1,721,396 research outputs found
A note on the author citation and typification of Cineraria aurantiaca Hoppe (Tephroseris integrifolia subsp. aurantiaca; Asteraceae)
No full textBartolucci, Fabrizio, Villani, Mariacristina, Galasso, Gabriele (2021): A note on the author citation and typification of Cineraria aurantiaca Hoppe (Tephroseris integrifolia subsp. aurantiaca; Asteraceae). Phytotaxa 512 (4): 297-299, DOI: 10.11646/phytotaxa.512.4.6, URL: http://dx.doi.org/10.11646/phytotaxa.512.4.
A taxonomic revision of the Siler montanum group (Apiaceae) in Italy and the Balkan Peninsula
Full text linkAbstract: A morphometric-based taxonomic revision of the Siler montanum group (Apiaceae) from Italy and the Balkan Peninsula was carried out. Multivariate and univariate analyses were performed on 47 morphological characters including seven ratios, and based on the study of 328 dried herbarium specimens. According to our results, the characters employed in the study revealed their suitability as key characters for the examined taxa. A taxonomic treatment was presented and a new diagnostic key to the S. montanum group is also provided for Italy and Balkan Peninsula. Ten taxa were recognized within the group, and among them three new subspecies were described: S. montanum subsp. apuanum, S. montanum subsp. corrasianum and S. montanum subsp. ogliastrinum. Furthermore, three new combinations were proposed: S. zernyi subsp. laeve, S. zernyi subsp. ochridanum and S. montanum subsp. stabianum. Six names were lectotypified: Laserpitium garganicum var. balcanicum, L. garganicum var. laeve, L. garganicum var. scabrum, L. siculum var. stabianum, L. siler var. ovalifolium and Ligusticum garganicum. Occurrences were confirmed for Siler zernyi subsp. zernyi in Greece and S. zernyi subsp. laeve in North Macedonia. Occurrences were excluded for S. montanum subsp. garganicum in Greece and North Macedonia and S. montanum subsp. siculum in C and S Italy. Citation: Conti F., Bartolucci F., Bacchetta G., Pennesi R., Lakušić D. & Niketić M. 2021: A taxonomic revision of the Siler montanum group (Apiaceae) in Italy and the Balkan Peninsula.-Willdenowia 51: 321-347. Version of record first published online on 16 November 2021 ahead of inclusion in December 2021 issue
Lectotypification of the name Androsace mathildae Levier (Primulaceae)
No full textAndrosace mathildae Levier (1877: 43) is endemic to Abruzzo (central Italy; Bartolucci et al. 2017, 2018), occurring in the Gran Sasso and Monti della Laga national Park (Conti & Bartolucci 2016) and in the Majella national Park (F. Conti and collaborators, submitted), on limestone rocks and screes between 2,350 and 2,900 m a.s.l. This species is listed in Annexes II and IV of the Habitats Directive 92/43/ECC (Rossi et al. 2016), and, according to the IUCN criteria, is evaluated as Least Concern (LC; Rossi et al. 2013, Orsenigo et al. 2018). Androsace mathildae is also included in the project LIFE15 NAT/IT/000946 “Safeguard and valorization of the plant species of EU interest in the Natural Parks of the Abruzzo Apennine” (Di Martino et al. 2016).The present contribution is part of an ongoing project promoted by the Italian Botanical Society aimed at recognizing and typifying all the taxa described from Italy, in order to increase their systematic knowledge and promote further studies (Domina et al. 2012, Passalacqua et al. 2014, Peruzzi et al. 2015, Brundu et al. 2017). The name Androsace mathildae, to the best of our knowledge, was not yet typified (Peruzzi et al. 2015)
Anthyllis apennina (Fabaceae), a new species from central Apennine (Italy)
Full text linkA new species of Anthyllis endemic to central Apennine growing in dry pastures on limestone in the montane belt, within Abruzzo and Lazio administrative regions (central Italy), is here described and illustrated and the IUCN assessment is proposed. This new species belongs to the morphologically very variable Anthyllis vulneraria species complex and it is close to A. pulchella (south-eastern Europe and Caucasus), but it can be clearly distinguished by its smaller flowers, mainly light yellow-coloured, bracts longer than flowers, calyx pink-coloured (usually only at apex) and size of cauline leaves and leaflets. Furthermore, the name A. pulchella is here lectotypified, by a second-step typification, on a specimen preserved at PAD
Notula: 1520. Ornithogalum etruscum subsp. umbratile (Hyacinthaceae). In: Nepi C., Peruzzi L., Scoppola A. (eds.), Notulae alla Checklist della flora italiana: 6
No full textA spatio-temporal model based on discrete latent variables for the analysis of COVID-19 incidence
Full text linkWe propose a model based on discrete latent variables, which are spatially associated and time specific, for the analysis of incident cases of SARS-CoV-2 infections. We assume that for each area the sequence of latent variables across time follows a Markov chain with initial and transition probabilities that also depend on latent variables in neighboring areas. The model is estimated by a Markov chain Monte Carlo algorithm based on a data augmentation scheme, in which the latent states are drawn together with the model parameters for each area and time. As an illustration we analyze incident cases of SARS-CoV-2 collected in Italy at regional level for the period from February 24, 2020, to January 17, 2021, corresponding to 48 weeks, where we use number of swabs as an offset. Our model identifies a common trend and, for every week, assigns each region to one among five distinct risk groups
Typification and taxonomic characterization of Thymus longicaulis C. Presl (Lamiaceae)
No full textThymus longicaulis, described from Sicily by Carl Bořivoj Presl, is a critical Mediterranean species, often confused with other taxa belonging to Th. sect. Serpyllum. In order to preserve the current application of this name, a lecotype is designated. Furthermore a detailed morphological description and information about habitat, phenology, distribution, karyology and taxonomy are provided
Notula: 1455. Sternbergia sicula (Amaryllidaceae). In: Nepi C., Peruzzi L., Scoppola A. (eds.), Notulae alla Checklist della flora italiana: 5
No full textConditional inference for binary panel data models with predetermined covariates
No full textA fixed-effects logit model that accounts for feedback effects of the dependent variable on the covariates is proposed. The model is formulated by including leads of the predetermined covariates among the regressors and it is proved to satisfy certain theoretical properties under some regularity conditions on the distribution of the covariates. Estimation is based on the Conditional Maximum Likelihood (CML) method for the static logit model and the Pseudo-CML (PCML) method for the corresponding dynamic formulation. Both methods have good finite-sample properties even when the required regularity conditions are not satisfied. An application is provided about female labor supply where we jointly account for the predetermined number of children and husbands’ income. Differently from previous studies, it emerges that female employment history does not affect future fertility choices and the husband's earnings, as no evidence of feedback effects is found
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