# Nymphanthus belliflorus (Phyllanthaceae), a new species from Thailand

## TL;DR

A new water lily species, Nymphanthus belliflorus, has been discovered in northeastern Thailand and is described in this paper.

## Contribution

The paper introduces and formally describes a new species of Nymphanthus from Thailand.

## Key findings

- Nymphanthus belliflorus is most similar to three other Nymphanthus species but is distinguished by unique morphological traits.
- The new species has a swollen stem base, glabrous young branchlets, and distinct floral features.
- The paper provides ecological and conservation information for the newly described species.

## Abstract

Nymphanthus belliflorus, a newly described species from the northeastern part of Thailand, is the most similar to N. chantaranothaii, N. glaucescens and N. huamotensis in having staminate flowers with four sepals bearing long-fimbriate margins and the pistillate flowers composed of 5–6 sepals with long-fimbriate margins. However, it is distinguished by its swollen stem base, young branchlets that are glabrous, disc glands of staminate flowers that are obdeltoid and yellow-reddish in color, long pedicel of pistillate flowers (3.2–4.8 cm long) and fruits (3.5–5.5 cm long). The description, distribution, ecological information and provisional conservation status are provided.