Despite losing more than 95% of our forests during colonial times, and urbanisation and development since independence in the 1960s, our biodiversity remains resilient. In the last decade or so, over 500 species of plants and animals have been discovered and some thought to be extinct in Singapore were rediscovered by researchers. These species remain vulnerable to the impact of development and climate change. Thus, as part of efforts to transform Singapore into a City in Nature, the National Parks Board (NParks) has been expanding, restoring, and enhancing our natural capital. Singapore's Nature Conservation Master Plan is a key component of these efforts, and one of its thrusts involve conservation of native species through habitat enhancement and species recovery.

Currently, 82 rare and endangered plants are on the Species Recovery Programme. Efforts have been made to collect the seeds, fruits, and other plant material of these species in their natural habitats to be propagated in NParks' Native Plant Centre. These plants will then be reintroduced to parks, gardens, roadsides, and nature reserves. In doing so, the plants' genome and home range are expanded, thereby increasing their chances of survival in the long run.

The four species showcased in this stamp issue are on the Species Recovery Programme and were all found from lowland dipterocarp forests such as at Bukit Timah Nature Reserve and Centr Nature Reserve. Kadsura scandens is a woody rainforest climber that is considered Critically Endangered locally, found only in Bukit Timah Nature Reserve and Central Catchment Nature Reserve. It produces berries with a faint apple-like scent. Similarly, Artocarpus kemando or Squirrel's Jack is considered Critically Endangered locally. It is a forest jackfruit species that is closely related to the common edible jackfruit and chempedak. There is currently a large specimen located in Changi and is conferred the Heritage Tree status by NParks. Piper porphyrophyllum or Tiger's Betel, is another locally Critically Endangered climber with ornamental leaves. The leaves are streaked white and pink along the veins, with a purple underside. Mucuna biplicata or Two-fold Velvet Bean, is a new record found in Singapore and was recently discovered in 2022. The woody vine produces red seed pods and ornamental dark-purple flowers.