A new combination and change in rank in Polycarpon (Caryophyllaceae), endemic to California, U.S.A., and Mexico

The name Polycarpon depressum Nutt. (Caryophyllaceae) is here investigated and lectotypified. According to a recent molecular investigation and based on the morphology and ecology of the taxon, the new combination and change in rank for P. tetraphyllum (L.) L. subsp. depressum (Nutt.) Iamonico are proposed for these plants endemic to California, U.S.A., and northern Mexico. A description of the subspecies is provided as is a comparison with the similar taxa P. tetraphyllum subsp. tetraphyllum, P. tetraphyllum subsp. alsinifolium (Biv.) Ball, and P. tetraphyllum subsp. diphyllum (Cav.) O. Bolòs & Font Quer

Taxonomical, Morphological, Ecological And Chorological Notes On Oxybasis Chenopodioides And O. Rubra (Chenopodiaceae) In Italy

Abstract On the basis of floristic surveys, examination of herbarium specimens and review of literature, notes on the taxonomy, morphology, and ecological features are given of Oxybasis chenopodioides and morphologically fairly similar Oxybasis rubra. Their distributions in Italy according to Provinces are discussed and mapped

Nomenclatural notes on some annual mallows (Malvaceae)

A nomenclatural study concerning the annual mallows (Lavatera sect. Lavatera) is presented here. The names Lavatera africana, L. biennis, L. grandiflora, L. moschata by Miergues, L. punctata, L. punctata var. maroccana, L. rosea, L. trimestris var. brachypoda, L. trimestris var. trimestris f. colorata, Olbia deflexa, and Stegia lavatera are investigated. Lavatera grandiflora, L. rosea, L. moschata by Miergues, Olbia deflexa, and Stegia lavatera are illegitimate names according to Arts. 52.1, 52.2 or 53.1 of the ICN. The other names are valid and legitimate and are lecto- or neotypified on specimens preserved in the herbaria BM, LE, MAF, MPU, P, and TO. Three species belonging to Lavatera sect. Lavatera are accepted: L. trimestris s.lat., L. maroccana, and L. punctata (= Olbia deflexa, nom. superfl. et illeg. = L. biennis). Three varieties are here recognized for L. trimestris: var. trimestris (≡ Malva rosea, nom. superfl. et illeg. Lavatera grandiflora, nom. superfl. et illeg. Stegia lavatera, nom. superfl. et illeg. = L. africana = L. trimestris var. trimestris f. colorata), var. brachypoda, and var. moschata (a new combination)

Alien taxa of the tribe Senecioneae (Asteraceae) in Italy: a nomenclatural synopsis

A nomenclatural synopsis of the alien species belonging to the tribe Senecioneaecurrently recorded in Italy (8 species) is presented. Te occurrence at the regional level, as well as the level of naturalization and ecological notes for each taxon are provided. A diagnostic key of the non-native Italian species is also given. The names Cineraria petasitis (now Senecio petasitis), Delairea odorata, Eupatorium auriculatum (now Senecio deltoideus), E. fulvum, Mikania ternifolia var. senecioides, Senecio andryaloides, S. angulatus, and S. leucanthemifolius subsp. vernalis are typifed on specimens preserved at E, F, P, SBT, and UPS, and on images by Lamarck, Lemaire, Sims, and Waldstein & Kitaibel. Te type of the name S.pterophorus, as indicated by Iamonico in 2015, was wrongly reported as holotype and need to be corrected to lectotype according to the Art. 9.9 of ICN. The names Cacalia auriculata, Cacalia fmbrillifera (nom. nov., nom. superfl. et illeg. pro Eupatorium auriculatum), Cacalia scandens by Tunberg, Cineraria crassiflora, Eupatorium scandens by Link (nom. illeg.), Mikania senecioides (nom. illeg.), Senecio auriculatum, and Senecio mikanioides are also investigated and discussed

First record of a naturalized population of the tropical Colocasia esculenta (Araceae) in Italy, and clarifications about its occurrence in southeastern Europe

Colocasia esculenta (L.) Schott is an emergent aquatic and semi-aquatic species native to Asia, where it grows in tropical and subtropical areas. This species is widely cultivated for its edible corm and is considered as alien in various parts of the world, becoming sometimes invasive (e.g., in Spain), and in these areas eradication should be carried out. As part of ongoing studies on Araceae, in 2015 a population of C. esculenta was discovered in Rome (central Italy), where it grows along ditches. This is the first record of a naturalized population in Italy. A comprehensive view of this species in Italy and Europe was given, with clarifications about its occurrence in the Balkans, where C. esculenta was excluded from Bosnia and Herzegovina, Croatia, Montenegro, North Macedonia, Serbia, and Slovenia. A morphological description based on the population found and considerations of its ecology and the climatic conditions at the Roman site are provided

Habrosia (Caryophyllaceae) a monotypic genus endemic to Western Asia: morphological and molecular remarks

Habrosia (Sagineae, Caryophyllaceae) is a genus that includes only H. spinuliflora, a species occurring in Iran, Iraq, Syria, Lebanon, and Turkey (Irano-Turanian floristic chorological element). Based on the available molecular data published in 2011, Habrosia appears to be nested in a Minuartia-clade, which includes taxa currently recognized under the genus Sabulina. Consequently, Habrosia should be treated as a genus to be included in Sabulina. However, the molecular tree published in 2011 considered only 9 Sabulina members whereas, according to the current concept, Sabulina is a genus comprising about 65 species. Unfortunately, the molecular phylogeny including a larger Sabulina sample published in 2014 did not include H. spinuliflora and the taxonomic position of Habrosia remains, therefore, uncertain. With the aim of verifying the correct position of Habrosia in the tribe Sagineae with respect to its relationship to Sabulina, a comprehensive molecular investigation based on ITS sequences, linked to detailed morphological data, is presented. The results obtained revealed that Habrosia is not part of Sabulina. A detailed description of H. spinuliflora, its ecological preference, and a distribution map are provided. Eventually, the name Arenaria spinulifolia (basionym of H. spinuliflora) is lectotypified on a specimen preserved at G (barcode G00212963)

Taxonomic revision of the genus Alternanthera (Amaranthaceae) in Italy

A taxonomic revision of the genus Alternanthera (Amaranthaceae) in Italy is here presented. Field surveys were carried out during the period 2007–2013. Thirty-six herbaria (both European and American) were consulted as well as extensive literature was analyzed. Four taxa are recognized, all of them to be considered aliens native to South America. Information about nomenclature (accepted names, main synonyms, and types), morphology, chromosome number, alien status (at national and regional levels), occurrence in Italy (at regional and provincial scale), ecology (preferential habitat, phenology, and elevation), taxonomical notes, and Italian vernacular names were provided for each taxon. A diagnostic key was given. For the nomenclatural purposes the generic name Alternanthera and its type was discussed, and the names A. paronychioides and A. pungens were studied and typified (lecto- and neotype, respectively) on specimens preserved at PH and P

Lectotypification of Linnaean names in Tussilago (Asteraceae)

The typification of the names Tussilago alpina and T. petasites (Asteraceae) are discussed. Specimens from the Burser Herbarium (UPS) are designated as lectotypes

Nomenclatural notes about the names in Amaranthaceae published by Roberto de Visiani

The names in Amaranthaceae published by R. de Visiani are investigated. Amaranthus gangeticus var. cuspidatus is a nomen nudum and thus invalid according to Art. 38.1a of the ICN. Amaranthus hierichuntinus, Atriplex patula var. hastifolia, and Chenopodium album var. oblongum are lectotypified, respectively,on a specimen preserved at PAD, and illustrations by Scopoli and Vahl. We here propose to synonymyze the three names (new synonymies) respectively with Amaranthus graecizans subsp. graecizans, Atriplex patula subsp. patula, and the typesubspecies of C. album. For nomenclatural purposes, also the name C. lanceolatum Willd. (heterotypic synonym of C. album subsp. album) is investigated and lectotypified, on a specimen preserved at B

Nomenclatural survey of the genus Amaranthus (Amaranthaceae). 11. Dioecious Amaranthus species belonging to the sect. Saueranthus

A nomenclatural study of Amaranthus names, linked to the dioecious taxa belonging to the sect. Saueranthus (subgen. Acnida), was carried out. All studied names are validly published but in need of nomenclatural clarifications. Lectotypes are designated for A. greggii var. muelleri (NY), whereas for A. ambigens, A. annectens, A. arenicola, A. myrianthus, and A. watsonii holotypes were cited (deposited at US, BM, GH, and US). Isotypes where found for A. ambigens (one specimen at NY), A. myrianthus (five specimens at GH, M, MO, RM, and US), and A. arenicola (three specimens at KSC, MO, and US), whereas for A. watsonii two isotypes were traced at US. A new synonymy, A. arenicola = A. myrianthus, is proposed, the latter name having nomenclatural priority to the former one. Based on preliminary taxonomic observations, two varieties are recognized under A. greggii, var. greggii and var. muelleri, which differ from each other on the ratio tepals/fruit (about 2/3 in var. muelleri vs. about 1 in var. greggii)