Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Singapore Botanic Gardens' has mentioned 'Plant' in the following places:
Occurrence Sentence Text Source
It played a pivotal role in the region's rubber trade boom in the early twentieth century, when its first scientific director Henry Nicholas Ridley, headed research into the plant's cultivation.
Today, it has the largest collection of tropical plant specimens.
Criterion (ii): The Singapore Botanic Gardens has been a centre for plant research in Southeast Asia since the 19th century, contributing significantly to the expansion of plantation rubber in the 20th century, and continues to play a leading role in the exchange of ideas, knowledge and expertise in tropical botany and horticultural sciences.
The authenticity of material remains in the property is illustrated by the well-researched historic trees and other plantings (including historic plant specimens), historic elements of the designed spatial lay-out, and the historic buildings/structures which are being used for their original purposes or adapted to new uses that are compatible with their values.