Webbia Pub Date : 2019-01-02 DOI: 10.1080/00837792.2019.1609257

M. Naive, J. A. G. P. Dalisay, G. Alejandro

引用次数: 0

Novelties and notes on Plantago sect. Virginica (Plantaginaceae), including the description of a new species and a revised identification key 车前草属(车前草科)的新记录和注释，包括一个新种的描述和一个修订的鉴定密钥

Webbia Pub Date : 2019-01-02 DOI: 10.1080/00837792.2019.1574114

G. Hassemer

引用次数: 7

New interesting records of charophytes (Charales, Charophyceae) from Eurasia and Africa 欧亚大陆和非洲轮藻类新记录（轮藻目轮藻科）

Webbia Pub Date : 2019-01-02 DOI: 10.1080/00837792.2019.1609337

R. Romanov

引用次数: 5

One Chara does not make Charetea in the Mediterranean aquatic vegetation 在地中海的水生植物中，有一种不叫Charetea的查拉

Webbia Pub Date : 2019-01-02 DOI: 10.1080/00837792.2019.1607142

R. Guarino, C. Marcenó, V. Ilardi, A. Mannino, A. Troìa

引用次数: 6

Rediscovery of Ruellia reitzii (Acanthaceae), a narrowly endemic critically endangered species from Santa Catarina, southern Brazil, and notes on R. squarrosa 巴西南部Santa Catarina的一种特有的极度濒危物种Ruellia reitzii（无患子科）的重新发现和R.squarosa的注释

Webbia Pub Date : 2019-01-02 DOI: 10.1080/00837792.2019.1607997

L. Funez, G. Hassemer, E. A. Lunkes, E. R. Drechsler-Santos

引用次数: 0

Germination capability of four charophyte populations (Characeae) from Mediterranean brackish ponds under warm experimental conditions 地中海半咸淡水塘四种蕨类植物种群在温暖实验条件下的萌发能力

Webbia Pub Date : 2019-01-02 DOI: 10.1080/00837792.2019.1608419

Sara Calero, M. A. Rodrigo

{"title":"Germination capability of four charophyte populations (Characeae) from Mediterranean brackish ponds under warm experimental conditions","authors":"Sara Calero, M. A. Rodrigo","doi":"10.1080/00837792.2019.1608419","DOIUrl":"https://doi.org/10.1080/00837792.2019.1608419","url":null,"abstract":"ABSTRACT The diaspore banks from two brackish ponds within the Albufera de València Natural Park (Spain) containing oospores of Chara hispida, C. aspera, C. canescens and Nitella hyalina were analysed and their germination capability studied under controlled temperature conditions. The top layer of sediment from each meadow was collected and sequentially sieved to isolate the charophyte oospores, subsequently identified and counted under the microscope. The density of apparently viable fructifications varied largely within the studied ponds and within specific meadows. In general, but not always, the most abundant oospores belonged to the species forming the meadow. An additional set of surficial sediment samples were collected to perform germination trials in an indoor culture room under three temperature treatments (21, 25 and 29°C). For each species, 219–272 fructifications were allocated inside small perforated packages that were placed in Petri dishes (n = 3) and submerged for 40 days in plastic containers. Germination rates were low for the four species in all temperatures (0–7%), with no large differences detected amongst treatments. C. aspera was the first species to germinate and the one with the most germlings. Higher temperatures negatively affected its germination; the same trend was shown by C. canescens. Dense oospore banks and low germination rates have been previously described for charophytes from temporary habitats. However, it seems that the recovery of charophyte meadows after droughts will be hindered by a warmer climate. Further studies concerning the optimal conditions for germination are needed to understand the future capability of charophyte meadows to re-establish in Mediterranean ecosystems.","PeriodicalId":39391,"journal":{"name":"Webbia","volume":"74 1","pages":"149 - 158"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00837792.2019.1608419","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42563962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Eriocaulon albosetaceum: a new species of Eriocaulaceae from the Brazilian Cerrado 白绒Erioculon：巴西Cerrado产Erioculae的一个新种

Webbia Pub Date : 2019-01-02 DOI: 10.1080/00837792.2019.1572964

Adriana Oliveira, C. Bove

{"title":"Eriocaulon albosetaceum: a new species of Eriocaulaceae from the Brazilian Cerrado","authors":"Adriana Oliveira, C. Bove","doi":"10.1080/00837792.2019.1572964","DOIUrl":"https://doi.org/10.1080/00837792.2019.1572964","url":null,"abstract":"ABSTRACT Eriocaulon is a predominantly pantropical and monophyletic genus, with aquatic or amphibian species and a high endemism rate. The number of nerves in the leaves varies widely among the species of the genus, but up to now only four have one-nerved leaves: Eriocaulon araguaiense, E. cylindratum, E. huanchacanum and E. setaceum. These species are exclusive to South America, except E. setaceum, which is broadly distributed. Eriocaulon setaceum is easily recognised by its aquatic habit, linear, one-nerved leaves, and the cucullate sepals of the pistillate flowers. However, it has characters with wide variation, including the scape number, stem length, and the presence or absence of trichomes, which make the species difficult to delimit. Here, we describe a new species from the Cerrado: Eriocaulon albosetaceum that is similar to E. setaceum. To clarify the differences between them, we present tables of distinguishing characters, including the seed coat and anatomical data. Also, we describe the seed coat and the scape anatomy of vouchers of E. setaceum collected in Brazil. The results show a different kind of seed projection when compared with specimens from Asia, corroborating the idea that E. setaceum is a complex of at least two species that occur in both the Old and New Worlds.","PeriodicalId":39391,"journal":{"name":"Webbia","volume":"74 1","pages":"15 - 21"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00837792.2019.1572964","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43753898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Leaf epidermis of the African genus Mallotus Lour. (Euphorbiaceae) section Rottleropsis Müll. Arg. and its systematic value 非洲锦葵属的叶表皮。(大戟科)Rottleropsis m<e:1>参数。以及它的系统价值

Webbia Pub Date : 2019-01-02 DOI: 10.1080/00837792.2019.1589742

A. Kadiri, A. Ayodele, J. Olowokudejo

{"title":"Leaf epidermis of the African genus Mallotus Lour. (Euphorbiaceae) section Rottleropsis Müll. Arg. and its systematic value","authors":"A. Kadiri, A. Ayodele, J. Olowokudejo","doi":"10.1080/00837792.2019.1589742","DOIUrl":"https://doi.org/10.1080/00837792.2019.1589742","url":null,"abstract":"ABSTRACT The leaf epidermal information on the two African Mallotus species is updated with data derived from herbarium specimens using light and scanning electron microscopy. Stomata, indumentum and cuticular ornamentation are particularly informative. All the species have paracytic stomatal type and amphistomatic leaves with stomata on the adaxial surface being restricted to the midribs and big veins. Brachyparacytic stomatal type and abaxially restricted disc-shaped multicellular glandular trichomes distinguish M. oppositifolius var. glabratus from M. oppositifolius var. pubescens, while presence of hemibrachyparacytic stomata and cuticular striations differentiate M. subulatus from M. oppositifolius. However, the quantitative and leaf areole characters overlap considerably. Based on a suite of these characters, the distant relationship indicated between M. oppositifolius and M. subulatus and the suggestion to subsume section Axenfeldia in the polyphyletic section Rottleropsis is upheld with some cross-referenced data; also, an indented dichotomous key for separating the three taxa is presented.","PeriodicalId":39391,"journal":{"name":"Webbia","volume":"74 1","pages":"71 - 80"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00837792.2019.1589742","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48361834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

New records and observations to the Characean flora (Charales, Charophyceae) of Sicily (Italy) 意大利西西里岛特色植物群(Charales, Charophyceae)的新记录与新观察

Webbia Pub Date : 2019-01-02 DOI: 10.1080/00837792.2019.1609258

R. Romanov, T. Napolitano, K. van de Weyer, A. Troìa

引用次数: 10

The occurrence of sexual Chara canescens (Charales, Charophyceae) in Sardinia (Italy) 撒丁岛（意大利）有性藤壶菌（Charales，Charophyceae）的发生

Webbia Pub Date : 2019-01-02 DOI: 10.1080/00837792.2019.1610265

P. Nowak, K. van de Weyer, R. Becker

引用次数: 3

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