Phytotaxa <p><strong>Phytotaxa </strong>is world's largest journal in botanical taxonomy. </p> Magnolia press en-US Phytotaxa 1179-3155 <span lang="EN-GB">Authors need to complete and return an </span><span lang="EN-GB"><a href="">Assignment of Copyright</a> </span><span lang="EN-GB">form when a paper is accepted for publication. Authors from institutions that do not allow transfer of copyrights to publishers (e.g. government institutions such as USDA, CSIRO) should attach a copyright waiver or similar document.</span> <p><strong>A lovely new, and potentially medicinal, species of <em>Copaifera</em> (Detarioideae, Fabaceae) from the Brazilian Cerrado supported by anatomical and morphological data</strong></p> <p>A new species of <em>Copaifera</em> from a diversity hotspot in the Brazilian Cerrado is described. <em>Copaifera appendiculata</em> M.J. Silva appears to be endemic of the northern portion of Goiás State, Brazil, and its conservation status is classified as Critically Endangered. It is a dwarf species and can be recognized by a set of characteristics that include: foliar rachis spiny and conspicuously prolonged (the first such report for the genus), leaflets similar in size, usually glabrescent on both surfaces, with planar margins, with discreet or conspicuous translucent points, sepals indumented on both surfaces, fruits glabrous, and seeds with an orange aril. It is compared with similar dwarf species of the genus present in the Cerrado, especially with <em>Copaifera marginata</em>, its closest congener. Also furnished are illustrations, images, information concerning its flowering and fruiting seasons, geographical distribution, as well as preliminary conservation assessments. Examinations of the leaf anatomies of the new species, as well as that of <em>C. marginata</em>, revealed the numbers of layers of palisade parenchyma, the presence of a hypodermis, the numbers of vascular bundles in the petiole, rachis and midrib, as well as their contours, and aspects of the leaf margins. All of those features constitute useful characters to separate the two species. Histochemical tests demonstrated that chemical compounds (e.g., alkaloids, phenolic compounds, and lipids) present in the leaf tissues of both species have potential medicinal properties.</p> MARCOS JOSÉ DA SILVA IGOR SOARES DOS SANTOS Copyright (c) 2022 Phytotaxa 2022-06-23 2022-06-23 552 2 127 150 10.11646/phytotaxa.552.2.1 <p><strong><em>Platessa arborea sp. nov.</em> (Bacillariophyceae): A new tree moss dwelling diatom from the Eastern Himalayas, India</strong></p> <p><em>Platessa</em> <em>arborea sp. nov.</em> new monoraphid diatom species is described from the tree moss habitat of India’s Sikkim state from the Eastern Himalayan biodiversity hotspot. This new species was described based on light and scanning electron micrographs and compared to morphologically similar taxa. <em>Platessa</em> <em>arborea </em>seems to have an affinity for the aerial habitat and has certain unique morphological features distinct from all the other <em>Platessa</em> species, such as its narrowly rounded apices, wide axial area, and the presence of predominantly uniseriate striae with unusually thick striae density. In India, there have been previous reports of some species from the genera <em>Achnanthes</em> and <em>Cocconeis</em>, which have been eventually transferred to the genus <em>Platessa</em>. However, this is the first formal documentation of the <em>Platessa </em>genus from India.</p> SHEENA SHERLY CHERAN RADHAKRISHNAN BALASUBRAMANIAN KARTHICK Copyright (c) 2022 Phytotaxa 2022-06-23 2022-06-23 552 2 151 158 10.11646/phytotaxa.552.2.2 <p><strong><em>Passiflora mistratensis</em>, a new species of <em>Passiflora</em> (Passifloraceae) from Colombia, commonly known from European cultivation</strong></p> <p><em>Passiflora mistratensis</em>, a new species of <em>Passiflora </em>sect. <em>Granadillastrum </em>is described and illustrated. This species has been known for several years from its popular cultivation in European collections and horticulture, however, an official name never was assigned to this new taxon. It is endemic to the Colombian Cauca River valley where it grows in premontane tropical wet cloud forest of the states Valle de Cauca, Risaralda and Antioquia. It is most closely related to <em>Passiflora danielii </em>and <em>Passiflora trisulca, </em>from which it can be readily distinguished by the combination of its unlobed leaves and the notably shorter inflorescence and corni. Its taxonomy, ecology and conservation are discussed in this paper.</p> J.R. KUETHE JOHN VANDERPLANK Copyright (c) 2022 Phytotaxa 2022-06-23 2022-06-23 552 2 159 165 10.11646/phytotaxa.552.2.3 <p><strong><em>Leucas martinicensis</em> (Lamiaceae, Lamioideae), a new naturalized species in Mexico</strong></p> <p>N/A</p> JESÚS GUADALUPE GONZÁLEZ-GALLEGOS HEIKE VIBRANS Copyright (c) 2022 Phytotaxa 2022-06-23 2022-06-23 552 2 166 170 10.11646/phytotaxa.552.2.4