Andriamiarisoa, R.L., M.N. Rabarimanarivo & S. Porembski (2023). A new species of Linderniella (Linderniaceae) from central Malagasy granitic inselbergs. Candollea 78: 11–15. In English, English and French abstracts.

A rupicolous, resurrection, inselberg specialist plant is newly described and illustrated. Linderniella porembskii Andriamiar. & Rabarim. (Linderniaceae) is restricted to central Malagasy granitic inselbergs in the Amoron'i Mania Region. It differs from the other Malagasy species of the genus by its habit with dense and richly branched stems, decumbent to erect, and by being glabrous to glabrescent and having obovoid-acuminate capsule. A detailed description of the species is provided, accompanied by illustrations and an identification key to the Malagasy species of the genus. The new species is assessed as “Endangered” using to IUCN Red List Categories.

Submitted on August 3, 2021. Accepted on January 19, 2023. First published online on March 28, 2023.

Andriamiarisoa, R.L., M.N. Rabarimanarivo & S. Porembski (2023). Une nouvelle espèce de Linderniella (Linderniaceae) des inselbergs granitiques du centre de Madagascar. Candollea 78: 11–15. En anglais, résumés anglais et français.

Une plante rupicole, reviviscente, spécialistes des inselbergs est nouvellement décrite et illustrée. Linderniella porembskii Andriamiar. & Rabarim. (Linderniaceae) est restreinte aux inselbergs granitiques du centre de Madagascar, dans la Région d'Amoron'i Mania. Elle se distingue des autres espèces malgaches du genre par son port herbacé avec des tiges richement ramifiées et touffues, décombantes et dressées, des plantes glabres à glabrescentes et sa capsule obovoïde-acuminée. Une description détaillée de l'espèce est fournie, accompagnée d'illustrations et d'une clé d'identification des espèces malgaches du genre. La nouvelle espèce est considérée comme “En danger” selon les Catégories de la Liste rouge de l'UICN.

Barriera, G. (2023). Taxonomy and nomenclature of South American Aquifoliaceae I: Ilex from Ecuador with the description of two new taxa. Candollea 78: 53–78. In English, English and Spanish abstracts. DOI: http://dx.doi.org/10.15553/c2023v781a6

Ilex L., the only genus of the family Aquifoliaceae, is represented by 500–600 species. It is distributed nearly worldwide but mainly in tropical and subtropical regions. In Ecuador it is mainly found in the Andean region, thriving in the montane forest and subparamo ecosystems. A revision of the Ecuadorian species was undertaken in the framework of the Flora of Ecuador. The taxonomic and nomenclatural results are presented here. Thirty-three (33) Ilex taxa (32 species and one variety) are recognized in Ecuador. Among all the taxa linked to Ecuador, holotypes for 51 names have been located, 23 names are lectotypified, one name is neotypified, and 26 new synonyms are proposed. Two new taxa are described and illustrated: I. cochlearifolia Schlüssel & Barriera and I. laurina var. tenuifolia Barriera.

Received: October 6, 2022; Accepted: April 11, 2023; First published online: May 31, 2023

Barriera, G. (2023). Taxonomía y nomenclatura de Aquifoliaceae en Sudamérica I: Ilex del Ecuador con la descripción de dos nuevos táxones. Candollea 78: 53–78. En inglés, resúmenes en inglés y español. DOI: http://dx.doi.org/10.15553/c2023v781a6

Ilex L., el único género de la familia Aquifoliaceae, está representado por 500–600 especies. Se distribuye casi en todo el mundo, pero principalmente en las regiones tropicales y subtropicales. En Ecuador se encuentra principalmente en la región andina, creciendo en los ecosistemas de bosque montano y subpáramo. Se realizó una revisión de las especies ecuatorianas en el marco de la Flora of Ecuador. Los resultados taxonómicos y nomenclaturales se presentan aquí. Se reconocen 33 táxones (32 especies y una variedad) en Ecuador. Se han localizado los holotipos para 51 nombres, así como 23 nombres son lectotipificados, uno es neotipificado y 26 nuevos sinónimos propuestos. Se describen e ilustran dos táxones nuevos: I. cochlearifolia Schlüssel & Barriera e I. laurina var. tenuifolia Barriera.

Cristofolini, G. (2023). Caspar Bauhin's contribution to a historical herbarium stored in Bologna. Candollea 78: 33–51. In English, English abstract.

A historical herbarium stored in the herbarium of the Bologna University [BOLO], putatively ascribed to the Swiss botanist Caspar Bauhin (1560–1624), was examined with a focus on the information contained in the annotations to the specimens, in particular to the bibliographic references, in order to assess the time of collection of each specimen and to identify its origin. The analysis revealed that the herbarium includes specimens collected between the middle of the 16^th century and the first decades of the 17^th century, from more than one collector, including at least one learned scholar, and one or more inexperienced botanists. The identification of the authors, however, is hindered by the fact that their original inscriptions were destroyed after having been copied by a scribe. Nevertheless, among a great deal of poorly annotated material, four specimens could be confidently ascribed to Caspar Bauhin, while a further 15 might plausibly come from the same source. The hypothesis that his brother Johann also contributed some specimens, as suggested by previous studies, although not excluded, seems insufficiently supported. There is convincing evidence that the specimens ascribed to Bauhin were collected after 1596, and sent to Ulisse Aldrovandi (1522–1605) in Bologna before 1605. The whole herbarium, however, was not assembled in its present form before 1623. Most likely, it was Bartolomeo Ambrosini (1588–1657), lecturer in botany in Bologna at that time, who gathered a number of exsiccata collected or received during Aldrovandi's lifetime, and then arranged for them to be glued on paper sheets and labelled by a scribe. In doing so, the original labels were lost, and with them the possibility of identifying the authors with certainty.

Submitted on October 10, 2022. Accepted on February 2, 2023. First published online on March 28, 2023.

Eggenberg, S., L. Champoud, M. Leibundgut, C. Parisod, L. Wyss & G. Kozlowski (2023). Calamagrostis lonana (Poaceae): a new grass species from the Pennine Alps (Switzerland). Candollea 78: 1–9. In English, English and French abstracts.

Calamagrostis lonana Eggenb. & Leibundg. (Poaceae) is described as a new alpine grass species from the Pennine Alps. Unlike other Central European Calamagrostis Adans. species, it is only 13–18 cm high and has so far been found only on the high plateaus of the Pas de Lona, along the Torrent de Lona. Compared to similar species, the panicle is only faintly tinged purplish, has remarkably short panicle branches, and thus remains narrow and elongated even when open. The spikelets show callus hairs that only reach about halfway up the lemmas, and these have a short, dorsal awn. The species is probably closely related to the arctic C. stricta (Timm) Koeler, which has only a few relict occurrences in Central Europe. However, it is morphologically well separable. The morphological description of the species is completed by information on the distribution, habitat, soil conditions, and potential threats of C. lonana.

Submitted on April 15, 2022. Accepted on December 14, 2022. First published online on March 28, 2023.

Eggenberg, S., L. Champoud, M. Leibundgut, C. Parisod, L. Wyss & G. Kozlowski (2023). Calamagrostis lonana (Poaceae): une nouvelle espèce de graminée des Alpes pennines (Suisse). Candollea 78: 1–9. En anglais, résumés anglais et français. DOI: http://dx.doi.org/10.15553/c2023v781a1

Calamagrostis lonana Eggenb. & Leibundg. (Poaceae) est décrite comme une nouvelle graminée alpine des Alpes pennines. Contrairement aux autres espèces de Calamagrostis Adans. d'Europe centrale, elle ne mesure que 13–18 cm de haut et n'a été trouvée jusqu'à présent que sur les hauts plateaux du Pas de Lona, le long du Torrent de Lona. Par rapport aux espèces proches, la panicule n'est que faiblement teintée de violet, possède des branches paniculaires remarquablement courtes, et reste donc étroite et allongée même lorsqu'elle est ouverte. Les épillets présentent des poils sur leurs callus qui n'atteignent qu'environ la moitié des lemmes et ceux-ci ont une courte arête dorsale. L'espèce est probablement proche de l'espèce arctique C. stricta (Timm) Koeler, qui n'a que quelques occurrences reliques en Europe centrale. Cependant, elle est morphologiquement bien distincte. La description morphologique de l'espèce est complétée par des informations sur sa distribution, son habitat (dont les conditions de sol) et les menaces potentielles qui pèsent sur C. lonana.

Firat, M. & H. Eroğlu (2023). Hypericum celikaensis (Hypericaceae), a new species from southeastern Anatolia (Adıyaman–Turkey). Candollea 78: 79–87. In English, English abstract. DOI: http://dx.doi.org/10.15553/c2023v781a7

A new species, Hypericum celikaensis Fırat & Eroğlu, belonging to section Arthrophyllum Jaub. & Spach, is described and illustrated from Çelikhan/Adıyaman Province, Turkey. The species is similar to H. rupestre Jaub. & Spach and H. cardiophyllum Boiss. However, it is easily distinguished from H. rupestre by its two-lined stem and the free sepals (at base) with fewer black glands. It differs from H. cardiophyllum in having sessile black glands on sepals and asymmetrically retuse petals. In addition, the pollen and the seeds of both H. celikaensis and H. rupestre are characterized. An amended identification key to the species of Hypericum sect. Arthrophyllum in Turkey is provided, as well as detailed pictures of living plants.

Received: October 4, 2022; Accepted: May 16, 2023; First published online: June 13, 2023

Philpott, L. & W.L. Applequist (2023). Casearia razakamalalae (Salicaceae), a new species endemic to southeastern Madagascar. Candollea 78: 27–32. In English, English and French abstracts.

Casearia Jacq. (Salicaceae) has relatively few species in Madagascar, but its taxonomy has not yet been well resolved. A new species, C. razakamalalae Philpott & Appleq., is herein recognized. Casearia razakamalalae is notable for its papillate indument on several parts and its usually thin, pale-drying leaves on which even the smallest veinlets are clearly visible. It is endemic to humid forests of southeastern Madagascar and is found mostly within the Andohahela National Park. It is assessed as “Endangered” based on IUCN criteria.

Submitted on November 11, 2022. Accepted on January 19, 2023. First published online on March 28, 2023.

Philpott L. & W.L. Applequist (2023). Casearia razakamalalae (Salicaceae), une espèce nouvelle endémique du sud-est de Madagascar. Candollea 78: 27–32. En anglais, résumés anglais et français.

Casearia Jacq. (Salicaceae) possède relativement peu d'espèces à Madagascar, mais sa taxonomie n'a pas encore été bien résolue. Une nouvelle espèce, C. razakamalalae Philpott & Appleq. est reconnue ici. Casearia razakamalalae se distingue par son indument papillaire sur plusieurs parties. Ses feuilles sont généralement fines, pâles en séchant où même les plus petites veinules sont clairement visibles. Elle est endémique des forêts humides du sud-est de Madagascar et se trouve principalement dans le Parc National d'Andohahela. Elle est considérée comme étant «En Danger» selon les critères de l'UICN.

Pignal, M., C. Laudereau & P.-L. Laudereau (2023). Revision of the genus Porpax (Orchidaceae, Podochileae) in New Caledonia. Candollea 78: 17–26. In French, English and French abstracts.

A taxonomic revision of the genus Porpax Lindl. (Orchidaceae, Podochileae) in New Caledonia is presented. Four species are recognised, three of which are newly described. The new species are vegetatively similar to P. karikouyensis (Schltr.) Schuit. et al. but differ in flower colour, size and shape. Porpax angelinae M. Pignal, Laud. & P.-L. Laud. has burgundy red flowers, horizontally oriented petals, and a very short inflorescence; P. ceciliae M. Pignal, Laud. & P.-L. Laud. has yellow, semi-open flowers, and a tubercled labellum below; P. lydwineae M. Pignal, Laud. & P.-L. Laud. bears larger, rounded, bright red tepals. The conservation status according to IUCN criteria shows that three out of the four species are threatened. A dichotomous key to Porpax for New Caledonia is provided. A lectotype for the name Eria karikouyensis Schltr. is also designated.

Submitted on August 28, 2022. Accepted on January 19, 2023. First published online on March 28, 2023.

Pignal, M., C. Laudereau & P.-L. Laudereau (2023). Révision du genre Porpax (Orchidaceae, Podochileae) en Nouvelle-Calédonie. Candollea 78: 17–26. En français, résumés anglais et français.

Une révision taxonomique du genre Porpax Lindl. (Orchidaceae, Podochileae) en Nouvelle-Calédonie est présentée. Quatre espèces sont reconnues dont trois nouvellement décrites. Les nouvelles espèces sont végétativement similaires à P. karikouyensis (Schltr.) Schuit. et al. mais diffèrent par la couleur, la taille et la forme des fleurs. Porpax angelinae M. Pignal, Laud. & P.-L. Laud. a des fleurs rouge bordeaux, des pétales orientés horizontalement et une inflorescence très courte; P. ceciliae M. Pignal, Laud. & P.-L. Laud. a des fleurs jaunes, semi-ouvertes et un labelle tuberculé en dessous; P. lydwineae M. Pignal, Laud. & P.-L. Laud. possède des tépales plus grands, arrondis et rouge vif. Le statut de conservation selon les critères de l'UICN montre que trois espèces sur quatre sont menacées. Une clé d'identification du genre Porpax pour la Nouvelle-Calédonie est proposée. Un lectotype pour le nom Eria karikouyensis Schltr. est aussi désigné.