Macrosolen formosus

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Macrosolen formosus


Glabrous. Leaves opposite; lamina narrowly ovate to ovate, 10-16(-30) by 5-13 cm, cuneate at the base to a petiole 4-12 mm long (in Peninsular Malaysian specimens sometimes truncate or cordate at the base and subsessile), acuminate and acute at the apex, slightly lustrous above, dull below; venation pinnate with the midrib and the main laterals distinct on both sides. Inflorescences at the nodes and sometimes along the inter- nodes and on the epicortical runners, a raceme (sometimes subumbellate or umbellate) of 1-4 opposite pairs of flowers; axis 5-17 mm long; pedicels 3-7 mm long; bracts 1-2 mm long, rounded, the laterals sometimes connate.


Asia-Tropical: Borneo present; Jawa (Jawa present); Malaya (Peninsular Malaysia present); Sumatera (Sumatera present)
Malesia: Sumatra, Peninsular Malaysia, Borneo, Java.


Peninsular Malaysian specimens with large subsessile cordate leaves may be the result of introgression from species such as Macrosolen acunae.


Backer & Bakh.f. 1965 – In: Fl. Java. p 69