ALBERT

Description: The monotypic genus Motleyia (Rubiaceae) and the species M. borneensis are described on material from NW. Borneo. It is similar to Prismatomeris, from which it differs by the morphology of stipules, leaves, flowers, fruits and pollen grains and the occurrence of colleters inside the calyx limb.

Description: The genus Gentingia (Rubiaceae, Rubioideae) is described to accommodate the species G. subsessilis. It is a small tree or shrub with white, sessile or almost sessile, terminal flowers and glossy blackish, 1- or 2-seeded drupes, and is known only from submontane rain forests in NW. Peninsular Malaysia. It differs from the closely related genera Rennellia, Prismatomeris and Motleyia in the morphology of branches, stipules, inflorescence and calyx.

Description: Affinis C. monticoli Baillon ex Guill. sed vulgo fruticosa foliis crassis, plerumque retusis vel emarginatis, calycibus brevibus. – Frutex ad 3 m altus, raro scandens ad 7 m altus. Stipulae 1,3- 4,1 mm longae. Folia 2 ad nodos. Petiolus 3-31 mm longus. Lamina 2,3-15 cm longa, 1-7 cm lata, oblonga vel anguste oblonga vel anguste ad late obovata vel elliptica vel late elliptica, coriacea, infra pallide viridis vel glauca; basis anguste cuneata; margo plus minusve reflexa; apex obtusus vel retusus vel emarginatus vel acuminatus acumine ad 3 mm longo; nervi secundarii (4 —) 5—9 (—10); domatia absentia. Inflorescentia corymbosa vel breviter paniculata, 1-4 cm longa, nodis tumidis, (1-)5-20-flora; inflorescentiae partiales 3-7, 1-4-florae; pedicellus simplex vel raro biconnatus, (0-)0,5-9 mm longus et 0,9-1,3 mm latus (florens). Calycis tubus 0,8-1,9 mm longus et 2,4 – 3,2 mm latus, intus colleteribus numerosis; dentes ad 0,3 mm longi. Corollae tubus 3-7 mm longus et 2,2-2,9 mm latus; lobi 10-16 mm longi et 2,3-4,1 mm lati. Filamenta 3,4-8 mm longa; antherae 5-8 mm longae. Ovarium simplex. Stylus 7,5-11 mm longus; stigma 3,3-6 mm longum. Drupa 15-18 mm longa et 13-15 mm lata, globosa vel obovoidea, lutescens. – Typus: Johansson 107, New Caledonia, Pic du Pin, 400 m alt., 30 Dec. 1983 (S, holo). Usually a shrub up to 3 m, sometimes a liana up to 7 m. Stipules 1.3-4.1 mm long. Leaves 2 at each node; petiole 3-31 mm long; lamina 2.3-15 x 1-7 cm, usually oblong or obovate or elliptic, sometimes narrowly oblong or narrowly or broadly obovate or broadly elliptic, coriaceous and thick, green or yellowish green on adaxial side, paler green to glaucous on abaxial side; base narrowly cuneate; margin reflexed; apex usually obtuse and rounded or broadly acute, sometimes retuse or emarginate or acuminate with acumen up to 3 mm long; pairs of secondary veins (4-)5-9(-10); venation yellowish green to yellow; domatia lacking; cuticle striate. Inflorescence a corymb or a short panicle, 1-4 cm long, with 5-20 flowers (flowers rarely single in an axillary reduced cyme); partial inflorescences 3-7, dichasia, each with 1-4 flowers; nodes of branches swollen; lowermost inflorescence branches 0.6-2 cm long; branches opposite; pedicels usually simple, rarely partially connate, (0-)0.5-9 mm long and 0.9-1.3 mm in diam. in flower, up to 11 mm long and up to at least 2 mm in diam. in fruit; calyx tube 0.8-1.9 mm long, 2.4-3.2 mm in diam.; colleters abundant along base of adaxial side; calyx teeth up to 0.3 mm long; corolla tube 3-7 mm long, 2.2-2.9 mm in diam.; corolla lobes 10-16 mm long, 2.3-4.1 mm wide, 2.1-3.3 times longer than tube; filaments 3.4-8 mm long; anthers 5-8 mm long; pollen grains: P = 39-46 μm; E = 44-60 μm; ovaries simple; style 7.5-11 mm long; stigma 3.3-6 mm long. Fruit 15-18 x 13-15 mm, globose to obovoid, yellow.

Description: In this revision of the genus Rennellia Korth. four species are recognized: R. elliptica Korth., R. amoena (Bremek.) J.T. Johansson comb, nov., R. speciosa (Wall, ex Kurz) J.D. Hooker, and R. morindiformis (Korth.) Ridley. Rennellia includes shrubs and small trees with white to pale bluish or pale violet flowers in panicle-, umbel-, or spike-like cymes. The pedicels and ovaries are nearly always connate. Rennellia is confined to tropical rain forests in SE Asia, Sumatra, and Borneo. The genus is closely related to Gentingia, Motleyia, and Prismatomeris, but differs from these genera in, e.g., inflorescence morphology and colour of the flowers. A key to the species is presented, and all species are illustrated with line drawings and their distributions mapped.

Description: Affinis C. monticoli Baillon ex Guill. sed vulgo fruticosa foliis crassis, plerumque retusis vel emarginatis, calycibus brevibus. \xe2\x80\x93 Frutex ad 3 m altus, raro scandens ad 7 m altus. Stipulae 1,3- 4,1 mm longae. Folia 2 ad nodos. Petiolus 3-31 mm longus. Lamina 2,3-15 cm longa, 1-7 cm lata, oblonga vel anguste oblonga vel anguste ad late obovata vel elliptica vel late elliptica, coriacea, infra pallide viridis vel glauca; basis anguste cuneata; margo plus minusve reflexa; apex obtusus vel retusus vel emarginatus vel acuminatus acumine ad 3 mm longo; nervi secundarii (4 \xe2\x80\x94) 5\xe2\x80\x949 (\xe2\x80\x9410); domatia absentia. Inflorescentia corymbosa vel breviter paniculata, 1-4 cm longa, nodis tumidis, (1-)5-20-flora; inflorescentiae partiales 3-7, 1-4-florae; pedicellus simplex vel raro biconnatus, (0-)0,5-9 mm longus et 0,9-1,3 mm latus (florens). Calycis tubus 0,8-1,9 mm longus et 2,4 \xe2\x80\x93 3,2 mm latus, intus colleteribus numerosis; dentes ad 0,3 mm longi. Corollae tubus 3-7 mm longus et 2,2-2,9 mm latus; lobi 10-16 mm longi et 2,3-4,1 mm lati. Filamenta 3,4-8 mm longa; antherae 5-8 mm longae. Ovarium simplex. Stylus 7,5-11 mm longus; stigma 3,3-6 mm longum. Drupa 15-18 mm longa et 13-15 mm lata, globosa vel obovoidea, lutescens. \xe2\x80\x93 Typus: Johansson 107, New Caledonia, Pic du Pin, 400 m alt., 30 Dec. 1983 (S, holo).\nUsually a shrub up to 3 m, sometimes a liana up to 7 m. Stipules 1.3-4.1 mm long. Leaves 2 at each node; petiole 3-31 mm long; lamina 2.3-15 x 1-7 cm, usually oblong or obovate or elliptic, sometimes narrowly oblong or narrowly or broadly obovate or broadly elliptic, coriaceous and thick, green or yellowish green on adaxial side, paler green to glaucous on abaxial side; base narrowly cuneate; margin reflexed; apex usually obtuse and rounded or broadly acute, sometimes retuse or emarginate or acuminate with acumen up to 3 mm long; pairs of secondary veins (4-)5-9(-10); venation yellowish green to yellow; domatia lacking; cuticle striate. Inflorescence a corymb or a short panicle, 1-4 cm long, with 5-20 flowers (flowers rarely single in an axillary reduced cyme); partial inflorescences 3-7, dichasia, each with 1-4 flowers; nodes of branches swollen; lowermost inflorescence branches 0.6-2 cm long; branches opposite; pedicels usually simple, rarely partially connate, (0-)0.5-9 mm long and 0.9-1.3 mm in diam. in flower, up to 11 mm long and up to at least 2 mm in diam. in fruit; calyx tube 0.8-1.9 mm long, 2.4-3.2 mm in diam.; colleters abundant along base of adaxial side; calyx teeth up to 0.3 mm long; corolla tube 3-7 mm long, 2.2-2.9 mm in diam.; corolla lobes 10-16 mm long, 2.3-4.1 mm wide, 2.1-3.3 times longer than tube; filaments 3.4-8 mm long; anthers 5-8 mm long; pollen grains: P = 39-46 \xce\xbcm; E = 44-60 \xce\xbcm; ovaries simple; style 7.5-11 mm long; stigma 3.3-6 mm long. Fruit 15-18 x 13-15 mm, globose to obovoid, yellow.

Description: The monotypic genus Motleyia (Rubiaceae) and the species M. borneensis are described on material from NW. Borneo. It is similar to Prismatomeris, from which it differs by the morphology of stipules, leaves, flowers, fruits and pollen grains and the occurrence of colleters inside the calyx limb.

Description: The genus Gentingia (Rubiaceae, Rubioideae) is described to accommodate the species G. subsessilis. It is a small tree or shrub with white, sessile or almost sessile, terminal flowers and glossy blackish, 1- or 2-seeded drupes, and is known only from submontane rain forests in NW. Peninsular Malaysia. It differs from the closely related genera Rennellia, Prismatomeris and Motleyia in the morphology of branches, stipules, inflorescence and calyx.

Description: In this revision of the genus Rennellia Korth. four species are recognized: R. elliptica Korth., R. amoena (Bremek.) J.T. Johansson comb, nov., R. speciosa (Wall, ex Kurz) J.D. Hooker, and R. morindiformis (Korth.) Ridley. Rennellia includes shrubs and small trees with white to pale bluish or pale violet flowers in panicle-, umbel-, or spike-like cymes. The pedicels and ovaries are nearly always connate. Rennellia is confined to tropical rain forests in SE Asia, Sumatra, and Borneo. The genus is closely related to Gentingia, Motleyia, and Prismatomeris, but differs from these genera in, e.g., inflorescence morphology and colour of the flowers. A key to the species is presented, and all species are illustrated with line drawings and their distributions mapped.

Description: The genus Caelospermum Blume is revised, and a key to the 7 species recognized is presented. Caelospermum consists of lianas and, sometimes, shrubs. The genus is distributed in SE. Asia, Indonesia, the Philippines, the Caroline Islands, Papua New Guinea, the Solomon Islands, E. Australia and New Caledonia. Caelospermum is closely related to Morinda, Pogonolobus and Gynochthodes, from which it differs by inflorescence and pollen morphology, etc. Caelospermum paniculatum F. Muell. var. syncarpum J.T. Johansson is described and two recombinations, C. volubile (Merr.) J.T. Johansson and C. salomoniense (Engl.) J.T. Johansson, are made. All species are illustrated with line drawings, and distribution maps are provided.