In the forests of Arunachal Pradesh, amidst the dense greenery by a stream at an altitude of about 410 meters, scientists have discovered a tree that has led to a reevaluation of an entire plant genus. This evergreen plant, up to seven meters tall, with creamy-yellow flowers whose inner petals are adorned with purple stripes, turned out to be the first known representative of the genus Mitrephora capable of bearing both male and bisexual flowers on a single specimen simultaneously.
Previously, all species of this genus, distributed in the tropics of South and Southeast Asia and Australia, were considered strictly dioecious or hermaphroditic. The new find—Mitrephora rashmiae—demonstrates a strategy known as andromonoecy. This approach allows the plant to respond flexibly to pollination conditions, which is particularly valuable in environments with a limited number of pollinators. The discovery is described in the journal Feddes Repertorium, based on expeditions between Daporijo and Taliha in the Upper Subansiri district.
Until now, only two species of Mitrephora were known in the Himalayan biodiversity hotspot. The new tree is the second, expanding the genus's range and showing how little even relatively accessible areas of northeastern India are studied. Researchers Navendu Page, Shivam Kishwan, and Tejas Thackeray emphasize that despite decades of botanical work, the region continues to present surprises.
So far, only one specimen has been found, hence the species has been assigned a preliminary status of Data Deficient. Scientists note the need for further searches to determine if other populations have survived. The tree differs from its closest relatives by having larger leaves, a greater number of flowers in an inflorescence, and distinct fruit characteristics. The name Mitrephora rashmiae is given in honor of Rashmi Thackeray for her contribution to fostering interest in nature and supporting research.
The discovery raises important questions about habitat conservation. The forests of Arunachal Pradesh are under pressure from economic activities, and the loss of even one species before its full study means losing potential knowledge about adaptation mechanisms. As an old saying goes, 'a small thing can be of great value'—here it refers not to size, but to the uniqueness of the biological solution.
Evidently, such findings remind us that nature is not exhausted by our maps and classifications. Each new tree with an unexpected reproductive strategy is an invitation to look more closely at what grows nearby and to protect the territories where similar surprises might still be hidden.
