Contributo alla conoscenza della Flora dei pascoli erbosi e boschivi di Monterotondo (Roma)

Summary

After having summarly described the ecological conditions of the area of the Roman Province which are studied by the author, he lists the plants collected and adds some critical remarks on the taxonomy. He gives a list of a few taxa, which must be regarded as having been found for the first time in Lazio, or are infrequent in this Province.

The author describes the vegetation of some pastures and woods by means of statistical investigations. Finaly he takes into consideration the reciprocal influence exerted by the various plant-communities.     

Nuovo contributo alla conoscenza delle Laboulbeniali (Ascomycetes) parassite di Stafilinidi italiani (Insecta,Coleoptera)

Abstract

A new contribution to the knowledge of Laboulbeniales (Ascomycetes) parasitic on Italian Staphylinidae (Insecta, Coleoptera).—Two new Laboulbeniales occurring on Italian Staphylinidae are described: Camptomyces europaeus, parasitic on Astenus thoracicus Baudi (Paederinae) and Corethromyces sardous, parasitic on Pseudobium labile (Er.) (Paederinae). Furthermore, the following species are reported for the first time in Italy: Compsomyces verticillatus (Thaxt.), Haplomyces texanus Thaxt., Smeringomyces anomalus (Thaxt.) and Teratomyces actobii Thaxt.     

Primo contributo alla conoscenza dei Micromiceti dell'Africa orientale

Summary The author presents the list of the fungus species gathered in Scioa country, in Amara and chiefly in the countries of Galles and Sidamo (East-Africa).

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Il presente lavoro, già pronto nella seconda metà del 1940, non potè essere portato a conoscenza degli studiosi per le condizioni di isolamento nelle quali venne a trovarsi l'Africa Orientale dopo l'inizio delle ostilità con i territori limitrofi.Esso viene ora reso noto nella forma originaria, che, meno trascurabili varianti, e rimasta intatta.     

Contribuzione alla conoscenza della flora dell'Africa Orientale I Centuria

Summary

Determination of one century of East Africa's plants, collected by several students (Milchersich R., Romagnoli M., Cappelletti F., Nastasi V., Candusio R., Chiuderi A. Saccardo D., Capuano D., Jannone G. e Previeri O.) in Eritrea, Abyssinia and Italian Somalia during the yars from 1937 to 1951 and preserved in Erbario Coloniale at Florence.     

Primo contributo alla conoscenza di alcuni ifali demaziacei del Sahara algerino

Abstract

First contribution to the knowledge of some dematiaceous hyphomycetes of algerian Sahara.—Nine dematiaceous hyphomycetes, found in the algerian Sahara, near the Ouarglà Oasis, are here described. Three are reported as new species and two as new records for the desertic provenance.     

Althenia filiformis Petit: contributo alla conoscenza della ecologia della germinazione

Abstract

New data on the ecology of germination of Althenia filiformis Petit. – The author investigated the natural environment where this species, halophyte and hydrophyte, germinates. The relationships between temperature, salt concentration of pools in which Althenia filiformis lives, and the dormancy of seeds were examined. In particular the author studied the behaviour of this species considering the natural conditions of pools of Orbetello (Tuscany) and Simbirizzi (Sardinia).     

Contribuzioni alla sistematica delle Torulopsidaceae. XV-XXXIII

Zusammenfassung Es werden 31 Stämme von sporenfreien Hefen mit Mycelien und Pseudomycelien (Nebenfamilie Mycotoruleae) eingehend studiert.Alle diese Stämme sind vom Menschen isoliert worden, einer war von der Taube. Die Untersuchungen erstrecken sich auf die kulturellen Eigenschaften (mit besonderer Berücksichtigung der Riesenkolonien) sowie auf die mikromorphologischen, biochemischen und biologischen Merkmale; sie bezwecken namentlich eine genauere Gruppierung in der allgemeinen Systematik. Die Stämme gehören zum Teil zu Professor A. Castellanis Sammlung.Es gelang so die Feststellung von 19 Arten und Varietäten, darunter einer neuen Varietät, acht neuer Arten und sechs neuer Kombinationen. Die neuen Arten gehören zu den Gattungen Mycotorula, Candida, Trichosporon, Blastodendrion und Geotrichum.Außerdem wurden Diagnosen der drei Familien gegeben, in die sich die sporenfrein Hefen gruppieren, sowie der Nebenfamilien, Gruppen und Untergruppen, die in einem Schema zusammengestellt werden.Zum Schluß werden einige neue Vorschläge zur Abänderung der systematischen Stellung dieser Hefen besprochen.Per le precedenti contribuzioni vedasi: I. R. Ciferri, Mycologia 33, N. 2, 140, 146, 1931; II. – XIV: Arch. f. Protistenkunde 71, Nr. 3, 405, 452, 1930, con tavole e figure.     

Contributo alla conoscenza sistematica del genere Genista in Sardegna: I. Genista acanthoclada DC.

Abstract

Contribution to the systematic knowledge of the genus Genista in Sardinia: I. Genista acanthoclada DC. – The author takes into consideration the problems concerning some species of the genus Genista in Sardinia. Full details are furthermore given on the ecology, distribution, floristic composition and taxonomic position of Genista acanthoclada ssp. sardoa.     

Rendiconti delle Sedute e Brevi Comunicazioni

Summary

In this research we describe the embryology relating to the ovule from the first stages of the archesporium to the grown up gametophyte in Rhamnus Alaternus L., Colletia cruciata Gill. et Hook., Colletia spinosa Lam. Paliurus aculeatus Lam. and Hovenia dulcis Thunb. We ascertain everywhere a very analogous behaviour in the formation of the gametophyte, which is of the Normal type, except a very few irregularities, while the condition of the archesporium is various in the different species. We describe also the microsporogenesis observed in three species. We establish the aploid numbers 12 for Paliurus aculeatus, 11 for Colletia spinosa and the diploid number 22 for Colletia cruciata. We describe at last a remarkable parthenocarpic capacity in Colletia spinosa and the sterility probably due to a scanty vital mutation in an individuum of Paliurus aculeatus.     

Rendiconti delle Sedute e Brevi Comunicazioni

Riassunto

Nell'ambito della specie collettiva Stellaria media (L.) Cir. l'A. pone in evidenza l'esistenza di razze diploidi e di razze tetraploidi.     

Vegetazione e ambiente delle Marche e relativi problemi di salvaguardia

Abstract

Vegetation and environment in the Marche and related problems of protection. – The « Marche » region is situated in central Italy and corresponds with the natural region east of the Appennine ridge and spreading as far as the coast which is washed by the Adriatic Sea.

As to the climate, we may distinguish a coastal strip with Mesomediterranean climate with dry season, corresponding to the distribution area of Quercus ilex; a hilly strip with Submediterranean climate, corresponding to the distribution area of Quercus pubescens; a mountain strip with temperate axeric climate with sub-dry period, corresponding to the distribution area of Fagus silvatica and finally a high mountain strip with cold axeric climate, corresponding to altitude pastures. The Marche vegetation is shown in the vegetation map of Fabriano sheet (scale 1:50,000) plotted according Ozenda's vegetational series.

The following vegetation series have been plotted: submediterranean series of Quercus ilex; series of thermophilic oak wood with priority of Quercus pubescens or Quercus cerris; series of Ostrya carpinifolia; series of Quercus petraea and series of Fagus silvatica.

As far as the problems to safegard environment are concerned, a plan is given providing for the institution of 4 complete nature reserves, 34 nature reserves, and 9 regional nature parks among which those of Monte Conero, of Monti Sibillini and Monti della Laga.