protologue did not describe the number of ovules per ovary locule, which is not a significant character in Ixora and probably thus was not checked.