摘要:

The morphological variation between populations ofCochleariain Northern Scandinavia has been analysed. The variation is correlated to ecology, and four ecotypes are recognized. Based on the morphological differentiation of the ecotypes and the results of crossing experiments, the populations are referred to the following three taxa:C. officinalisssp.officinaliswhich includes the common beach ecotype and the bird cliff ecotype;C. officinalisssp.integrifoliastat. nov. which includes the spring ecotype growing in inland localities up to about 600 m a.s.l. in cold more or less eutrophic springs, andC. officinalisssp.norvegicassp. nov. which includes the estuary ecotype, growing in poor, often inundated habitats near river outlets at the fjord ends. All the differentiation has taken place at the tetraploid level (2n = 24). The subspecies are kept more or less distinct due to ecological and seasonal isolating mechanisms rather than internal, reproductive barriers. A key to the subspecies and distribution maps for ssp.integrifoliaand ssp.norvegicaare presented.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1990.tb01769.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Three new species ofJusticiasect.Justicia(Acanthaceae) are described:Justicia regisfrom Kenya,Justicia acutifoliafrom Tanzania,and Justicia telloensisfrom Cameroun.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1990.tb01770.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

The new speciesTephrosia anomalafrom SW Somalia is described and illustrated. Its possible affinity with a group of American species is pointed out.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1990.tb01771.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Streptopetalum arenariumsp. nov., a heterostylous species apparently closely related to the homostylous 5.hildebrandtüin Kenya and north Tanzania, is described from deciduous bushland on sand in central and southern Somalia

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1990.tb01772.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

The new speciesNymphoides krishnakesarais described from India.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1990.tb01773.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

The distribution in bogs is outlined for all species occurring in bogs only in part of their SE Fennoscandian area. The patterns displayed by these species are diverse, and different explanations are applicable to different patterns. Regional variation in SE Fennoscandian bog and extremely poor fen vegetation is described, based on all available published material. Carpets, lawns, and hummocks are considered separately. Four regional vegetational gradients are identified: (1) W‐E, (2) S‐N, (3) SW‐NE, and (4) NW‐SE. These are related to different underlying climatic gradients: (1) humidity (precipitation surplus), (2) temperature, (3) and (4) combinations of humidity and temperature. Effects of climatic gradients on the ground water regime are outlined. The decisive factor for the SW‐NE gradient is probably frequency of ground water table fluctuations, the NW‐SE gradient is likely to be caused by differences in water supply and ground water flow rates. The main gradient of carpets is S‐N (SE‐NW), of lawns SW‐NE (W‐E), and of hummocks partly SW‐NE, partly S‐N. The effects of the underlying ecological factors on the different plant groups are discussed in order to explain the patterns of regional

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1990.tb01774.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

The identity ofHygrocybe vitellinais discussed based on a number of different interpretations. The interpretation given by Orton is considered to be correct, withH. luteolaetaas a synonym.H. vitellinasensu Møller isHygrocybe citrinopallida, H. vitellinasensu. Lundell&Nannfeldt isHygrocybe lepidaandHygrocybe vitellinasensu most European authors is misappliedHygrocybe ceracea. A new sectionOreocybeis proposed forH. citrinopallida, H. lilacinaandH. xanthochora

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1990.tb01775.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Thirty‐four species of the lichen genusPhyscia(s. str.) in Central and South America are defined. Morphology, anatomy, chemistry, distribution, habitat, relation to other taxa and some evolutionary trends are discussed. A key to the species is presented. Eleven species are described as new;P. cinerea, P. convexella, P. coronifera, P. decorticata, P. kalbii, P. lobulata, P. lopezii, P. manuelii, P. rolfii, P. sinuosa, andP. tenuis. P. nubilais a new name forHeterodermia desertoru

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1990.tb01776.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

This is the first publication describing scale‐bearing Chrysophyceae from India by means of electron microscopy. Twenty seven such taxa are described from samples for ponds, rivers and thermal springs. Twenty of these areMallomonasspp.:M. akrokomos, M. bronchartiana, M. caudata, M. ceylanica, M. costata, M. crassisquanta, M. cyathellatavar.cyathellata, M. cyathellatavar.chilensis, M. cyathellatavar.kenyana, M. guttata, M. heterospina, M. mangofera f. mangofera, M. mangoferaf.foveata, M. mangoferea I. reticulata, M. matvienkoae I. matvienkoae, M. mat‐vienkoaevar.grandis, M. morrisonensis, M. peronoides, M. portae‐ferreae, andM. tasmanica. Three areSynurataxa:S. curtispina, S. peterseniif.petersenii, andS. petersenii I. kufferathii. Two areSpiniferomonasspecies:S. coronacircumspinaandS. enigmata. ParaphysomonasandChrysosphaerellawere each represented by one species:P. vestitaand C.longispina. The water bodies from which these samples were taken were mostly eutrophic and nutrient rich. The majority of the taxa were obtained during the summer months when water temperatures were high. This contradicts the widely held belief that silica‐scaled chrysophytes are mainly found in cold oligotrophic and mesotrophic waters.Mallomonas portae‐ferreaeand one unidentified species ofMallomonaswere recorded also from thermal springs having water temperatures u

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1990.tb01777.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY