Flora Singapura





 Alstonia scholaris

Common Names: 
Indian Pulai
Although Alstonia scholaris is not a native of Singapore, it has been so widely planted in Nature Parks and as a roadside tree that it is probably the most commonly encountered Pulai in Singapore. In an unconstrained environment the Indian Pulai will exhibit the pagoda form with three or more layers of foliage and when flowering the night air is filled with its sickly sweet scent. In January 2010  this species flowered simultaneously, subsequently sporadic flowering has occurred on several occasions during the year.  White moths have been observed to attend the flowers.
Unambiguous identification of this species is achieved by inspection of the enlarged pointy stipule on the end of the stem. This stipule can be felt by running your finger along the top side of the stem - only A. scholaris has this feature. A great place to compare A. scholaris and A. angustiloba is the along the road outside Bukit Batok Nature Park.  The front rows of Pulai trees nearest the road with the light grey bark are A. scholaris, while the Pulai trees behind these with the darker bark are A. angustiloba
Flowering branch - roadside @ Bukit Timah
A closer look at the flower heads.

Flowering tree at Bukit Batok Nature Park
Closeup of the flower stalks.
Fresh seed-pod.
Light gray bark.
Characteristic stipule on the leaf stem
Fruiting is as prolific as the flowering