Australian Tropical Rainforest Plants - Online edition
Ptychosperma macarthurii (H.Wendl. ex H.J.Veitch) H.Wendl. ex Hook.f.
Hooker, J.D. (1884) Report on the Progress and Condition of the Royal Gardens at Kew, during the year 1882 : 55.
MacArthur Palm; Macarthur's Palm; Palm, MacArthur
Grows up to 9 m tall but usually flowers and fruits when smaller. Multistemmed or stems often clumped and usually surrounded by suckers.
Inflorescence 20-45 cm long bearing flowers in groups of three consisting of two male and one female flower. Male flowers with sepals 3, c. 1.5-2.5 mm long, yellow-green to light green; petals 3, c. 7 mm long, yellow-green to light green; stamens 23-40 per flower; ovary, style and stigma always well developed but the ovules are absent in the male flowers. Female flowers with sepals 3, 2 x 3 mm, cream-green; petals 3, 3-4 x 2-3.5 mm, cream-green; 3-6 staminodes present; stigma 0.5 mm llong, recurved.
Leaflets long and narrow, wider on older plants.
Occurs in NT and CYP. Altitudinal range quite small from near sea level to 400 m. Grows as an understory plant in lowland rain forest, monsoon forest and brackish mangrove. Also occurs in New Guinea.