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Type: Article
Published: 2021-03-19
Page range: 177–183
Abstract views: 25
PDF downloaded: 3

Clerodendrum angustipetalum, a new species of Clerodendrum (Lamiaceae) from Thailand

Division of Biological Science, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla, 90112, Thailand
Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, UK
Division of Biological Science, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla, 90112, Thailand
Lamiaceae Clerodendrum new species southern Thailand Narathiwat Province

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.