Haseltonia最新文献_第7页

Aloe sergoitensis, a New Species of Aloe (Asphodelaceae) in Kenya, with Forked Marginal Teeth on the Leaves 肯尼亚芦荟(藤科)一新种，叶缘齿分叉

IF 1.5 4区生物学

Haseltonia Pub Date : 2018-12-28 DOI: 10.2985/026.025.0111

L. Newton

引用次数: 0

Notes on the Delosperma-Clade (Aizoaceae) 无胚乳科植物的注释(英文)

IF 1.5 4区生物学

Haseltonia Pub Date : 2018-12-28 DOI: 10.2985/026.025.0109

S. Liede‐Schumann, Leonard E. Newton

引用次数: 2

New Cactus Records from Gran Canaria with a Key to the Opuntioid Species Now Established in the Canary Islands (Spain) 大加那利群岛仙人掌新记录及其在西班牙加那利群岛发现的机会类物种的钥匙

IF 1.5 4区生物学

Haseltonia Pub Date : 2018-12-28 DOI: 10.2985/026.025.0110

F. Verloove, Águedo Marrero Rodríguez, M. Salas-Pascual, A. Guiggi

引用次数: 3

Manganese Tolerance of Aloe greatheadii Schönland var. davyana (Schönland) Glen & D.S.Hardy (Asphodelaceae: Alooideae) on Ultramafic-Peralkaline Outcrops, South Africa Glen & D.S.Hardy (Asphodelaceae: Alooideae)在超碱性-过碱性露头上的锰耐受性研究，南非

IF 1.5 4区生物学

Haseltonia Pub Date : 2018-12-28 DOI: 10.2985/026.025.0108

S. Siebert, Janine Steytler, R. Boneschans, F. Siebert, M. Coetzee

{"title":"Manganese Tolerance of Aloe greatheadii Schönland var. davyana (Schönland) Glen & D.S.Hardy (Asphodelaceae: Alooideae) on Ultramafic-Peralkaline Outcrops, South Africa","authors":"S. Siebert, Janine Steytler, R. Boneschans, F. Siebert, M. Coetzee","doi":"10.2985/026.025.0108","DOIUrl":"https://doi.org/10.2985/026.025.0108","url":null,"abstract":"Abstract: Very little is known about the relations between aloes and soil metals, despite evidence that aloes often form dense populations on metalliferous soils. This study targeted eight rock outcrops where aloes dominated the vegetation to determine whether these succulents have a preference for soils rich in heavy metals and whether they accumulate any of these metals in their leaf tissue. Soil analyses suggested that densely populated rock outcrops are rarely characterised by high concentrations of heavy metals. Analyses of leaf material revealed no metal hyperaccumulators, with most species acting as excluders of most metals. The only metals to be reflected in leaf material to some degree across populations were copper (mean of 4 µg g-1), iron (mean of 208 µg g-1), manganese (mean of 342 µg g-1) and zinc (mean of 31 µg g-1)(all values are based on leaf dry weight). Aloe greatheadii plants from the ultramafic-peralkaline Koedoesfontein Complex in the Vredefort Dome contained the highest concentrations of Mn (558 µg g-1) and were subjected to further sampling across four geological substrates to determine the limits of its accumulation ability (mean of 855 µg g-1 on wehrlite). This aloe was found to be non-hyperaccumulating, but tolerant to elevated Mn concentrations in its tissue. The uptake of Mn from the soil was not so much influenced by soil available Mn, but rather by decreasing pH, and increasing electric conductivity and soil potassium.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"30 1","pages":"91 - 99"},"PeriodicalIF":1.5,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80031989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

New Taxa in Euphorbia (Euphorbiaceae) in Southern Africa 标题南部非洲大戟科大戟属植物的新分类群

IF 1.5 4区生物学

Haseltonia Pub Date : 2018-12-28 DOI: 10.2985/026.025.0104

P. Bruyns

{"title":"New Taxa in Euphorbia (Euphorbiaceae) in Southern Africa","authors":"P. Bruyns","doi":"10.2985/026.025.0104","DOIUrl":"https://doi.org/10.2985/026.025.0104","url":null,"abstract":"Abstract: In preparation for a monograph of Euphorbia in southern Africa, twelve new taxa are described. In Euphorbia subsect. Medusea (Haw.) Pax & K. Hoffm. one new species, E. willowmorensis Bruyns and three new subspecies, E. arida subsp. camdebooensis Bruyns, E. friedrichiae subsp. pofadderensis Bruyns and E. multiceps subsp. tanquana Bruyns are described; two new subspecies, E. ferox subsp. calitzdorpensis Bruyns and E. pseudoglobosa subsp. vlokii Bruyns are described in Euphorbia ser. Meleuphorbia (A.Berger) Bruyns; one new subspecies, Euphorbia patula subsp. brucebayeri Bruyns is described in Euphorbia subsect. Dactylanthes (Haw.) Pax & K.Hoffm. In Euphorbia sect. Articulofruticosae Bruyns one new subspecies, E. ephedroides subsp. gamsbergensis Bruyns is described. In Euphorbia sect. Esula (Pers.) Dumort. one new species, E. corneliae Bruyns, is described from southern Namibia. In Euphorbia sect. Euphorbia there are one new species, E. otavibergensis Bruyns; one new subspecies E. subsalsa subsp. otzenii Bruyns; and one new variety, E. lydenburgensis var. minor Bruyns. In addition, in subsect. Dactylanthes the concept of Euphorbia patula Mill. is substantially re-configured and four subspecies are recognized, with E. anacantha Aiton and E. wilmaniae Marloth included as two of these subspecies.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"41 1","pages":"35 - 56"},"PeriodicalIF":1.5,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80190468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Identity and Typification of Astroloba pentagona (Haw.) Uitewaal (Asphodelaceae: Alooideae), the Type Species of the Genus Astroloba Uitewaal 五角星的同一性与类型化龙葵属(龙葵科:龙葵总科)，龙葵属模式种

IF 1.5 4区生物学

Haseltonia Pub Date : 2018-12-28 DOI: 10.2985/026.025.0105

S. Molteno, Gideon F. Smith

引用次数: 3

The Nomenclature of Aloe ferox Mill. (Asphodelaceae: Alooideae), an Iconic Medium-Sized to Large Aloe from Southern South Africa 芦荟的命名法。(藤科:芦荟总科)，南非南部一种标志性的中型到大型芦荟

IF 1.5 4区生物学

Haseltonia Pub Date : 2018-12-28 DOI: 10.2985/026.025.0112

Gideon F. Smith, E. Figueiredo

引用次数: 2

Kalanchoe crouchii Gideon F.Sm. & Figueiredo (Crassulaceae), a New Species from the Dolomites of the Wolkberg Centre of Endemism, Mpumalanga Province, South Africa 吉迪恩F.Sm。& Figueiredo (Crassulaceae)，来自南非Mpumalanga省Wolkberg特有中心白云岩的一新种

IF 1.5 4区生物学

Haseltonia Pub Date : 2018-12-28 DOI: 10.2985/026.025.0107

Gideon F. Smith, E. Figueiredo

引用次数: 8

A Synopsis of Astroloba Uitewaal (Asphodelaceae: Alooideae): Species, Types, and Infrageneric Classification 文章标题龙葵属植物概述(龙葵科:龙葵总科):种类、类型及属内分类

IF 1.5 4区生物学

Haseltonia Pub Date : 2018-12-28 DOI: 10.2985/026.025.0106

S. Molteno, Gideon F. Smith, E. Figueiredo

引用次数: 2

Many Cacti Have Clusters of Terminal Tracheids on Their Cortical Bundles 许多仙人掌在其皮质束上有一簇末端管胞

IF 1.5 4区生物学

Haseltonia Pub Date : 2018-08-01 DOI: 10.2985/026.024.0101

J. Mauseth

{"title":"Many Cacti Have Clusters of Terminal Tracheids on Their Cortical Bundles","authors":"J. Mauseth","doi":"10.2985/026.024.0101","DOIUrl":"https://doi.org/10.2985/026.024.0101","url":null,"abstract":"Abstract: Most cacti in subfamily Cactoideae have a thick cortex vascularized by a network of cortical bundles. It was noticed that some cortical bundles had a leaf-like feature: clusters of terminal tracheids. The objective of this research was to examine a range of species and characterize the clusters. Of the 226 species examined in 85 genera, 105 (46.7%) had clusters of terminal tracheids. Species with clusters were widely distributed throughout the subfamily. A few genera were uniform, with all sampled species having clusters (Ariocarpus, Corryocactus) or with all sampled species lacking them (Armatocereus, Mammillaria, Melocactus). Most genera were variable (e. g., Cereus, Cleistocactus) having some species with terminal tracheid clusters and other species lacking them. Where present, the clusters consisted of short, broad tracheids (not vessel elements), one or several phloem poles, but never fibers or sclereids (except Strombocactus disciformis). Clusters were most likely to occur at the apex of a rib or tubercle, especially near an areole; they often also occurred along the face of a rib; they were least common at the sinuses between ribs. Without exception, they occurred within the palisade cortex or along its base but never deep within the cortex. No ecological or functional role was obvious.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"57 1","pages":"64 - 74"},"PeriodicalIF":1.5,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83683159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2