Geniostoma rupestre

Geniostoma rupestre is a species of flowering plant in the family Loganaceae. It is a shrub or tree which ranges from Taiwan and Malesia to Papuasia, Queensland, New Zealand, and the western and central Pacific islands.

Geniostoma rupestre is a shrub or small tree from 2 to 5 meters tall, and occasionally up to 12 meters tall. It grows in both primary and secondary tropical moist forests, often in open areas in secondary forests, from sea level to 2,800 meters elevation. Plants often have a straggling form in the forest shade, with more dense and compact growth in open sunny areas.

Varieties
Ten varieties are accepted.
 * Geniostoma rupestre var. australianum (F.Muell.) B.J.Conn – northeastern Queensland
 * Geniostoma rupestre var. crassifolium (Benth.) B.J.Conn – New Caledonia
 * Geniostoma rupestre var. glaberrimum (Benth.) B.J.Conn – Solomon Islands, southwest Pacific, Caroline Islands, Marianas, Society Islands, and Tubuai Islands
 * Geniostoma rupestre var. hoeferi (Gilg & Gilg-Ben.) B.J.Conn – Caroline Islands and Marianas
 * Geniostoma rupestre var. lasiostemon (Blume) ined. – Malesia, New Guinea, and Caroline Islands
 * Geniostoma rupestre var. ligustrifolium (A.Cunn.) B.J.Conn – hangehange – New Zealand
 * Geniostoma rupestre var. rouffaeranum B.J.Conn – New Guinea
 * Geniostoma rupestre var. rupestre – Taiwan (Lan Yü and Lü Dao), Malesia, Papuasia, northwestern and southwestern Pacific islands
 * Geniostoma rupestre var. solomonense B.J.Conn – Solomon Islands
 * Geniostoma rupestre var. thymeleaceum (Baill.) B.J.Conn – New Caledonia