Psychotria coelosperma F.M.Bailey

Bailey, F.M. (1904) Queensland Agricultural Journal 15(1): 492. Type: Barron River, 1877, Bailey. Mestons Expedition to Bellenden-Ker, 1904.

A slender vine not exceeding a stem diameter of 2 cm.

Leaf blades about 7.5-14 x 3.5-7 cm, petioles about 1-2.5 cm long, transversely wrinkled. Lateral veins forming loops inside the blade margin. Stipules interpetiolar, broadly triangular, about 8 x 6 mm.

Flowers about 4-5 mm diam. Hypanthium, calyx tube and lobes about 3 mm long. Calyx lobes fimbriate. Corolla tube about 3.5 mm long, lobes about 2.5 mm long, recurved. Corolla tube densely hairy on the inner surface just below the throat. Stamens about 3 mm long. Ovules one per locule. Style and stigma about 3 mm long, stigma bifid.

Fruits globular, about 9-15 mm diam. Seeds (probably pyrenes) one or two per fruit, each one about 6-7 x 5 mm, longitudinally ribbed on the convex surface. Embryo about 1.5-3 mm long. Radicle about 0.7 mm long, slightly narrower than the cotyledons.

Cotyledons broadly ovate, about 10-14 x 7-11 mm, petioles about 1-2 mm long. Cotyledonary stipules and petioles clothed in brown glands. Cotyledonary stipules triangular, about 1.5-2 mm long. First pair of leaves linear or linear-lanceolate, the blades about 30-35 x 8 mm, petioles about 2-3 mm long. At the tenth leaf stage: leaf blade about 6-8 x 2-2.5 cm, apex acute to acuminate, base cuneate to attenuate, petiole about 4-7 mm long. Midrib flush with the upper surface of the leaf blade. Stipules interpetiolar, connate at the base forming a sheath around the stem ending in two aristate or mucronate tips about 1-2 mm long. Tips usually have toothed or lobed margins.

Endemic to Australia(?), occurs in NT, CYP and NEQ. Altitudinal range from near sea level to 50 m. Grows in swamps or swampy rain forest.