Ophiorrhiza shidiensis is a species of flowering plant in the family Rubiaceae, described as new to science in 2026. It is an erect perennial herb found in the Vijoynagar valley of Changlang district, Arunachal Pradesh, India. The plant takes its name from "Shidi," the traditional word used by the local Lisu (Yobin) community for Gandhigram, the village near where it was first collected.^[1] 

Description

The plant grows upright to about one metre tall and lives for several years, regrowing each season rather than completing its life cycle in one year. Its leaves are notably pale green on the underside. The flowers are tubular and show a gradient of colour: white at the base, shifting to pale pink through the middle of the tube, and finishing with rose-pink tones near the mouth.^[2] 

Researchers confirmed its status as a distinct species by comparing leaf shape, flower structure, and inflorescence arrangement against known members of the genus *Ophiorrhiza*. These physical differences ruled out simple variation within existing species.^[3] 

Habitat and discovery

The species is currently known only from the Indo-Burma biodiversity hotspot in northeastern India. This region remains one of the country's least documented botanical zones, which explains why a plant reaching a full metre in height could go unrecorded until now. Teams first spotted the plants during fieldwork in March 2025, then revisited the sites in April 2026 to gather the material needed for formal study.^[4] 

Naming a plant after a local place-name does more than file paperwork — it records who knew the land first. In this case, the Lisu community's own word for their village became the scientific label.

Related species

phiorrhiza shidiensis was published together with another new species, *Ophiorrhiza pemae*, named in honour of Pema Khandu, Chief Minister of Arunachal Pradesh. While both belong to the same genus and were found in the same district, they differ clearly in growth height, leaf margins, and flower colouration.^[5] 

The genus Ophiorrhiza sits inside Rubiaceae, the large family that also gives us coffee and madder. With hundreds of genera and thousands of species worldwide, the family regularly yields new discoveries in tropical and subtropical Asia.^[6]