# Camchaya khongchiamensis Chatan & Promprom (Asteraceae: Vernonieae), a New Species From Thailand

## TL;DR

A new plant species, Camchaya khongchiamensis, was discovered in Thailand and compared to a similar species.

## Contribution

The discovery and detailed description of a new plant species from Thailand with morphological and conservation data.

## Key findings

- Camchaya khongchiamensis differs from C. loloana in capitula size, corolla lobe, and floret count.
- The new species has distinct anther and style features compared to its closest relative.
- A conservation assessment under IUCN criteria was conducted for the new species.

## Abstract

Camchaya khongchiamensis Chatan & Promprom (Asteraceae), a new species from Ubon Ratchathani Province, Thailand, is described and illustrated. It is similar to C. loloana, but clearly different from C. loloana by having a larger size of capitula, involucre, receptacle, and corolla lobe. In addition, it mostly has fewer florets (18–40 [−50]) per capitulum; lower haft whitish, upper haft purplish corolla tubes; sagittate base anthers; and white except for the purple near apex style. A distribution map, pollen morphology, and a table with comparative morphological characters of the new species and its closest relative are provided, as well as the preliminary conservation assessment under the IUCN criteria.

Camchaya khongchiamensis Chatan & Promprom (Asteraceae), a new species from Ubon Ratchathani Province, Thailand. A distribution map, pollen morphology, and a table with comparative morphological characters of the new species and its closest relative are provided, as well as the preliminary conservation assessment under the IUCN criteria.