<p><strong><em>Clerodendrum angustipetalum</em>, a new species of <em>Clerodendrum</em> (Lamiaceae) from Thailand</strong></p>

Abstract

Clerodendrum angustipetalum (Lamiaceae), an endemic species to Narathiwat province, southern Thailand, is described and illustrated as a species new to science. It is similar to C. nutans in having an elongate pendulous inflorescence, but essentially differs in the thicker leaf texture (subcoriaceous vs membranaceous), the calyx tube being almost twice as long and the corolla lobes being half as broad. In addition, the new species has longer calyx lobes, corolla lobes and stamens. The conservation status of this species is assessed as Critically Endangered (CR, B2a + b(ii, iii)+C2ai+D) due to being known from a single locality with a small population of less than 50 individuals. A morphological comparison between similar species and an updated key to Clerodendrum species with pendulous inflorescences from southern Thailand is also presented.

Ethnobotanical knowledge of medicinal plants in the Don Pu Ta Forest by Kaloeng Ethnic Group, Sakon Nakhon Province, Northeastern Thailand

“…The photographs of all parts of the plant were taken, and the branches, leaves, flowers, or fruits of each plant were cut using. The plant samples were stored in a plastic bag and numbered with ID for further inquiry with knowledgeable individuals or for additional research by using keys to species of plants and reference books and various botanical documents (e.g., Low et al 2014;Rahman et al 2014;Smitinand 2014;Van Welzen et al 2014;Bongcheewin et al 2015;Esser and Saw 2015;Paton et al 2016;Saensouk et al 2016Saensouk et al , 2018Saensouk et al ,b,c,d, 2022aYe and Xia 2016;Bongcheewin et al 2017;Leeratiwong et al 2017;Chen et al 2018;Rather et al 2018;Souvannakhoummane et al 2018;Boonma and Saensouk 2019;Choopan et al 2019;Ezedin and Weiblen 2019;Saensouk and Saensouk 2019a, b, 2020a,b,c, 2021a,b, 2023Boonma et al 2020aBoonma et al ,b, 2021Chen et al 2020;Rokade et al 2020;Chantaranothai 2021;Esser 2021;Johnson et al 2021;Kumar et al 2021;Lim et al 2021;Priscila et al 2021;Satthaphorn et al 2021;Bongcheewin et al 2022;Chantaranothai et al 2022;Ngernsaengsaruay et al 2022;Ragsasilp et al 2022;…”

Morphological, anatomical, phytochemical, and phylogenetic evidences reveal into a new Derris species (Fabaceae) with rare flowers and reddish midribs, from Peninsular Thailand

“…and C. peninsulare Satthaphorn, A. J. Paton & Leerat. ( Lamiaceae; Satthaphorn et al 2021Satthaphorn et al , 2022 , Goniothalamus roseipetalus Leerat. , Chalermglin & R. M. K. Saunders and G. sukhirinensis Leerat.…”