摘要:

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm‐temperate areas of the world. An analysis of the type species,V. spiralis(Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups.Osmundaria, a genus known only in southern Australia, was studied in relation toVidalia, and its separation from theVidaliaassemblage is not accepted. Species ofVidaliatherefore are transferred to the older genus name,Osmundaria.Two new species,Osmundaria papenfussiiandOsmundaria oliveaeare described from Natal. Confusion in the usage of the epithet,Vidalia fimbrialaBrown ex Turner has been clarified, andVidalia gregariaFalkenberg, described as an epiphyte onOsmundaria pro/iferaLamouroux, is revealed to be young branches of the host,Osmundaria prolifer

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1991.tb02281.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Dispersed tubes and filaments from the uppermost Ordovician, Silurian and Lower Devonian of the Anglo‐Welsh Basin of Great Britain are described and classified using the artificial Anteturma system instituted for spores. The new Anteturma Trichomiformis is erected containing two new Turmae, Tubiformis and Filiformis. Within Tubiformis, the Infraturma Laevimurali, Endomurali and Extramurali are described, each containing a single genus with four, two and one species respectively. Within Filiformis, the Infraturma Ornatimurali is erected, based on a monospecific genus. Two assemblages of tubes and filaments are recognized. The older is found in uppermost Ordovician through to middle Silurian strata and is typified by a low diversity of smooth‐walled tubes. The younger ranges from the middle Silurian at least to the Lower Devonian and is typified by various smooth‐walled tubes, tubes with internal and external thickenings, and filaments. The majority of tubes and filaments are considered derived from the Nematophytales

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1991.tb02282.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Taxonomic changes in three speciesof Diplotaxisare proposed.Diplotaxis erucoides(L.) DC. subsp.cossoniana(Boiss.) Martinez‐Laborde,comb, et stat. nov.is proposed for the Algerian subspecies ofD. erucoides.Two North African varieties are raised to subspecific rank:D. tenuisiliquaDel. subsp.rupestris(Ball) Martinez‐Laborde,stat. nov.andD. muralis(L.) DC. subsp.ceratophylla(Batt.) Martinez‐Laborde,stat

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1991.tb02283.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

TheSolanum sessilespecies group is one of eight putatively monophyletic subgroups of the large and diverseSolanumsectionGeminata.The species group comprises ten species of mostly northern South American trees and shrubs. Characters and character states peculiar toSolanumare discussed in detail. A cladistic analysis of thesessilegroup yielded four equally parsimonious trees which represent two basic tree topologies. The consensus cladogram is composed of three main clades. Biogeographic analysis using the consensus tree revealed no components in common to the three clades. Possible geographical scenarios are discussed with reference to the geological history of northern South America.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1991.tb02284.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Book reviewed in this article:Advances in Botanical Research 16, edited by J. A. Callow.Intermountain Flora: Vascular Plants of the Intermountain West, U.S.A., 3B. Fabales, by Rupert C. Barneby, edited by A, Cronquist, A. H. Holmgren, N. H. Holmgren, J. L. Reveal&P. K. Holmgren.Lost Crops of the Incas: Little‐Known Plants of the Andes with Promise for Worldwide CultivationPhotosynthetic Pigments of Algae, by Kingsley S. Rowa

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1991.tb02285.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1991.tb02281a.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY