Australian Tropical Rainforest Plants - Online edition

Pleioluma macrocarpa (P.Royen) Swenson

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Fruit, two views and seeds. © W. T. Cooper
Scale bar 10mm. © CSIRO
10th leaf stage. © CSIRO
Cotyledon stage, epigeal germination. © CSIRO

Swenson, U. et al (2013) Taxon 62(4): 764.

Common name

Big Leaf Planchonella; Boxwood, Pink; Pink Boxwood


Exudate rather slow and meagre. Lenticels rather large and conspicuous, particularly on large trees. White, granular stripes in the outer blaze.


Leaf bearing twigs rather stout, about 6-8 mm diameter. Leaf blades rather large, about 10-20 x 5-7 cm, lateral veins curved throughout their length but not forming distinct loops. Leaves clustered towards the ends of the twigs. Petioles produce a milky exudate.


Sepals broadly lanceolate, about 5-6 x 3-4 mm, sparse prostrate hairs on the outer surface, almost glabrous on the inner surface. Corolla about 9-11 mm long. Stamens inserted slightly above the middle of the corolla, filaments about 1.5 mm long, anthers about 1.5 mm long. Staminodes linear, about 1.5 mm long. Ovary sericeous, about 1-1.5 mm long. Style about 8 mm long, sericeous in the lower half.


Fruits ellipsoid, about 50-60 x 35-45 mm. Seeds 1-3 per fruit, obovoid, laterally compressed, about 35-40 x 15-18 x 9-12 mm. Testa hard and woody, hilum about 3 mm wide, slightly shorter than the seed.


First pair of leaves elliptic, both the upper and lower surfaces sparsely clothed in short hairs. Cotyledons ovate or obovate, slightly unequal-sided, about 45-55 mm long, midrib raised on the upper surface. At the tenth leaf stage: leaf blade narrowly obovate-elliptic, apex acuminate, base attenuate, glabrous on the upper surface, about 10-12 lateral veins each side of the midrib, curved but not forming loops inside the blade margin; petiole, stem and terminal bud clothed in short prostrate, brown hairs. Seed germination time 17 to 25 days.

Distribution and Ecology

Endemic to NEQ, restricted to the area between the Daintree River and the southern edge of the Atherton Tableland. Altitudinal range from 150-1100 m. Grows in well developed rain forest but is more frequently found in mountain rain forest.


Planchonella macrocarpa P.Royen, Blumea 8: 320 (1955), Type: Queensland. Cook District, Kaban, Pearson Brothers s.n. (BRI). Beccariella macrocarpa (P.Royen) Swenson, Bartish & Munzinger, Cladistics 23: 221 (2007). Pouteria pearsoniorum Jessup, Austrobaileya 6: 163 (2001). Type: Queensland, Kaban, Pearson brothers s.n., holo: BRI; iso: L.

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