biostudies-literatureUnknown215Triyutthachai NThree new species of <i>Elatostema</i> (Urticaceae) from Thailand, <i>E.kaweesakii</i> Triyutth. & L.F.Fu, <b>sp. nov.</b>, <i>E.rubricaule</i> Triyutth. & L.F.Fu, <b>sp. nov.</b> and <i>E.saxatile</i> Triyutth. & L.F.Fu, <b>sp. nov.</b>, are newly described and illustrated. These new species can be distinguished by the presence of rhizome. <i>Elatostemakaweesakii</i> is similar to <i>E.atroviride</i>. <i>Elatostemakaweesakii</i> is a lithophyte growing in limestone crevices. It differs from <i>E.atroviride</i> by its large swollen rhizome, glabrous stem, glabrous receptacle, number of tepal in staminate flower, absence of tepal in pistillate flower, presence of staminodes in pistillate flower and smooth achene. <i>Elatostemarubricaule</i> and <i>E.saxatile</i> are found on sandstone habitats. They have distinct flattened and disk-like rhizome. <i>Elatostemarubricaule</i> is distinguished by its distinct sulcate and reddish stem with flattened and disc-like rhizome and chartaceous leaves with entire margin. <i>Elatostemasaxatile</i> resembles <i>E.bulbiferum</i> but differs by its flattened and disc-like rhizome, acute leaf apex, glabrous receptacle in pistillate inflorescences, presence of staminodes in pistillate flower, and its sandstone habitat. Descriptions, distribution, ecological and phenological data are provided.PhytoKeys37-50https://www.ebi.ac.uk/biostudies/studies/S-EPMC9836403biostudies-literatureThree new species of <i>Elatostema</i> (Urticaceae) from Thailand.PMC9836403Wei YGPornpongrungrueng PTriboun PFu LFTriyutthachai NfalseThree new species of <i>Elatostema</i> (Urticaceae) from Thailand.Three new species of <i>Elatostema</i> (Urticaceae) from Thailand, <i>E.kaweesakii</i> Triyutth. & L.F.Fu, <b>sp. nov.</b>, <i>E.rubricaule</i> Triyutth. & L.F.Fu, <b>sp. nov.</b> and <i>E.saxatile</i> Triyutth. & L.F.Fu, <b>sp. nov.</b>, are newly described and illustrated. These new species can be distinguished by the presence of rhizome. <i>Elatostemakaweesakii</i> is similar to <i>E.atroviride</i>. <i>Elatostemakaweesakii</i> is a lithophyte growing in limestone crevices. It differs from <i>E.atroviride</i> by its large swollen rhizome, glabrous stem, glabrous receptacle, number of tepal in staminate flower, absence of tepal in pistillate flower, presence of staminodes in pistillate flower and smooth achene. <i>Elatostemarubricaule</i> and <i>E.saxatile</i> are found on sandstone habitats. They have distinct flattened and disk-like rhizome. <i>Elatostemarubricaule</i> is distinguished by its distinct sulcate and reddish stem with flattened and disc-like rhizome and chartaceous leaves with entire margin. <i>Elatostemasaxatile</i> resembles <i>E.bulbiferum</i> but differs by its flattened and disc-like rhizome, acute leaf apex, glabrous receptacle in pistillate inflorescences, presence of staminodes in pistillate flower, and its sandstone habitat. Descriptions, distribution, ecological and phenological data are provided.2022-01-01T00:00:00Z20222025-04-04T18:44:05.337Z2025-04-04T18:44:05.337ZS-EPMC98364033676109410.3897/phytokeys.215.94591