摘要:

The Nordic species ofCorydalissect.Corydalisare discussed. The nameC. laxahas been applied to largeflowered forms ofC. pumila, but also to C.solidaand various hybrid derivates between them, and is superfluous as well as confusing. A lectotype forC. laxais selected. The Baltic endemicCorydalis gotlandicais described. It is an allotetraploid derivative ofC. solidaandintermedia.Flora nordica notes no. 2.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1991.tb01811.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1991.tb01812.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Dasypyrum(tribe Triticeae) is revised. Two species are recognized: the annualD. villosum(2n = 14) and the perennialD. breviaristatum(2n = 28). The typification ofD. villosumis discussed. The combinationD. hordeaceumis demonstrated to be based on a later homonym and for that reason a new combination,D. breviaristatum, is made. A key and a map showing the distribution of the species are presented. Interspecific hybridization and the phylogenetic relationships of the genus are discussed.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1991.tb01813.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Natural hybridization within the genusCallitrichein Sweden was studied on the basis of herbarium material and field studies. One triploid (2n = 15) hybriditaxon is locally common in Scania, S Sweden, where it is shown to be longlived and to disperse vegetatively to form large clones. The triploid and its derivatives are described as a nothospecies under the name ofCallitriche × vigens.Its characteristics, parentage and affinities to Central European hybrids is discussed. As putative parent species, C.platycarpa(2n = 20) andC. cophocarpa(2n = 10) are indicated. The hybrid betweenC. platycarpaandC. hamulata(2n = 29) and a putative hybrid betweenC. platycarpaand C.stagnaliswere only encountered once each and believed to be shortlived

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1991.tb01814.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1991.tb01815.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

A new combination is presented inHordeumviz.H. brachyantherumssp.californicumcomb.&stat. nov., an endemic Californian diploid.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1991.tb01816.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1991.tb01817.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

The floral morphology of the southern African genera of Orchidaceae‐Orchideae‐Orchidinae (Brachycorythis, Schwartzkopffia, Neobolusia, Schizochilus, HolothrixandBartholina) is surveyed paying special attention to the gynostemium. Ontogenetic data are provided for a number of species that appear to be essential in formulating a proper interpretation of the gynostemium. The floral architecture is shown to be basically similar to that of the (much better known) European representatives of the subtribe. This, however, does not fully apply to the homology of the lateral gynostemium appendages (“auricles”): InBrachycorythis, NeobolusiaandSchizochilusthese develop like inOrchisandDactylorhiza.Their prominent sculptured portions originate from dorsal stamen outgrowths and correspond to filament excrescences. Structures obviously homologous to lateral inner stamens can be recognized in the early ontogeny, but are in the mature flower incorporated in the ‘arch’ connecting the lip with the gynostemium. In contrast, inHolothrixandBartholinathe gynostemium appendages correspond entirely to staminodes, while the filament excrescences are missing. It is also shown that the ‘concave’ stigma said to be characteristic of the Orchidinae is in fact ± convex or even pad‐like, but is generally positioned in a cavity under the rostellum. The ‘erect’ anther (the main diagnostic feature of the Orchideae) is reflexed up to 45° in some taxa. Affinities of the genera are briefly discussed. The generic separation ofSchwartzkopffiaandNeobolusiafromBrachycorythisdoes not appear justified.Neobolusia virgineais obviously misplaced in the respective genus, and eventually merits generic status. The affinities ofSchizochilusremain ± obscure at the moment.Bartholinaappears to be merely a small group of spe

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1991.tb01818.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

The genusCabomba(Cabombaceae) is revised. Five species and three varieties are recognized:C. aquatica, C. palaeformis, C. furcata, C. haynesiiandC. carolinianaincluding var.caroliniana, var.pulcherrima, and var.flavidavar. nov. A basic chromosome number of x = 13 is proposed. Special emphasis has been given to pollen and seed morphology as revealed by SEM studies.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1991.tb01819.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1991.tb01820.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY